H`Tc@sdZddlZddlmZmZmZmZddlmZm Z ddlm Z m Z mZm Z m Z mZddlmZdd lmZmZmZmZmZmZmZmZdd lmZdd lmZddlZd d ddgZej Z!dZ"de#fdYZ$ej%dZ&ej%dZ'ej%dZ(ej%dZ)ej%dZ*d e#fdYZ+d e$fdYZ,de$fdYZ-dZ.dZ/dZ0ej1Z2dS(s1Provides the Session class and related utilities.iNi(tutiltsqltenginetexc(Rt expressioni(tSessionExtensiont attributesRtquerytloadingtidentity(tinspect(t object_mappert class_mappert_class_to_mappert _state_mappert object_statet _none_sett state_strt instance_str(tUOWTransaction(tstatetSessiontSessionTransactionRt sessionmakercCs3|jr/yt|jSWq/tk r+q/XndS(s_Given an :class:`.InstanceState`, return the :class:`.Session` associated, if any. N(t session_idt _sessionstKeyErrortNone(R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt_state_session#s   t_SessionClassMethodscBsJeZdZedZeejddZedZRS(sBClass-level methods for :class:`.Session`, :class:`.sessionmaker`.cCs%xtjD]}|jq WdS(sClose *all* sessions in memory.N(Rtvaluestclose(tclstsess((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt close_all3sssqlalchemy.orm.utilcOs|j||S(sZReturn an identity key. This is an alias of :func:`.util.identity_key`. (t identity_key(R torm_utiltargstkwargs((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR#:scCs t|S(sxReturn the :class:`.Session` to which an object belongs. This is an alias of :func:`.object_session`. (tobject_session(R tinstance((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR'Ds( t__name__t __module__t__doc__t classmethodR"Rt dependenciesR#R'(((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR/s  tACTIVEtPREPAREDt COMMITTEDtDEACTIVEtCLOSEDcBseZdZdZdedZedZeeeddZ edZ dZ edZ ddZ d Zed Zd Zd Zd ZdZdZedZdZdZdZdZRS(sA :class:`.Session`-level transaction. :class:`.SessionTransaction` is a mostly behind-the-scenes object not normally referenced directly by application code. It coordinates among multiple :class:`.Connection` objects, maintaining a database transaction for each one individually, committing or rolling them back all at once. It also provides optional two-phase commit behavior which can augment this coordination operation. The :attr:`.Session.transaction` attribute of :class:`.Session` refers to the current :class:`.SessionTransaction` object in use, if any. A :class:`.SessionTransaction` is associated with a :class:`.Session` in its default mode of ``autocommit=False`` immediately, associated with no database connections. As the :class:`.Session` is called upon to emit SQL on behalf of various :class:`.Engine` or :class:`.Connection` objects, a corresponding :class:`.Connection` and associated :class:`.Transaction` is added to a collection within the :class:`.SessionTransaction` object, becoming one of the connection/transaction pairs maintained by the :class:`.SessionTransaction`. The lifespan of the :class:`.SessionTransaction` ends when the :meth:`.Session.commit`, :meth:`.Session.rollback` or :meth:`.Session.close` methods are called. At this point, the :class:`.SessionTransaction` removes its association with its parent :class:`.Session`. A :class:`.Session` that is in ``autocommit=False`` mode will create a new :class:`.SessionTransaction` to replace it immediately, whereas a :class:`.Session` that's in ``autocommit=True`` mode will remain without a :class:`.SessionTransaction` until the :meth:`.Session.begin` method is called. Another detail of :class:`.SessionTransaction` behavior is that it is capable of "nesting". This means that the :meth:`.Session.begin` method can be called while an existing :class:`.SessionTransaction` is already present, producing a new :class:`.SessionTransaction` that temporarily replaces the parent :class:`.SessionTransaction`. When a :class:`.SessionTransaction` is produced as nested, it assigns itself to the :attr:`.Session.transaction` attribute. When it is ended via :meth:`.Session.commit` or :meth:`.Session.rollback`, it restores its parent :class:`.SessionTransaction` back onto the :attr:`.Session.transaction` attribute. The behavior is effectively a stack, where :attr:`.Session.transaction` refers to the current head of the stack. The purpose of this stack is to allow nesting of :meth:`.Session.rollback` or :meth:`.Session.commit` calls in context with various flavors of :meth:`.Session.begin`. This nesting behavior applies to when :meth:`.Session.begin_nested` is used to emit a SAVEPOINT transaction, and is also used to produce a so-called "subtransaction" which allows a block of code to use a begin/rollback/commit sequence regardless of whether or not its enclosing code block has begun a transaction. The :meth:`.flush` method, whether called explicitly or via autoflush, is the primary consumer of the "subtransaction" feature, in that it wishes to guarantee that it works within in a transaction block regardless of whether or not the :class:`.Session` is in transactional mode when the method is called. See also: :meth:`.Session.rollback` :meth:`.Session.commit` :meth:`.Session.begin` :meth:`.Session.begin_nested` :attr:`.Session.is_active` :meth:`.SessionEvents.after_commit` :meth:`.SessionEvents.after_rollback` :meth:`.SessionEvents.after_soft_rollback` cCs||_i|_||_||_t|_| rL|rLtjdn|jjre|j n|jj j r|jj j |j|ndS(NsOCan't start a SAVEPOINT transaction when no existing transaction is in progress( tsessiont _connectionst_parenttnestedR.t_statetsa_exctInvalidRequestErrort_enable_transaction_accountingt_take_snapshottdispatchtafter_transaction_create(tselfR3tparentR6((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt__init__s         cCs|jdk o|jtkS(N(R3RR7R.(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt is_activessThis transaction is closedcCs|jtkr!tjdn|jtkrK|stjdqn~|jtkr| r| r|jrtjd|jq|stjdqqn!|jtkrtj|ndS(Ns\This session is in 'committed' state; no further SQL can be emitted within this transaction.s[This session is in 'prepared' state; no further SQL can be emitted within this transaction.sThis Session's transaction has been rolled back due to a previous exception during flush. 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can't prepare.