Fix migrating old databases not containing certain metadata.
Review Request #7779 — Created Nov. 23, 2015 and submitted
Older databases don't have things like index_together stored in the schema, which django-evolution looks for these days. This could cause breakages when upgrading older databases. We now fall back to defaults if these don't exist.
Unit tests pass.
I was able to upgrade some very old databases.
Tool: Pyflakes Processed Files: django_evolution/db/common.py django_evolution/mutators.py Tool: PEP8 Style Checker Processed Files: django_evolution/db/common.py django_evolution/mutators.py