How do I Migrate Django Models Between Apps with Django 1.7?

Migrating Django Models Between Apps with Django 1.7

In Django projects, it's common to find that models initially placed in a single app should be moved to separate apps for improved structure. While previously challenging due to foreign key constraints, Django 1.7's support for migrations provides a more streamlined approach.

To move a model from an old app to a new app:

1. Remove from the Old App:

• Create an empty migration for the old app.
• In the migration file, use AlterModelTable to rename the table and DeleteModel to remove the model from the old app's history.
• Wrap these operations in a SeparateDatabaseAndState operation.

2. Add to the New App:

• Copy the model to the new app's model file.
• Create a migration for the new app with a naive CreateModel operation.
• Wrap this operation in a SeparateDatabaseAndState operation that references the migration from step 1 as a dependency.

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