On Apr 6, 2007, at 5:39 AM, svilen wrote:
> >> seems this is the month of the many2many relations ;-) > more on the theme: many2many > > i have a association of 3 tables, A,B,C. > one of them (C) may not be present in all assoc_items. > So that column has nullable=True. > > The problem is: adding associations to A-objects and saving them > works; but retrieving omits those records which do not have 3rd item. > > The generated sql query is ok, executing it manualy gives proper > results. > > is there some additional logic/filtering in the relation (in > Instrumentedlist/loader) that does this, or am i missing something, > or this is bug (and u want a testcase) ? when you say, "association of 3 tables, A,B, C", do you mean, there is a table "D" that contains a reference to all of A, B, C ? if thats the case, and D's reference columns to A, B, and C comprise a primary key, SA's default behavior when it sees a composite primary key of "3, 4, NULL" is to determine that the row does not represent an entity. use the flag "allow_null_pks=True" on your mapper() to have such a primary key be counted. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