(R5RR3RxR8R9t _prepare_impl(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pytpreparePs cCsV|j|jdks"|jr;|jjj|jn|jj}||k r}x'|jd|D]}|j qfWn|jj sxFt dD]&}|jj rPn|jj qWtjdn|jdkrI|jjrIy2x+t|jjD]}|djqWWqItj|jWdQXqIXnt|_dS(NRQidsrOver 100 subsequent flushes have occurred within session.commit() - is an after_flush() hook creating new objects?i(RHR5RR6R3R<t before_commitR~RPtcommitRVtranget _is_cleanRWRt FlushErrorRxR\R4RRRt safe_reraisetrollbackR/R7(R>tstxtsubtransactiont _flush_guardtt((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRWs,      cCs|jdt|jtk r,|jn|jdksD|jrx+t|j j D]}|dj qZWt |_|j jj|j |j jr|jqn|j|jS(NRDi(RHRfR7R/RR5RR6R\R4RRR0R3R<t after_commitR:RtR(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRvs    cCsP|jdtdt|jj}||k rXx'|jd|D]}|jqAWn|jttfkrxO|jD]>}|j dks|j r|j t |_Pqzt |_qzWn|j}|jjr|j rtjd|jd|j n|j|j r6|r6tjd|j _n|jj|||j S(NRDRERQs\Session's state has been changed on a non-active transaction - this state will be discarded.Rli(RHRfR3R~RPRR7R.R/R5RR6t_rollback_implR1R:RRtwarnRptsystexc_infoRBR<tafter_soft_rollback(R>t_capture_exceptionRRR~R!((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs.        cCsjx+t|jjD]}|djqW|jjrP|jd|jn|jjj |jdS(NiRl( R\R4RRR3R:RpR6R<tafter_rollback(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs  cCs|j|j_|jdkrgxFt|jjD],\}}}|rV|jq4|jq4Wnt|_ |jj j r|jj j |j|n|jdkr|jj s|jj qnd|_d|_dS(N(R5R3R~RR\R4RRR2R7R<tafter_transaction_endt autocommitR{(R>RNR~t autoclose((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs"    cCs|S(N((R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt __enter__scCs~|jdtdt|jjdkr,dS|dkrpy|jWqztj|jWdQXqzXn |jdS(NRFRD( RHRfR3R~RRRRR(R>ttypetvaluet traceback((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt__exit__s  N(R)R*R+RRBtFalseR@tpropertyRARHRIRNRORPR;RpRtRKRRRRRRRR(((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRVs0O          %  cBseZdZdSZdTeeeeeedTdTdTejd Z dTZ dTZ e j dZeedZdZdZdZdZdTdTdTedZd ZdTdTdTd!ZdTdTdTd"Zd#Zd$Zd%Zd&ZdTdTd'Zd(Zee jd)Zd*Z dTdTd+Z!d,Z"dTd-Z#d.Z$d/Z%e j&d0d1d2Z'd3Z(d4Z)d5Z*d6Z+d7Z,ed8Z-d9Z.d:Z/d;Z0ed<Z1edTd=Z2d>Z3d?Z4ed@Z5dAZ6dBZ7dCZ8dDZ9edEZ:dFZ;dGZ<dHZ=dTdIZ>dJZ?dKZ@dTdLZAeedMZBedNZCdTZDedOZEedPZFedQZGedRZHRS(UsManages persistence operations for ORM-mapped objects. The Session's usage paradigm is described at :doc:`/orm/session`. t __contains__t__iter__taddtadd_allR{RzRRRNtdeletetexecutetexpiret expire_alltexpunget expunge_allRWRJt is_modifiedtmergeRtrefreshRtscalarc Cs|rtj|_ntjdtj|_|j|_i|_i|_||_ i|_ t |_ t |_ d|_t|_||_||_||_||_||_| |_| r|jj| n| r x*tj| D]} tj|| qWn|dk rxm|jD]\\} }t| }|jrW|j | |q#|j!rs|j"| |q#t s#t#q#Wn|js|j$n|t%|jRMRRqR:RRxtweak_identity_maptbindst extensionRt query_clstextt mapperortabletinsp((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR@sF}                      cCsiS(sA user-modifiable dictionary. The initial value of this dictioanry can be populated using the ``info`` argument to the :class:`.Session` constructor or :class:`.sessionmaker` constructor or factory methods. The dictionary here is always local to this :class:`.Session` and can be modified independently of all other :class:`.Session` objects. .. versionadded:: 0.9.0 ((R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs cCsd|jdk rH|s|r6|jjd||_q]tjdnt|d||_|jS(sBegin a transaction on this :class:`.Session`. If this Session is already within a transaction, either a plain transaction or nested transaction, an error is raised, unless ``subtransactions=True`` or ``nested=True`` is specified. The ``subtransactions=True`` flag indicates that this :meth:`~.Session.begin` can create a subtransaction if a transaction is already in progress. For documentation on subtransactions, please see :ref:`session_subtransactions`. The ``nested`` flag begins a SAVEPOINT transaction and is equivalent to calling :meth:`~.Session.begin_nested`. For documentation on SAVEPOINT transactions, please see :ref:`session_begin_nested`. R6sSA transaction is already begun. Use subtransactions=True to allow subtransactions.N(R~RROR8R9R(R>tsubtransactionsR6((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR{s   cCs|jdtS(sBegin a `nested` transaction on this Session. The target database(s) must support SQL SAVEPOINTs or a SQLAlchemy-supported vendor implementation of the idea. For documentation on SAVEPOINT transactions, please see :ref:`session_begin_nested`. R6(R{Rf(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRzs cCs#|jdkrn |jjdS(sRollback the current transaction in progress. If no transaction is in progress, this method is a pass-through. This method rolls back the current transaction or nested transaction regardless of subtransactions being in effect. All subtransactions up to the first real transaction are closed. Subtransactions occur when :meth:`.begin` is called multiple times. .. seealso:: :ref:`session_rollback` N(R~RR(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRscCsH|jdkr7|js%|jq7tjdn|jjdS(sFlush pending changes and commit the current transaction. If no transaction is in progress, this method raises an :exc:`~sqlalchemy.exc.InvalidRequestError`. By default, the :class:`.Session` also expires all database loaded state on all ORM-managed attributes after transaction commit. This so that subsequent operations load the most recent data from the database. This behavior can be disabled using the ``expire_on_commit=False`` option to :class:`.sessionmaker` or the :class:`.Session` constructor. If a subtransaction is in effect (which occurs when begin() is called multiple times), the subtransaction will be closed, and the next call to ``commit()`` will operate on the enclosing transaction. When using the :class:`.Session` in its default mode of ``autocommit=False``, a new transaction will be begun immediately after the commit, but note that the newly begun transaction does *not* use any connection resources until the first SQL is actually emitted. .. seealso:: :ref:`session_committing` sNo transaction is begun.N(R~RRR{R8R9R(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs   cCsH|jdkr7|js%|jq7tjdn|jjdS(sxPrepare the current transaction in progress for two phase commit. If no transaction is in progress, this method raises an :exc:`~sqlalchemy.exc.InvalidRequestError`. Only root transactions of two phase sessions can be prepared. If the current transaction is not such, an :exc:`~sqlalchemy.exc.InvalidRequestError` is raised. sNo transaction is begun.N(R~RRR{R8R9R(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR s   cKs:|dkr'|j|d||}n|j|d|S(sReturn a :class:`.Connection` object corresponding to this :class:`.Session` object's transactional state. If this :class:`.Session` is configured with ``autocommit=False``, either the :class:`.Connection` corresponding to the current transaction is returned, or if no transaction is in progress, a new one is begun and the :class:`.Connection` returned (note that no transactional state is established with the DBAPI until the first SQL statement is emitted). Alternatively, if this :class:`.Session` is configured with ``autocommit=True``, an ad-hoc :class:`.Connection` is returned using :meth:`.Engine.contextual_connect` on the underlying :class:`.Engine`. Ambiguity in multi-bind or unbound :class:`.Session` objects can be resolved through any of the optional keyword arguments. This ultimately makes usage of the :meth:`.get_bind` method for resolution. :param bind: Optional :class:`.Engine` to be used as the bind. If this engine is already involved in an ongoing transaction, that connection will be used. This argument takes precedence over ``mapper``, ``clause``. :param mapper: Optional :func:`.mapper` mapped class, used to identify the appropriate bind. This argument takes precedence over ``clause``. :param clause: A :class:`.ClauseElement` (i.e. :func:`~.sql.expression.select`, :func:`~.sql.expression.text`, etc.) which will be used to locate a bind, if a bind cannot otherwise be identified. :param close_with_result: Passed to :meth:`.Engine.connect`, indicating the :class:`.Connection` should be considered "single use", automatically closing when the first result set is closed. This flag only has an effect if this :class:`.Session` is configured with ``autocommit=True`` and does not already have a transaction in progress. :param \**kw: Additional keyword arguments are sent to :meth:`get_bind()`, allowing additional arguments to be passed to custom implementations of :meth:`get_bind`. tclausetclose_with_resultN(RRJRK(R>tmapperRRMRtkw((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRNs5  cKs0|jdk r|jj|S|j|SdS(N(R~RRKRw(R>RR&((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRKXscKs[tj|}|dkr6|j|d||}n|j|dtj||pWiS(sExecute a SQL expression construct or string statement within the current transaction. Returns a :class:`.ResultProxy` representing results of the statement execution, in the same manner as that of an :class:`.Engine` or :class:`.Connection`. E.g.:: result = session.execute( user_table.select().where(user_table.c.id == 5) ) :meth:`~.Session.execute` accepts any executable clause construct, such as :func:`~.sql.expression.select`, :func:`~.sql.expression.insert`, :func:`~.sql.expression.update`, :func:`~.sql.expression.delete`, and :func:`~.sql.expression.text`. Plain SQL strings can be passed as well, which in the case of :meth:`.Session.execute` only will be interpreted the same as if it were passed via a :func:`~.expression.text` construct. That is, the following usage:: result = session.execute( "SELECT * FROM user WHERE id=:param", {"param":5} ) is equivalent to:: from sqlalchemy import text result = session.execute( text("SELECT * FROM user WHERE id=:param"), {"param":5} ) The second positional argument to :meth:`.Session.execute` is an optional parameter set. Similar to that of :meth:`.Connection.execute`, whether this is passed as a single dictionary, or a list of dictionaries, determines whether the DBAPI cursor's ``execute()`` or ``executemany()`` is used to execute the statement. An INSERT construct may be invoked for a single row:: result = session.execute( users.insert(), {"id": 7, "name": "somename"}) or for multiple rows:: result = session.execute(users.insert(), [ {"id": 7, "name": "somename7"}, {"id": 8, "name": "somename8"}, {"id": 9, "name": "somename9"} ]) The statement is executed within the current transactional context of this :class:`.Session`. The :class:`.Connection` which is used to execute the statement can also be acquired directly by calling the :meth:`.Session.connection` method. Both methods use a rule-based resolution scheme in order to determine the :class:`.Connection`, which in the average case is derived directly from the "bind" of the :class:`.Session` itself, and in other cases can be based on the :func:`.mapper` and :class:`.Table` objects passed to the method; see the documentation for :meth:`.Session.get_bind` for a full description of this scheme. The :meth:`.Session.execute` method does *not* invoke autoflush. The :class:`.ResultProxy` returned by the :meth:`.Session.execute` method is returned with the "close_with_result" flag set to true; the significance of this flag is that if this :class:`.Session` is autocommitting and does not have a transaction-dedicated :class:`.Connection` available, a temporary :class:`.Connection` is established for the statement execution, which is closed (meaning, returned to the connection pool) when the :class:`.ResultProxy` has consumed all available data. This applies *only* when the :class:`.Session` is configured with autocommit=True and no transaction has been started. :param clause: An executable statement (i.e. an :class:`.Executable` expression such as :func:`.expression.select`) or string SQL statement to be executed. :param params: Optional dictionary, or list of dictionaries, containing bound parameter values. If a single dictionary, single-row execution occurs; if a list of dictionaries, an "executemany" will be invoked. The keys in each dictionary must correspond to parameter names present in the statement. :param mapper: Optional :func:`.mapper` or mapped class, used to identify the appropriate bind. This argument takes precedence over ``clause`` when locating a bind. See :meth:`.Session.get_bind` for more details. :param bind: Optional :class:`.Engine` to be used as the bind. If this engine is already involved in an ongoing transaction, that connection will be used. This argument takes precedence over ``mapper`` and ``clause`` when locating a bind. :param \**kw: Additional keyword arguments are sent to :meth:`.Session.get_bind()` to allow extensibility of "bind" schemes. .. seealso:: :ref:`sqlexpression_toplevel` - Tutorial on using Core SQL constructs. :ref:`connections_toplevel` - Further information on direct statement execution. :meth:`.Connection.execute` - core level statement execution method, which is :meth:`.Session.execute` ultimately uses in order to execute the statement. RRN(Rt_literal_as_textRRJRKRfR(R>RtparamsRRMR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR^s { c Ks(|j|d|d|d||jS(s:Like :meth:`~.Session.execute` but return a scalar result.RRRM(RR(R>RRRRMR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRscCsD|j|jdk r@x$|jjD]}|jq)WndS(s>Close this Session. This clears all items and ends any transaction in progress. If this session were created with ``autocommit=False``, a new transaction is immediately begun. Note that this new transaction does not use any connection resources until they are first needed. N(RR~RRPR(R>R~((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs cCsVx.