Django Data Migration Reverse

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Mar 22, 2015. python migrate <app name> 0003. And then run your. UPDATE: To make the data migration reversible add the reverse_code argument:

Jul 23, 2014. This tutorial takes you deeper through the new Django migration system that. the first time you run migrations, Django will first check the database structure, It will undo/reverse all the migrations for the historical_data app.

Bear in mind that when reversed, this is actually adding a field to a model. This is generally the operation you would use to create data migrations, run custom.

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This document explains how to structure and write database migrations for different scenarios you might encounter. For introductory material on migrations, see.

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Aug 11, 2015. Make reverse data migrations. You can do this by passing 2 functions to migrations.RunPython(). For example, if you have migrations.

If I create a data migration, run it, then try to migrate back to before it, I get:. reveals RunPython can be handed a 2nd callable to do the "reverse" operation.