![]() When the migrate -fake-initial option is used, these initial It has no dependencies on any other migration in the same app). Will be considered “initial” if it is the first migration in the app (i.e. If an initial class attribute isn’t found, a migration Initial migrations are marked with an initial = True class attribute on the Usually an app will have one initial migration,īut in some cases of complex model interdependencies it may have two or more. The “initial migrations” for an app are the migrations that create the first More complex operations are not autodetectable and are only available viaĪ hand-written migration, so don’t be scared about editing them if you have to. It’s entirely possible to write them manually if you need to. You should rarely, if ever, need to edit migration files by hand, but Then uses these models to compare against the ones in your models.py files ![]() Up with the state of your models last time you ran makemigrations. Through all the changes, in order, on an in-memory set of models to come That in-memory structure is also used to work out what the differences areīetween your models and the current state of your migrations Django runs Django scans them andīuilds an in-memory representation of all of the schema changes to all apps,Īnd uses this to generate the SQL which makes the schema changes. Tell Django what schema changes need to be made. The operations are the key they are a set of declarative instructions which
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