|jjt|jD]}|jqW|j|_i|_i|_dS(sRemove all object instances from this ``Session``. This is equivalent to calling ``expunge(obj)`` on all objects in this ``Session``. N(RaRgtlistRRt_detachRRS(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs # cCsSt|trt|}n||j|jRRMR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs cCs||j|ttableRM((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs c Cs||kodknr>|jr,|jStjdn|dk rVt|pYd}|jr|r|j|jkr|j|jS|j|jkr|j|jSn|dk rx:tj |dt D] }||jkr|j|SqWqn|jr |jSt |t j jr/|jr/|jS|rK|jjrK|jjSg}|dk rq|jd|n|dk r|jdntjddj|dS(s< Return a "bind" to which this :class:`.Session` is bound. The "bind" is usually an instance of :class:`.Engine`, except in the case where the :class:`.Session` has been explicitly bound directly to a :class:`.Connection`. For a multiply-bound or unbound :class:`.Session`, the ``mapper`` or ``clause`` arguments are used to determine the appropriate bind to return. Note that the "mapper" argument is usually present when :meth:`.Session.get_bind` is called via an ORM operation such as a :meth:`.Session.query`, each individual INSERT/UPDATE/DELETE operation within a :meth:`.Session.flush`, call, etc. The order of resolution is: 1. if mapper given and session.binds is present, locate a bind based on mapper. 2. if clause given and session.binds is present, locate a bind based on :class:`.Table` objects found in the given clause present in session.binds. 3. if session.bind is present, return that. 4. if clause given, attempt to return a bind linked to the :class:`.MetaData` ultimately associated with the clause. 5. if mapper given, attempt to return a bind linked to the :class:`.MetaData` ultimately associated with the :class:`.Table` or other selectable to which the mapper is mapped. 6. No bind can be found, :exc:`~sqlalchemy.exc.UnboundExecutionError` is raised. :param mapper: Optional :func:`.mapper` mapped class or instance of :class:`.Mapper`. The bind can be derived from a :class:`.Mapper` first by consulting the "binds" map associated with this :class:`.Session`, and secondly by consulting the :class:`.MetaData` associated with the :class:`.Table` to which the :class:`.Mapper` is mapped for a bind. :param clause: A :class:`.ClauseElement` (i.e. :func:`~.sql.expression.select`, :func:`~.sql.expression.text`, etc.). If the ``mapper`` argument is not present or could not produce a bind, the given expression construct will be searched for a bound element, typically a :class:`.Table` associated with bound :class:`.MetaData`. slThis session is not bound to a single Engine or Connection, and no context was provided to locate a binding.t include_cruds mapper %ssSQL expressions8Could not locate a bind configured on %s or this Sessions, N(RRMR8tUnboundExecutionErrorR RRt mapped_tabletsql_utilt find_tablesRfRuRRt ClauseElementtappendtjoin(R>RRtc_mapperRtcontext((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRJ+s<4        cOs|j|||S(sTReturn a new :class:`.Query` object corresponding to this :class:`.Session`.(R(R>tentitiesR&((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRsccs$|j}t|_|V||_dS(sReturn a context manager that disables autoflush. e.g.:: with session.no_autoflush: some_object = SomeClass() session.add(some_object) # won't autoflush some_object.related_thing = session.query(SomeRelated).first() Operations that proceed within the ``with:`` block will not be subject to flushes occurring upon query access. This is useful when initializing a series of objects which involve existing database queries, where the uncompleted object should not yet be flushed. .. versionadded:: 0.7.6 N(RR(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt no_autoflushs  cCs[|jrW|j rWy|jWqWtjk rS}|jdtj|qWXndS(Nsraised as a result of Query-invoked autoflush; consider using a session.no_autoflush block if this flush is occurring prematurely(RRVRWR8tStatementErrort add_detailRtraise_from_cause(R>te((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt _autoflushsc Csytj|}Wn#tjk r8tj|nX|j||tj|jt ||j d|d|d|dkrt j dt|ndS(sXExpire and refresh the attributes on the given instance. A query will be issued to the database and all attributes will be refreshed with their current database value. Lazy-loaded relational attributes will remain lazily loaded, so that the instance-wide refresh operation will be followed immediately by the lazy load of that attribute. Eagerly-loaded relational attributes will eagerly load within the single refresh operation. Note that a highly isolated transaction will return the same values as were previously read in that same transaction, regardless of changes in database state outside of that transaction - usage of :meth:`~Session.refresh` usually only makes sense if non-ORM SQL statement were emitted in the ongoing transaction, or if autocommit mode is turned on. :param attribute_names: optional. An iterable collection of string attribute names indicating a subset of attributes to be refreshed. :param lockmode: Passed to the :class:`~sqlalchemy.orm.query.Query` as used by :meth:`~sqlalchemy.orm.query.Query.with_lockmode`. .. seealso:: :ref:`session_expire` - introductory material :meth:`.Session.expire` :meth:`.Session.expire_all` t refresh_statetlockmodetonly_load_propssCould not refresh instance '%s'N(Rtinstance_stateRtNO_STATEtUnmappedInstanceErrort _expire_stateRt load_on_identRR R_RR8R9R(R>R(tattribute_namesRR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs$cCs7x0|jjD]}|j|j|jjqWdS(sExpires all persistent instances within this Session. When any attributes on a persistent instance is next accessed, a query will be issued using the :class:`.Session` object's current transactional context in order to load all expired attributes for the given instance. Note that a highly isolated transaction will return the same values as were previously read in that same transaction, regardless of changes in database state outside of that transaction. To expire individual objects and individual attributes on those objects, use :meth:`Session.expire`. The :class:`.Session` object's default behavior is to expire all state whenever the :meth:`Session.rollback` or :meth:`Session.commit` methods are called, so that new state can be loaded for the new transaction. For this reason, calling :meth:`Session.expire_all` should not be needed when autocommit is ``False``, assuming the transaction is isolated. .. seealso:: :ref:`session_expire` - introductory material :meth:`.Session.expire` :meth:`.Session.refresh` N(RaRgRiRjRk(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRscCsMytj|}Wn#tjk r8tj|nX|j||dS(sExpire