Fixed #2608 -- Generate correct SQL for multi-level foreign key relations.

Based on a patch from Gopal Narayanan.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@5106 bcc190cf-cafb-0310-a4f2-bffc1f526a37

AUTHORS

@@ -164,6 +164,7 @@ answer newbie questions, and generally made Django that much better:
     Robin Munn <http://www.geekforgod.com/>
     Robert Myers <myer0052@gmail.com>
     Nebojša Dorđević
+    Gopal Narayanan <gopastro@gmail.com>
     Fraser Nevett <mail@nevett.org>
     Sam Newman <http://www.magpiebrain.com/>
     Neal Norwitz <nnorwitz@google.com>

django/core/management.py

@@ -168,6 +168,8 @@ def _get_sql_model_create(model, known_models=set()):
     for f in opts.fields:
         if isinstance(f, (models.ForeignKey, models.OneToOneField)):
             rel_field = f.rel.get_related_field()
+            while isinstance(rel_field, (models.ForeignKey, models.OneToOneField)):
+                rel_field = rel_field.rel.get_related_field()
             data_type = get_rel_data_type(rel_field)
         else:
             rel_field = f