63 lines
2.2 KiB
Python
63 lines
2.2 KiB
Python
# -*- coding: utf-8 -*-
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# Generated by Django 1.9.7 on 2016-08-01 14:54
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from __future__ import unicode_literals
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from django.db import migrations, models
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def migrate_groups_and_user_permissions(apps, schema_editor):
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"""
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This function migrates the database to the new groups logic:
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- Rename group 'Anonymous' (pk=1) to 'Default'
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- Rename group 'Registered users' (pk=2) to 'Previous group Registered'
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- Add all users who are not in any group to this group (pk=2)
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- Add all permissions of 'Previous group Registered' to all other groups (except 'Default')
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But only run this migration if:
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- there are groups in the database,
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- the name of the first group is 'Guests',
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- the name of the second group is 'Registered users'.
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"""
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# Disconnect autoupdate. We do not want to trigger it here.
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models.signals.post_save.disconnect(dispatch_uid='inform_changed_data_receiver')
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User = apps.get_model('users', 'User')
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Group = apps.get_model('auth', 'Group')
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try:
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group_default = Group.objects.get(pk=1)
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group_registered = Group.objects.get(pk=2)
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except Group.DoesNotExist:
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# One of the groups does not exist. Just do nothing.
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pass
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else:
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if group_default.name == 'Guests' and group_registered.name == 'Registered users':
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# Rename groups pk 1 and 2.
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group_default.name = 'Default'
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group_default.save()
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group_registered.name = 'Previous group Registered'
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group_registered.save()
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# Move users without groups to group pk 2.
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users = User.objects.all()
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for user in users:
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if not user.groups.exists():
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user.groups.add(group_registered)
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# Copy permissions of group pk 2 to all other groups except pk 1.
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groups = Group.objects.filter(pk__gt=2)
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for group in groups:
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for permission in group_registered.permissions.all():
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group.permissions.add(permission)
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class Migration(migrations.Migration):
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dependencies = [
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('users', '0003_user_number'),
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]
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operations = [
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migrations.RunPython(migrate_groups_and_user_permissions),
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]
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