the attributes on an instance. Marks the attributes of an instance as out of date. When an expired attribute is next accessed, a query will be issued to the :class:`.Session` object's current transactional context in order to load all expired attributes for the given instance. Note that a highly isolated transaction will return the same values as were previously read in that same transaction, regardless of changes in database state outside of that transaction. To expire all objects in the :class:`.Session` simultaneously, use :meth:`Session.expire_all`. The :class:`.Session` object's default behavior is to expire all state whenever the :meth:`Session.rollback` or :meth:`Session.commit` methods are called, so that new state can be loaded for the new transaction. For this reason, calling :meth:`Session.expire` only makes sense for the specific case that a non-ORM SQL statement was emitted in the current transaction. :param instance: The instance to be refreshed. :param attribute_names: optional list of string attribute names indicating a subset of attributes to be expired. .. seealso:: :ref:`session_expire` - introductory material :meth:`.Session.expire` :meth:`.Session.refresh` N(RRRRRR(R>R(RR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs #cCs|j||r)|j|j|nUt|jjjd|}|j|x'|D]\}}}}|j|q[WdS(Nsrefresh-expire(t_validate_persistentt_expire_attributesRjRtmanagerRtcascade_iteratort_conditional_expire(R>RRtcascadedtotmtst_tdct_((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR8s  cCsU|jr%|j|j|jjn,||jkrQ|jj||jndS(s5Expire a state if persistent, else expunge if pendingN(R_RiRjRaRkRRtpopR(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyREs  s0.7sBThe non-weak-referencing identity map feature is no longer needed.cCs |jjS(sRemove unreferenced instances cached in the identity map. Note that this method is only meaningful if "weak_identity_map" is set to False. The default weak identity map is self-pruning. Removes any object in this Session's identity map that is not referenced in user code, modified, new or scheduled for deletion. Returns the number of objects pruned. (Ratprune(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRNs cCsytj|}Wn#tjk r8tj|nX|j|jk rgtjdt |nt |j j j d|}|j|x'|D]\}}}}|j|qWdS(sRemove the `instance` from this ``Session``. This will free all internal references to the instance. Cascading will be applied according to the *expunge* cascade rule. s*Instance %s is not present in this SessionRN(RRRRRRRR8R9RRRRRR^(R>R(RRRRRR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR]s cCs||jkr,|jj||jnd|jj|rn|jj||jj|d|jn"|jr|jjj|dndS(N( RRRRRatcontains_stateRbRSRR~(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR^ss   cCsx.|D]&}t|}|j}|dk r|j|}tj|dr]|j sptj|drtj dt |n|j dkr||_ ns|j |kr|j j |||jjkr|jj|d}n |j }||f|jj|<||_ n|j j|qqWtjjd|D|j |j|x0t|j|jD]}|jj|qwWdS(NisNInstance %s has a NULL identity key. If this is an auto-generated value, check that the database table allows generation of new primary key values, and that the mapped Column object is configured to expect these generated values. Ensure also that this flush() is not occurring at an inappropriate time, such aswithin a load() event.icss|]}||jfVqdS(N(Rj(t.0R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pys s(RtobjRt_identity_key_from_stateRtissubsettallow_partial_pkst issupersetRRRR_RaRbR~RURctstatelibt InstanceStatet_commit_all_statest_register_alteredR\t intersectionRRR(R>tstatesRRRt instance_keytorig_key((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt_register_newly_persistent~s6            cCs\|jrX|jrXxC|D]8}||jkrAt|jj|RR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs  cCsfx_|D]W}|jr2|jr2t|jj|RR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt_remove_newly_deleteds  cCsi|r|jr|jdnytj|}Wn#tjk rWtj|nX|j|dS(sPlace an object in the ``Session``. Its state will be persisted to the database on the next flush operation. Repeated calls to ``add()`` will be ignored. The opposite of ``add()`` is ``expunge()``. s Session.add()N(Rt_flush_warningRRRRRt_save_or_update_state(R>R(t_warnR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs cCsA|jr|jdnx!|D]}|j|dtq WdS(s:Add the given collection of instances to this ``Session``.sSession.add_all()R N(RRRR(R>t instancesR(((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs  cCs\|j|t|}x<|jd|d|jD]\}}}}|j|q5WdS(Ns save-updatethalt_on(t_save_or_update_implRRt_contains_state(R>RRRRRR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs   cCs|jr|jdnytj|}Wn#tjk rQtj|nX|jdkr}t j dt |n||j krdS|j |dtt|jjjd|}|j|j |<|jj|x'|D]\}}}}|j|qWdS(sfMark an instance as deleted. The database delete operation occurs upon ``flush()``. sSession.delete()sInstance '%s' is not persistedNtinclude_beforeR(RRRRRRRR_RR8R9RRSt_attachRfRRRRRRaRt _delete_impl(R>R(Rtcascade_statesRRRR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs& cCs|jr|jdni}|r2|jnt||j}z;t|_|jtj|tj |d|d|SWd||_XdS(sS Copy the state of a given instance into a corresponding instance within this :class:`.Session`. :meth:`.Session.merge` examines the primary key attributes of the source instance, and attempts to reconcile it with an instance of the same primary key in the session. If not found locally, it attempts to load the object from the database based on primary key, and if none can be located, creates a new instance. The state of each attribute on the source instance is then copied to the target instance. The resulting target instance is then returned by the method; the original source instance is left unmodified, and un-associated with the :class:`.Session` if not already. This operation cascades to associated instances if the association is mapped with ``cascade="merge"``. See :ref:`unitofwork_merging` for a detailed discussion of merging. :param instance: Instance to be merged. :param load: Boolean, when False, :meth:`.merge` switches into a "high performance" mode which causes it to forego emitting history events as well as all database access. This flag is used for cases such as transferring graphs of objects into a :class:`.Session` from a second level cache, or to transfer just-loaded objects into the :class:`.Session` owned by a worker thread or process without re-querying the database. The ``load=False`` use case adds the caveat that the given object has to be in a "clean" state, that is, has no pending changes to be flushed - even if the incoming object is detached from any :class:`.Session`. This is so that when the merge operation populates local attributes and cascades to related objects and collections, the values