In this episode, we’re remodeling! I changed the model relationship between GradeLevel and Course from a ForeignKey (1 to many) to a ManyToManyField. We talked through the change and started fixing all the tests that broke. After explaining the change that I wanted to make and why I want to make it, I explained how a foreign key and many to many relationship at the database level. Once we had the conceptual foundation in place, I started with the documentation.
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