def obtainChoiceList( self, field ):
'''This method provides a hook that can be used to generate choice lists
for invid and string fields that provide such. String and Invid DBFields
will call their owner's obtainChoiceList() method to get a list of valid
choices.
This method will provide a reasonable default for targetted invid fields.
'''
if field.getID() != self.MEMBERS_FIELD_ID:
return BaseJythonEditObject.obtainChoiceList( self, field )
if self.membersChoice is None:
# we want to present a list of all users, mail groups besides this one,
# and external mail aliases (email addresses that have local aliases in
# ARL's mail system) as valid choices for the MEMBERS field.
# List all users
query1 = Query( SchemaConstants.UserBase, None, 0 )
# List all external email targets
query2 = Query( 275, None, 0 )
# List all other email groups, but not ourselves
root3 = QueryNotNode( QueryDataNode(-2, QueryDataNode.EQUALS, self.getInvid()) )
query3 = Query( 274, root3, 0 )
# We need a handle to the GSession to execute queries
gsession = self.editset.getSession().getGSession()
result = gsession.query(query1, self)
result.append( gsession.query(query2, self) )
result.append( gsession.query(query3, self) )
self.membersChoice = result
return self.membersChoice