can be "stamped" onto the target object as is, without generating any history or attribute events, and without the need to reconcile the incoming data with any existing related objects or collections that might not be loaded. The resulting objects from ``load=False`` are always produced as "clean", so it is only appropriate that the given objects should be "clean" as well, else this suggests a mis-use of the method. sSession.merge()tloadt _recursiveN( RRRR RRt_mergeRRt instance_dict(R>R(RRR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs-      c Cst|}||kr ||St}|j}|dkre|sStjdn|j|}n||jkr|j|}n|s|jrtjdn|j j }t j |} || _|j | t}nYtj|d s|jr5tj|d r5|j|jj|d}nd}|dkr|j j }t j |} t j|} t}|j| nt j |} t j|} |||<|| k r|jdk ra|j|||jdt j} |j| | |jdt j} | t jk ra| t jk ra| | kratjd| t| | fqan|j| _|j | _ x3|j!D]%} | j"|||| | ||qWn|s| j#| |jn|r| j$j%j&| dn|S(Nsmerge() with load=False option does not support objects transient (i.e. unpersisted) objects. flush() all changes on mapped instances before merging with load=False.smerge() with load=False option does not support objects marked as 'dirty'. flush() all changes on mapped instances before merging with load=False.itpassivesVersion id '%s' on merged state %s does not match existing version '%s'. Leave the version attribute unset when merging to update the most recent version.('RRR_RR8R9RRaRht class_managert new_instanceRRReRfRRRRRtclass_tgetRRtversion_id_colt_get_state_attr_by_columntPASSIVE_NO_INITIALIZEtPASSIVE_NO_RESULTRtStaleDataErrorRt load_patht load_optionstiterate_propertiesRt _commit_allRR<R(R>Rt state_dictRRRRR_tmergedt merged_statet merged_dicttexisting_versiontmerged_versiontprop((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRQs           "           cCs2|jj|s.tjdt|ndS(Ns3Instance '%s' is not persistent within this Session(RaRR8R9R(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRscCs|jdk r+tjdt|n|j|||jkro|j|j|R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt _save_impls cCs|jj|r%||jkr%dS|jdkrPtjdt|n|jrutjdt|n|j ||jj |d|r|jj |n|jj ||j |dS(NsInstance '%s' is not persistedssInstance '%s' has been deleted. Use the make_transient() function to send this object back to the transient state.(RaRRSR_RR8R9RRdR+RRcRR(R>RRZ((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRes"  cCs0|jdkr|j|n |j|dS(N(R_RR.Re(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR scCs`||jkrdS|jdkr&dS|j|dt|j|j|<|jj|dS(NR(RSR_RRRfRRaR(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRscCs/tj|}|j|dtt|_dS(sAssociate an object with this :class:`.Session` for related object loading. .. warning:: :meth:`.enable_relationship_loading` exists to serve special use cases and is not recommended for general use. Accesses of attributes mapped with :func:`.relationship` will attempt to load a value from the database using this :class:`.Session` as the source of connectivity. The values will be loaded based on foreign key values present on this object - it follows that this functionality generally only works for many-to-one-relationships. The object will be attached to this session, but will **not** participate in any persistence operations; its state for almost all purposes will remain either "transient" or "detached", except for the case of relationship loading. Also note that backrefs will often not work as expected. Altering a relationship-bound attribute on the target object may not fire off a backref event, if the effective value is what was already loaded from a foreign-key-holding value. The :meth:`.Session.enable_relationship_loading` method is similar to the ``load_on_pending`` flag on :func:`.relationship`. Unlike that flag, :meth:`.Session.enable_relationship_loading` allows an object to remain transient while still being able to load related items. To make a transient object associated with a :class:`.Session` via :meth:`.Session.enable_relationship_loading` pending, add it to the :class:`.Session` using :meth:`.Session.add` normally. :meth:`.Session.enable_relationship_loading` does not improve behavior when the ORM is used normally - object references should be constructed at the object level, not at the foreign key level, so that they are present in an ordinary way before flush() proceeds. This method is not intended for general use. .. versionadded:: 0.8 .. seealso:: ``load_on_pending`` at :func:`.relationship` - this flag allows per-relationship loading of many-to-ones on items that are pending. RN(RRRRft _load_pending(R>RR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pytenable_relationship_loadings3cCs>|j|jkr:|jjr:|jj||jndS(N(RRR<t before_attachR(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR+%s c CsM|jrS|j|jkrS|jj| rStjdt||jfn|jr|j|jk r|jtkrtjdt||j|jfn|j|jkrI|r|j j r|j j ||j n|j|_|j r|j dkr|j |_ n|j jrI|j j||j qIndS(NsZCan't attach instance %s; another instance with key %s is already present in this session.s>Object '%s' is already attached to session '%s' (this is '%s')(R_RaRR8R9RRRRR<R1RRht _strong_objRt after_attach(R>RR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR*s,      cCsFytj|}Wn#tjk r8tj|nX|j|S(sReturn True if the instance is associated with this session. The instance may be pending or persistent within the Session for a result of True. (RRRRRR (R>R(R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyREs cCs,tt|jjt|jjS(sWIterate over all pending or persistent instances within this Session. (titerRRRRRa(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRRscCs||jkp|jj|S(N(RRRaR(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR ZscCsV|jrtjdn|jr+dSzt|_|j|Wdt|_XdS(sFlush all the object changes to the database. Writes out all pending object creations, deletions and modifications to the database as INSERTs, DELETEs, UPDATEs, etc. Operations are automatically ordered by the Session's unit of work dependency solver. Database operations will be issued in the current transactional context and do not affect the state of the transaction, unless an error occurs, in which case the entire transaction is rolled back. You may flush() as often as you like within a transaction to move changes from Python to the database's transaction buffer. For ``autocommit`` Sessions with no active manual transaction, flush() will create a transaction on the fly that surrounds the entire set of operations int the flush. :param objects: Optional; restricts the flush operation to operate only on elements that are in the given collection. This feature is for an extremely narrow set of use cases where particular objects may need to be operated upon before the full flush() occurs. It is not intended for general use. sSession is already flushingN(RVR8R9RRft_flushR(R>tobjects((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRW]s   cCstjd|dS(NsUsage of the '%s' operation is not currently supported within the execution stage of the flush process. Results may not be consistent. Consider using alternative event listeners or connection-level operations instead.