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# this file derive from django-tenant-schemas
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# Author: Bernardo Pires Carneiro
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# Email: carneiro.be@gmail.com
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# License: MIT license
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# Home-page: http://github.com/bcarneiro/django-tenant-schemas
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from django.conf import settings
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from django.db import connection
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from south import migration
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from south.migration.base import Migrations
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from south.management.commands.migrate import Command as MigrateCommand
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from entrouvert.djommon.multitenant.middleware import TenantMiddleware
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from entrouvert.djommon.multitenant.management.commands import SyncCommon
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class Command(SyncCommon):
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help = "Migrate schemas with South"
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option_list = MigrateCommand.option_list + SyncCommon.option_list
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def handle(self, *args, **options):
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super(Command, self).handle(*args, **options)
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if self.sync_public:
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self.migrate_public_apps()
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if self.sync_tenant:
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self.migrate_tenant_apps(self.schema_name)
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def _set_managed_apps(self, included_apps, excluded_apps):
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""" while sync_schemas works by setting which apps are managed, on south we set which apps should be ignored """
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ignored_apps = []
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if excluded_apps:
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for item in excluded_apps:
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if item not in included_apps:
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ignored_apps.append(item)
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for app in ignored_apps:
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app_label = app.split('.')[-1]
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settings.SOUTH_MIGRATION_MODULES[app_label] = 'ignore'
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def _save_south_settings(self):
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self._old_south_modules = None
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if hasattr(settings, "SOUTH_MIGRATION_MODULES") and settings.SOUTH_MIGRATION_MODULES is not None:
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self._old_south_modules = settings.SOUTH_MIGRATION_MODULES.copy()
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else:
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settings.SOUTH_MIGRATION_MODULES = dict()
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def _restore_south_settings(self):
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settings.SOUTH_MIGRATION_MODULES = self._old_south_modules
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def _clear_south_cache(self):
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for mig in list(migration.all_migrations()):
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delattr(mig._application, "migrations")
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Migrations._clear_cache()
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def _migrate_schema(self, tenant):
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connection.set_tenant(tenant, include_public=False)
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MigrateCommand().execute(*self.args, **self.options)
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def migrate_tenant_apps(self, schema_name=None):
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self._save_south_settings()
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apps = self.tenant_apps or self.installed_apps
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self._set_managed_apps(included_apps=apps, excluded_apps=self.shared_apps)
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if schema_name:
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self._notice("=== Running migrate for schema: %s" % schema_name)
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connection.set_schema_to_public()
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tenant = TenantMiddleware.get_tenant_by_hostname(schema_name)
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self._migrate_schema(tenant)
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else:
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all_tenants = TenantMiddleware.get_tenants()
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if not all_tenants:
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self._notice("No tenants found")
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for tenant in all_tenants:
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Migrations._dependencies_done = False # very important, the dependencies need to be purged from cache
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self._notice("=== Running migrate for schema %s" % tenant.schema_name)
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self._migrate_schema(tenant)
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self._restore_south_settings()
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def migrate_public_apps(self):
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self._save_south_settings()
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apps = self.shared_apps or self.installed_apps
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self._set_managed_apps(included_apps=apps, excluded_apps=self.tenant_apps)
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self._notice("=== Running migrate for schema public")
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MigrateCommand().execute(*self.args, **self.options)
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self._clear_south_cache()
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self._restore_south_settings()
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