Generally this happens when you don't apply the initial migration. Have you run 'python manage.py migrate' (assuming Django >= 1.7 since you mentioned making migrations) and if you have, what was the output? If you aren't sure, run it again as it shouldn't hurt anything.
Check your database and make sure that the tables actually exist. If not, and there is no production data (assuming not based on the question), drop and recreate the DB to clear out any previously failed migration attempts and apply your migrations again using the command I specified. Capture the entire output of the command and paste it back to this list so that we can help more.
-James
--Hello, I have manage to merge mine application to pythonanywhere.com. After I have done all the needed installing, uploading files, collecting static, making migrations to mine django application, I have experienced an OperationError saying:
You can find the rest of mine question here on stackoverflow, Can someone help me over come this error, tank you.
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