(RR(R>tmethod((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRscCs"|jj o!|j o!|j S(N(Ratcheck_modifiedRSRR(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs c Cs/|j}| r8|j r8|j r8|jjjdSt|}|jjrr|jj||||j}nt |j}t |j}t |j |}|rt }x]|D]L}yt j |}Wn#t jk rt j|nX|j|qWnd}t } |rG|j|j|j |} n|j|j |} xL| D]D}t|j|o|j} |j|d| | j|qfW|r|j|j | } n|j | } x!| D]}|j|dtqW|jsdS|jdt|_} yt|_z|jWdt|_X|jj|||j | r|jjrt!|jj} t"j#j$g|jjD]}||j%f^qd|jt&j'd| n|jj(||| j)Wn*t&j*| j+dtWdQXnXdS(NtisdeleteRRsAttribute history events accumulated on %d previously clean instances within inner-flush event handlers have been reset, and will not result in database updates. Consider using set_committed_value() within inner-flush event handlers to avoid this warning.R(,t _dirty_statesRSRRRaRkRrRR<t before_flushR\t differenceRRRRRRRR]RRt _is_orphant has_identitytregister_objectRfthas_workR{R~RRRt after_flushtfinalize_flush_changesR,RRRRjRRtafter_flush_postexecRRR(R>R6tdirtyt flush_contextRdtnewtobjsetRRt processedtproct is_orphanR~tlen_((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR5sr       $        %    c Cst|}|jstS|j}x|jjD]o}| rNt|jds/t|jd rgq/n|jj||dtj \}}} |s| r/t Sq/WtSdS(s Return ``True`` if the given instance has locally modified attributes. This method retrieves the history for each instrumented attribute on the instance and performs a comparison of the current value to its previously committed value, if any. It is in effect a more expensive and accurate version of checking for the given instance in the :attr:`.Session.dirty` collection; a full test for each attribute's net "dirty" status is performed. E.g.:: return session.is_modified(someobject) .. versionchanged:: 0.8 When using SQLAlchemy 0.7 and earlier, the ``passive`` flag should **always** be explicitly set to ``True``, else SQL loads/autoflushes may proceed which can affect the modified state itself: ``session.is_modified(someobject, passive=True)``\ . In 0.8 and above, the behavior is corrected and this flag is ignored. A few caveats to this method apply: * Instances present in the :attr:`.Session.dirty` collection may report ``False`` when tested with this method. This is because the object may have received change events via attribute mutation, thus placing it in :attr:`.Session.dirty`, but ultimately the state is the same as that loaded from the database, resulting in no net change here. * Scalar attributes may not have recorded the previously set value when a new value was applied, if the attribute was not loaded, or was expired, at the time the new value was received - in these cases, the attribute is assumed to have a change, even if there is ultimately no net change against its database value. SQLAlchemy in most cases does not need the "old" value when a set event occurs, so it skips the expense of a SQL call if the old value isn't present, based on the assumption that an UPDATE of the scalar value is usually needed, and in those few cases where it isn't, is less expensive on average than issuing a defensive SELECT. The "old" value is fetched unconditionally upon set only if the attribute container has the ``active_history`` flag set to ``True``. This flag is set typically for primary key attributes and scalar object references that are not a simple many-to-one. To set this flag for any arbitrary mapped column, use the ``active_history`` argument with :func:`.column_property`. :param instance: mapped instance to be tested for pending changes. :param include_collections: Indicates if multivalued collections should be included in the operation. Setting this to ``False`` is a way to detect only local-column based properties (i.e. scalar columns or many-to-one foreign keys) that would result in an UPDATE for this instance upon flush. :param passive: .. versionchanged:: 0.8 Ignored for backwards compatibility. When using SQLAlchemy 0.7 and earlier, this flag should always be set to ``True``. tget_collectiont get_historyRN( RRhRRjRRthasattrtimplRMt NO_CHANGERf( R>R(tinclude_collectionsRRtdict_tattrtaddedt unchangedRd((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRsB    cCs|jo|jjS(s+ True if this :class:`.Session` is in "transaction mode" and is not in "partial rollback" state. The :class:`.Session` in its default mode of ``autocommit=False`` is essentially always in "transaction mode", in that a :class:`.SessionTransaction` is associated with it as soon as it is instantiated. This :class:`.SessionTransaction` is immediately replaced with a new one as soon as it is ended, due to a rollback, commit, or close operation. "Transaction mode" does *not* indicate whether or not actual database connection resources are in use; the :class:`.SessionTransaction` object coordinates among zero or more actual database transactions, and starts out with none, accumulating individual DBAPI connections as different data sources are used within its scope. The best way to track when a particular :class:`.Session` has actually begun to use DBAPI resources is to implement a listener using the :meth:`.SessionEvents.after_begin` method, which will deliver both the :class:`.Session` as well as the target :class:`.Connection` to a user-defined event listener. The "partial rollback" state refers to when an "inner" transaction, typically used during a flush, encounters an error and emits a rollback of the DBAPI connection. At this point, the :class:`.Session` is in "partial rollback" and awaits for the user to call :meth:`.Session.rollback`, in order to close out the transaction stack. It is in this "partial rollback" period that the :attr:`.is_active` flag returns False. After the call to :meth:`.Session.rollback`, the :class:`.SessionTransaction` is replaced with a new one and :attr:`.is_active` returns ``True`` again. When a :class:`.Session` is used in ``autocommit=True`` mode, the :class:`.SessionTransaction` is only instantiated within the scope of a flush call, or when :meth:`.Session.begin` is called. So :attr:`.is_active` will always be ``False`` outside of a flush or :meth:`.Session.begin` block in this mode, and will be ``True`` within the :meth:`.Session.begin` block