django handwritten migrations altering auth -


i using django 1.8.1 , trying extend length of auth_user name field 1 of apps. before, south, target app underscore so:

db.alter_column('auth_group', 'name', models.charfield(max_length=120, null=false, blank=false))

however, in django 1.8, don't see way django putts app name in sql withing source code. don't want edit django source code have no way of changing that. current attemp here:

class migration(migrations.migration):  dependencies = [     ('auth', '0006_require_contenttypes_0002'), ]         operations = [     migrations.alterfield('auth_group', 'name', field=models.charfield(max_length=120, null=false, blank=false)), ]

please help. don't want edit django source code , want migrations.runsql last resort.

well, there tricky way that:

# -*- coding: utf-8 -*- django.db.migrations import migration djangomigration, alterfield django.db.models import charfield   class migration(djangomigration):     dependencies = [         # specify other dependencies, if required.         ('auth', '0006_require_contenttypes_0002')     ]     operations = [         alterfield(             model_name='user',             name='username',             field=charfield(max_length=120)         )     ]      def mutate_state(self, project_state, preserve=true):         """         workaround allows store ``auth``         migration outside directory should stored.         """         app_label = self.app_label         self.app_label = 'auth'         state = super(migration, self).mutate_state(project_state, preserve)         self.app_label = app_label         return state      def apply(self, project_state, schema_editor, collect_sql=false):         """         same workaround described in ``mutate_state`` method.         """         app_label = self.app_label         self.app_label = 'auth'         state = super(migration, self).apply(project_state, schema_editor, collect_sql)         self.app_label = app_label         return state

put in application's migrations folder proper name, e.g. 0001_alter_auth_user_username.py.

i'm not sure, however, approach.


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