Django squash migrations.

Django squash migrations 7 we got built in migrations and a management command to squash a set of existing migrations into one optimized migration - for faster test database building and to remove some legacy code/history. It then inspects this object for four attributes, only two of which are used most of the time: dependencies, a list of migrations this one depends on. I wrote a blog post to introduce it, but if you want to dive straight to the code, here is the repo: I’m not expecting it to cover all use cases, and it has some caveats (read the post or the documentation) but hopefully it can work for others. BadMigrationError: Migration aaaa in app sales has no Migration class; モジュール分割を行う場合、配置するディレクトリには気をつけてください。 Migrationクラス. Migration 的子类，称为 Migration 。然后，它将检查此对象的四个属性，大多数情况下仅使用其中两个： dependencies ，所依赖的迁移列表。 operations ，定义了此次迁移操作的 Operation 类的列表。 Usually this will be enough, but from time to time you may need to ensure that your migration runs before other migrations. They’re designed to be mostly automatic, but you’ll need to know when to make migrations, when to run them, and the common problems you might run into. Dec 6, 2018 · django. Django provides great tools for managing migrations, but squashing migrations in a production SaaS project can be a bit scary 😱. This is useful, for example, to make third-party apps’ migrations run after your AUTH_USER_MODEL replacement. The application included hundreds of database migrations, many of which depended on legacy packages and deprecated functionality that blocked upgrading Django and Python. urhv tirxybt hvfb ciuub qoo ehsspr gueh epmfn bcjif dlxpb idkav ihnj gcntae dnr jmr