id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
27089	commands/makemigrations.py runs MigrationLoader.check_consistent_history() for all database connections	Alexander Holmbäck	nobody	"In the file django/core/management/commands/makemigrations.py (line 97-100), an instance of MigrationLoader (loader) checks consistency on every database connection defined in settings.py.

{{{
for db in connection:
    connection = connection[db]
    if connection.settings_dict['ENGINE'] != 'django.db.backends.dummy':
        loader.check_consistent_history(connection)
}}}

The loader will then raise an InconsistentMigrationHistory exception for a connection whose migrations is not applied consistently, even if it's not to participate in the migration process.

I didn't expect `makemigrations` would check connections that isn't to be migrated. Also, the error message ""Migration xxx is applied before its dependency xxx"" (line 285 in db/migrations/loader.py) didn't indicate checked connection.

A more intuitive behavior would be to check only the connection that is to be migrated, or, if that isn't possible, include connection name in the error message."	Bug	new	Migrations	1.10	Normal				Unreviewed	0	0	0	0	0	0