Modeling.DatabaseAdaptors.PostgresqlAdaptorLayer.PostgresqlAdaptorChannel.PostgresqlAdaptorChannel

Package Modeling :: Package DatabaseAdaptors :: Package PostgresqlAdaptorLayer :: Module PostgresqlAdaptorChannel :: Class PostgresqlAdaptorChannel

[show private | hide private]

[frames | no frames]

Class PostgresqlAdaptorChannel

          AdaptorChannel --+    
                           |    
AbstractDBAPI2AdaptorChannel --+
                               |
                              PostgresqlAdaptorChannel

Concrete AdaptorChannel for Postgresql [module psycopg or pgdb]

Method Summary
	`primaryKeysForNewRowsWithEntity(self, count, anEntity)` Generates and returns a list of dictionaries, whose keys are PK attributes' names and values the corresponding PK value.
Inherited from AbstractDBAPI2AdaptorChannel
	`__init__(self, anAdaptorContext)` See Modeling.interfaces.AdaptorChannel for details
	`__unimplemented__(self)`
	`attributesToFetch(self)` See Modeling.interfaces.AdaptorChannel for details
	`cancelFetch(self)` See Modeling.interfaces.AdaptorChannel for details
	`closeChannel(self)` See Modeling.interfaces.AdaptorChannel for details
	`dbAPI_cursor(self)`
	`deleteRowsDescribedByQualifier(self, aQualifier, anEntity)` Builds the DELETE SQLExpression for 'aQualifier' and 'anEntity' ans executes it.
	`describeModelWithTableNames(self, tableNames)` See Modeling.interfaces.AdaptorChannel for details
	`describeResults(self)` See Modeling.interfaces.AdaptorChannel for details
	`describeStoredProcedureNames(self)` See Modeling.interfaces.AdaptorChannel for details
	`describeTableNames(self)` See Modeling.interfaces.AdaptorChannel for details
	`evaluateExpression(self, anSQLexpression)` See Modeling.interfaces.AdaptorChannel for details
	`executeStoredProcedure(self, aStoredProcedure, values)` See Modeling.interfaces.AdaptorChannel for details
	`fetchRow(self)` See Modeling.interfaces.AdaptorChannel for details
	`insertRow(self, row, anEntity)` See Modeling.interfaces.AdaptorChannel for details
	`isFetchInProgress(self)` See Modeling.interfaces.AdaptorChannel for details
	`isOpen(self)` See Modeling.interfaces.AdaptorChannel for details
	`openChannel(self)` See Modeling.interfaces.AdaptorChannel for details
	`returnValuesForLastStoredProcedureInvocation(self)` See Modeling.interfaces.AdaptorChannel for details
	`rowCountForSelectAttributes(self, attributes, aFetchSpecification, shouldLock, anEntity)` Implemented by concrete adaptors to return the number of rows that would be fetched if selectAttributes() is called with the same arguments.
	`selectAttributes(self, attributes, aFetchSpecification, shouldLock, anEntity)` See Modeling.interfaces.AdaptorChannel for details
	`setAttributesToFetch(self, attributes)` See Modeling.interfaces.AdaptorChannel for details
	`updateValuesInRowsDescribedByQualifier(self, row, aQualifier, anEntity)` Builds the UPDATE SQLExpression for 'row', 'aQualifier' and 'anEntity' and executes it.
Inherited from AdaptorChannel
	`adaptorContext(self)` See interfaces.AdaptorChannel for details
	`addStoredProceduresNamed(self, storedProcedureNames, aModel)` See interfaces.AdaptorChannel for details
	`delegate(self)` See interfaces.AdaptorChannel for details
	`deleteRowDescribedByQualifier(self, aQualifier, anEntity)` Calls 'deleteRowsDescribedByQualifier()' on itself and make sure that one and only one row was deleted.
	`dictionaryWithObjectsForAttributes(self, objects, attributes)` See interfaces.AdaptorChannel for details
	`lockRowComparingAttributes(self, atts, anEntity, aQualifier, snapshot)` See interfaces.AdaptorChannel for details
	`performAdaptorOperation(self, anAdaptorOperation)` Examines 'anAdaptorOperation' and executes the corresponding method.
	`performAdaptorOperations(self, adaptorOperations)` Iterates on each item in 'adaptorOperations' and calls 'performAdaptorOperation()' with that item as a parameter.
	`setDelegate(self, aDelegate)` See interfaces.AdaptorChannel for details
	`updateValuesInRowDescribedByQualifier(self, row, aQualifier, anEntity)` Calls 'updateValuesInRowsDescribedByQualifier' on itself and make sure that one and only one row was updated.

Class Variable Summary
`int`	`_count_for_execute` = 0
Inherited from AbstractDBAPI2AdaptorChannel
`tuple`	`__implements__` = `(<class Modeling.interfaces.AdaptorChan...`

Method Details

primaryKeysForNewRowsWithEntity(self, count, anEntity)

Generates and returns a list of dictionaries, whose keys are PK attributes' names and values the corresponding PK value. This implementation executes the following SQL statement:

SELECT NEXTVAL('PK_SEQ_<entity.primaryKeyRootName()>')

If 'anEntity' defines more than one PK (compound primary key), returns an empty list.

Parameters:

count -- the number of primary keys to generate

anEntity -- the entity for which PKs are generated

See also:: PostgresqlSchemaGeneration.primaryKeySupportStatementsForEntityGroup() PostgresqlSchemaGeneration.dropPrimaryKeySupportStatementsForEntityGroup() Modeling.AdaptorChannel.primaryKeysForNewRowsWithEntity()

Overrides:: Modeling.DatabaseAdaptors.AbstractDBAPI2AdaptorLayer.AbstractDBAPI2AdaptorChannel.AbstractDBAPI2AdaptorChannel.primaryKeysForNewRowsWithEntity

Class Variable Details

_count_for_execute

Type:: int
Value:: 0

Generated by Epydoc 2.1 on Sat Mar 4 13:36:27 2006

http://epydoc.sf.net