Missing validation of child models

[Vlastimil Zíma]

In Django1.1 validation of models does not report when child model has declared field with same name as one to one field that links parent model and child model.

For example:

class Parent(models.Model)
  pass

class Child(Parent)
  child = models.CharField()

raises ValueError when I want to set string value for field 'child', because

Parent.child == Child.parent.child == Child.child #OneToOneField(Child) instead CharField which is replaced

[niall]

Duplicate of #14217