[Zapp-cvs-commit] ZApp ZApp_Specialist.py,1.32,1.33

[<ssp...@us...>]

Update of /cvsroot/zapp/ZApp
In directory sc8-pr-cvs1:/tmp/cvs-serv5312

Modified Files:
	ZApp_Specialist.py 
Log Message:
make CMF object a bit more flexible WRT attribute management

Index: ZApp_Specialist.py
===================================================================
RCS file: /cvsroot/zapp/ZApp/ZApp_Specialist.py,v
retrieving revision 1.32
retrieving revision 1.33
diff -C2 -d -r1.32 -r1.33
*** ZApp_Specialist.py	24 Nov 2003 21:57:47 -0000	1.32
--- ZApp_Specialist.py	8 Jan 2004 11:20:25 -0000	1.33
***************
*** 419,422 ****
--- 419,468 ----
          return self.defaultRack.getKlassAttr( attr, default )
  
+     def ZApp_getReferenceLookup(self):
+         """
+         return a lookup table for references by objects managed
+         by this specialist.
+ 
+         referenceLookup is an attribute of the specialist or the
+         class to a string, or a dictionary. If it's a string, it should be of the
+         form:
+ 
+            thisClassPropertyName:otherSpecialistName:otherClassPropertyName
+ 
+            e.g., if this specialist's class has a property personID, and
+            the "People" specialist uses 'personID' as a primary key you
+            would establish the relationship with a line in referenceLookup
+            as:
+ 
+            personID:People:personID
+ 
+         This permits the backend lever to qualify the schema with 'references xxxx'
+         clauses so that the backend can enforce referential integrity automatically.
+         (in addition to whatever enforcement is already done by ZPatterns/triggers).
+         
+         """
+         missing = []
+         
+         refLookup = getattr(self, 'ZApp_referenceLookup', missing)
+         
+         if refLookup is missing:
+             refLookup = self.ZApp_getItemClassAttr('ZApp_referenceLookup', {})
+ 
+         if hasattr( refLookup, 'func_code' ) or hasattr( refLookup, '__call__'):
+             refLookup = refLookup()
+ 
+         if type(refLookup) == type(''):
+             refLookup = refLookup.split('\n')
+             
+         if type(refLookup) == type([]):
+             result = {}
+             for item in refLookup:
+                 if type(refLookup) == type(''):
+                     rList = refLookup.split(':')
+                     if len(rList) >= 3:
+                         result[ rList[0] ] = [ rList[1], rList[2] ]
+             refLookup = result
+ 
+         return refLookup
  
      def ZApp_printDebugMessage(self, message, priority=INFO):