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Changes between Version 18 and Version 19 of ModelInheritance

-              v18
+              v19
 Thus, there is simply no 'name' field for it to inherit.  So, we need to have ModelBase walk through the parent classes and call contribute_to_class on each of the fields found in _meta.fields.  As we walk the inheritance tree, we look for a '_meta' attribute to determine if our current node is a Model.  Otherwise, it is either a mixin class or the Model class iteself.
+We can keep track of the parent hierarchy by creating _meta.parents, and having each ancestor of Model add to it in a recursive fasion, by adding the following to  ModelBase.__new__():
+{{{
+        new_class._meta.parents = bases
+        for base in bases:
+            if '_meta' in dir(base):
+                new_class._meta.parents.extend(base._meta.parents)
+}}}