Running Python code as a migration operation in Django

This blog post was originally published on: https://jmplourde.com/til-django-run-python-migration-operation/

When I started learning Django, I was confused with the difference between makemigrations and migrate commands. I got it after a while, but I never truly had to work with complex migrations or write custome ones. I recently had to write a custom migration to change a ForeignKey field to a OneToOneField and I used the RunSQL special operation which allows to run raw sql queries. It allowed me to better understand …

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