text: # encoding: utf-8
  import datetime
  from south.db import db
  from south.v2 import SchemaMigration
  from django.db import models
  
  class Migration(SchemaMigration):
  
      def forwards(self, orm):
          
          # Adding field 'MessageLog.parent_id'
          db.add_column('message_log_messagelog', 'parent_id', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['message_log.MessageLog'], null=True, blank=True), keep_default=False)
  
  
      def backwards(self, orm):
          
          # Deleting field 'MessageLog.parent_id'
          db.delete_column('message_log_messagelog', 'parent_id_id')
  
  
      models = {
          'contenttypes.contenttype': {
              'Meta': {'ordering': "('name',)", 'unique_together': "(('app_label', 'model'),)", 'object_name': 'ContentType', 'db_table': "'django_content_type'"},
              'app_label': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
              'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
              'model': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
              'name': ('django.db.models.fields.CharField', [], {'max_length': '100'})
          },
          'message_log.messagelog': {
              'Meta': {'ordering': "('created_at',)", 'object_name': 'MessageLog'},
              'content_type': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'message_logs_instance'", 'to': "orm['contenttypes.ContentType']"}),
              'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'db_index': 'True', 'blank': 'True'}),
              'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
              'initiator_content_type': ('django.db.models.fields.related.ForeignKey', [], {'blank': 'True', 'related_name': "'message_logs_initiator'", 'null': 'True', 'to': "orm['contenttypes.ContentType']"}),
              'initiator_object_id': ('django.db.models.fields.PositiveIntegerField', [], {'db_index': 'True', 'null': 'True', 'blank': 'True'}),
              'message': ('django.db.models.fields.CharField', [], {'max_length': '32'}),
              'message_params': ('django.db.models.fields.TextField', [], {}),
              'object_id': ('django.db.models.fields.PositiveIntegerField', [], {'db_index': 'True'}),
              'parent_id': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['message_log.MessageLog']", 'null': 'True', 'blank': 'True'}),
              'revision_after': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'pre_message'", 'null': 'True', 'to': "orm['revision.Revision']"}),
              'revision_before': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'post_message'", 'null': 'True', 'to': "orm['revision.Revision']"}),
              'workflow_id': ('django.db.models.fields.CharField', [], {'default': "''", 'max_length': '64', 'db_index': 'True'})
          },
          'revision.revision': {
              'Meta': {'unique_together': "[('object_id', 'content_type', 'revision')]", 'object_name': 'Revision'},
              'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['contenttypes.ContentType']"}),
              'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'db_index': 'True', 'blank': 'True'}),
              'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
              'message_log_record': ('django.db.models.fields.related.ForeignKey', [], {'blank': 'True', 'related_name': "'affected_revisions'", 'null': 'True', 'to': "orm['message_log.MessageLog']"}),
              'object_id': ('django.db.models.fields.PositiveIntegerField', [], {'db_index': 'True'}),
              'revision': ('django.db.models.fields.PositiveIntegerField', [], {'db_index': 'True'}),
              'serialized_fields': ('django.db.models.fields.TextField', [], {})
          }
      }
  
      complete_apps = ['message_log']
  