Package gavo :: Package svcs :: Module standardcores :: Class DBCore

Class DBCore

                   object --+                    
                            |                    
 base.structure.StructureBase --+                
                                |                
                   object --+   |                
                            |   |                
           base.common.Parser --+                
                                |                
base.structure.ParseableStructure --+            
                                    |            
             base.structure.Structure --+        
                                        |        
                                core.Core --+    
                                            |    
                               TableBasedCore --+
                                                |
                                               DBCore

Known Subclasses:

A core performing database queries on one table or view.

DBCores ask the service for the desired output schema and adapt their output. The DBCore's output table, on the other hand, lists all fields available from the queried table.

Nested Classes
Inherited from `base.structure.StructureBase`: `__metaclass__`

Instance Methods

wantsTableWidget(self)

source code

getQueryCols(self, service, queryMeta)
returns the fields we need in the output table.

source code

run(self, service, inputTable, queryMeta)
does the DB query and returns an InMemoryTable containing the result.

source code

clearProperty(self, name)

source code

getFullId(self)

source code

getProperty(self, name, default=<Undefined>)

source code

hasProperty(self, name)

source code

resolveName(instance, context, id)

source code

setProperty(self, name, value)

source code

Inherited from TableBasedCore: adaptForRenderer, completeElement

Inherited from core.Core: __init__, __repr__, __str__, initialize, makeUserDoc

Inherited from base.structure.Structure: __provides__, callCompletedCallbacks, finishElement, onElementComplete, validate

Inherited from base.structure.ParseableStructure: end_, feed, feedFrom, feedObject, getAttribute, iterEvents, start_, value_

Inherited from base.structure.StructureBase: __providedBy__, adopt, breakCircles, change, copy, getAttributes, getCopyableAttributes, getSourcePosition, iterChildren, setPosition

Inherited from base.common.Parser: feedEvent

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __subclasshook__

Class Methods
Inherited from `base.structure.StructureBase`: `fromStructure`

Class Variables
	name_ = `'dbCore'` a sentinel for all kinds of undefined values.
	attrSeq = `[<gavo.base.complexattrs.StructListAttribute object>...`
	managedAttrs = `{'condDesc': <gavo.base.complexattrs.StructList...`
Inherited from `core.Core`: `inputTableXML`, `outputTableXML` Inherited from `base.structure.Structure`: `__implemented__` Inherited from `base.structure.StructureBase`: `completedCallbacks`

Properties
	rd
Inherited from `object`: `__class__`

Method Details

getQueryCols(self, service, queryMeta)

source code

returns the fields we need in the output table.

The normal DbBased core just returns whatever the service wants. Derived cores, e.g., for special protocols, could override this to make sure they have some fields in the result they depend on.

run(self, service, inputTable, queryMeta)

source code

does the DB query and returns an InMemoryTable containing the result.

Overrides: core.Core.run

Class Variable Details

attrSeq

Value:

[<gavo.base.complexattrs.StructListAttribute object>,
 <gavo.base.attrdef.BooleanAttribute object>,
 <gavo.base.attrdef.UnicodeAttribute object>,
 <gavo.base.parsecontext.IdAttribute object>,
 <gavo.base.complexattrs.StructAttribute object>,
 <gavo.base.attrdef.IntAttribute object>,
 <gavo.rscdef.common.NamePathAttribute object>,
 <gavo.base.parsecontext.OriginalAttribute object>,
...

managedAttrs

Value:

{'condDesc': <gavo.base.complexattrs.StructListAttribute object>,
 'condDescs': <gavo.base.complexattrs.StructListAttribute object>,
 'distinct': <gavo.base.attrdef.BooleanAttribute object>,
 'groupBy': <gavo.base.attrdef.UnicodeAttribute object>,
 'id': <gavo.base.parsecontext.IdAttribute object>,
 'inputTable': <gavo.base.complexattrs.StructAttribute object>,
 'limit': <gavo.base.attrdef.IntAttribute object>,
 'namePath': <gavo.rscdef.common.NamePathAttribute object>,
...

Property Details

rd

Get Method:: unreachable._getRD(self)