as long as it doesn't enter "partial rollback" state. From all the above, it follows that the only purpose to this flag is for application frameworks that wish to detect is a "rollback" is necessary within a generic error handling routine, for :class:`.Session` objects that would otherwise be in "partial rollback" mode. In a typical integration case, this is also not necessary as it is standard practice to emit :meth:`.Session.rollback` unconditionally within the outermost exception catch. To track the transactional state of a :class:`.Session` fully, use event listeners, primarily the :meth:`.SessionEvents.after_begin`, :meth:`.SessionEvents.after_commit`, :meth:`.SessionEvents.after_rollback` and related events. (R~RA(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRAQs8cCs |jjS(sThe set of all persistent states considered dirty. This method returns all states that were modified including those that were possibly deleted. (RaR:(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR:scCs8tjg|jD]!}||jkr|j^qS(sZThe set of all persistent instances considered dirty. E.g.:: some_mapped_object in session.dirty Instances are considered dirty when they were modified but not deleted. Note that this 'dirty' calculation is 'optimistic'; most attribute-setting or collection modification operations will mark an instance as 'dirty' and place it in this set, even if there is no net change to the attribute's value. At flush time, the value of each attribute is compared to its previously saved value, and if there's no net change, no SQL operation will occur (this is a more expensive operation so it's only done at flush time). To check if an instance has actionable net changes to its attributes, use the :meth:`.Session.is_modified` method. (Rt IdentitySetR:RSR(R>R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRDs cCstjt|jjS(sDThe set of all instances marked as 'deleted' within this ``Session``(RRVRRSR(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRdscCstjt|jjS(sAThe set of all instances marked as 'new' within this ``Session``.(RRVRRRR(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRFs(s __contains__s__iter__saddsadd_allsbegins begin_nestedsclosescommits connectionsdeletesexecutesexpires expire_allsexpunges expunge_allsflushsget_binds is_modifiedsmergesquerysrefreshsrollbacksscalarN(IR)R*R+tpublic_methodsRRfRRtQueryR@tconnection_callableR~Rtmemoized_propertyRR{RzRRRRNRKRRRRRRRJRtcontextmanagerRRRRRRRt deprecatedRRR^RRRRRRRRRRR.ReR RR0R+RRRR RWRRR5RRARaR:RDRdRF(((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs    $  9     ^  4 ! )   3   ' Ab    7     &   g Y: cBsDeZdZdeeeeddZdZdZ dZ RS(s'A configurable :class:`.Session` factory. The :class:`.sessionmaker` factory generates new :class:`.Session` objects when called, creating them given the configurational arguments established here. e.g.:: # global scope Session = sessionmaker(autoflush=False) # later, in a local scope, create and use a session: sess = Session() Any keyword arguments sent to the constructor itself will override the "configured" keywords:: Session = sessionmaker() # bind an individual session to a connection sess = Session(bind=connection) The class also includes a method :meth:`.configure`, which can be used to specify additional keyword arguments to the factory, which will take effect for subsequent :class:`.Session` objects generated. This is usually used to associate one or more :class:`.Engine` objects with an existing :class:`.sessionmaker` factory before it is first used:: # application starts Session = sessionmaker() # ... later engine = create_engine('sqlite:///foo.db') Session.configure(bind=engine) sess = Session() .. seealso: :ref:`session_getting` - introductory text on creating sessions using :class:`.sessionmaker`. cKsi||d<||d<||d<||d<|dk rA||dRMRRRRqRR((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR@s       cKsxo|jjD]^\}}|dkr^d|kr^|j}|j|d||dtlocal_kwtktvtd((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt__call__& s   cKs|jj|dS(s(Re)configure the arguments for this sessionmaker. e.g.:: Session = sessionmaker() Session.configure(bind=create_engine('sqlite://')) N(RRs(R>tnew_kw((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt configure: s cCs9d|jj|jjdjd|jjDfS(Ns%s(class_=%r,%s)s, css%|]\}}d||fVqdS(s%s=%rN((RR`Ra((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pys I s(t __class__R)RRRR`(R>((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyt__repr__E s  N( R)R*R+RRRfRR@RcReRg(((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyRs-  '  cCsftj|}t|}|r1|j|n|jj|jrP|`n|jrb|`ndS(sMake the given instance 'transient'. This will remove its association with any session and additionally will remove its "identity key", such that it's as though the object were newly constructed, except retaining its values. It also resets the "deleted" flag on the state if this object had been explicitly deleted by its session. Attributes which were "expired" or deferred at the instance level are reverted to undefined, and will not trigger any loads. N(RRRR^t callablesRrR_Rd(R(RRm((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pytmake_transientM s     cCstj|}|js!|jr3tjdn|jj||_|jrZ|`n|j |j |j |j |j dS(sMake the given transient instance 'detached'. All attribute history on the given instance will be reset as though the instance were freshly loaded from a query. Missing attributes will be marked as expired. The primary key attributes of the object, which are required, will be made into the "key" of the instance. The object can then be added to a session, or merged possibly with the load=False flag, at which point it will look as if it were loaded that way, without emitting SQL. This is a special use case function that differs from a normal call to :meth:`.Session.merge` in that a given persistent state can be manufactured without any SQL calls. .. versionadded:: 0.9.5 .. seealso:: :func:`.make_transient` sGiven object must be transientN( RRRR_R8R9RRRdR#RjRtunloaded(R(R((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pytmake_transient_to_detachedj s   cCsAyttj|SWn#tjk r<tj|nXdS(szReturn the ``Session`` to which instance belongs. If the instance is not a mapped instance, an error is raised. N(RRRRRR(R(((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pyR' s(3R+RXtRRRRR8RRRRRRR t inspectionR tbaseR R R RRRRRt unitofworkRRRRt__all__tWeakValueDictionaryRRtobjectRtsymbolR.R/R0R1R2RRRRiRkR'tcounterR(((s\/var/www/send.findwatt.com/datamanager/lib/python2.7/site-packages/sqlalchemy/orm/session.pytsB ".:       #