[Modeling-users] possible bug with autorelationships

[Lorenzo G. S. <lg...@si...>]

Hi,

I have a Person entity and I'm trying to define a relationship between
two persons. Something like the husband/wife relationship. So far it
works, the problem is when other classes appear in the inheritance tree.

I have a Customer entity which is-a Person, which is-a BaseType. This is
how my PyModel looks like:

from Modeling.PyModel import *

Entity.defaults['properties'] = [
    APrimaryKey('id', isClassProperty=0, isRequired=1, doc='PK')
    ]

_connDict = {'database': 'pruebas_modeling.sqlite'}

model = Model('Pruebas', adaptorName='SQLite', connDict=_connDict,
              version='0.1')

model.entities = [
    Entity('BaseType',
           properties=[AFloat('oid', doc='Internal object identifier')]
           ),
                       
    Entity('Person',
           properties=[AString('name'),
                       AString('surname'),
                       ADateTime('birthdate'),
                       AInteger('employed', defaultValue=1),
                       RToOne('husband', destination='Person',
inverse='wife'),
                       RToOne('wife', destination='Person',
inverse='husband')],
           parent='BaseType',
           ),
    Entity('Customer',
           properties=[AFloat('salary')],
           parent='Person',
           ),
    ]

model.build()

------------------------------------------------------

If I run that code I get this exception:
Traceback (most recent call last):
  File "prueba_autorrelacion.py", line 32, in ?
    model.build()
  File "/opt/lib/python2.3/site-packages/Modeling/PyModel.py", line 228,
in build
    entity.build_toOne_relationships(self)
  File "/opt/lib/python2.3/site-packages/Modeling/PyModel.py", line 446,
in build_toOne_relationships
    prop.build(model, self)
  File "/opt/lib/python2.3/site-packages/Modeling/PyModel.py", line 701,
in build
    entity.forward_rel_info(self, model)
  File "/opt/lib/python2.3/site-packages/Modeling/PyModel.py", line 437,
in forward_rel_info
    rel.dst,invr.src=check_or_make_equal(rel.dst,invr.src)
  File "/opt/lib/python2.3/site-packages/Modeling/PyModel.py", line 421,
in check_or_make_equal
    assert x == y
AssertionError


There are several ways to get rid of the exception:

- Remove the Customer entity
- Make the Person entity don't inherit from BaseType
- Remove the BaseType entity

Obviously none of those is what I want so I wonder if anyone in the list
knows why my relations are messing the inheritance or viceversa.

Thanks

Lorenzo Gil Sanchez