Method Migration

django/db/migrations/recorder.py:25–46

Lazy load to avoid AppRegistryNotReady if installed apps import MigrationRecorder.

(cls)

    @classproperty
    def Migration(cls):
        """
        Lazy load to avoid AppRegistryNotReady if installed apps import
        MigrationRecorder.
        """
        if cls._migration_class is None:

            class Migration(models.Model):
                app = models.CharField(max_length=255)
                name = models.CharField(max_length=255)
                applied = models.DateTimeField(default=now)

                class Meta:
                    apps = Apps()
                    app_label = "migrations"
                    db_table = "django_migrations"

                def __str__(self):
                    return "Migration %s for %s" % (self.name, self.app)

            cls._migration_class = Migration
        return cls._migration_class

    def __init__(self, connection):
        self.connection = connection