new_contents: # -*- coding: utf-8 -*-
  from south.utils import datetime_utils as datetime
  from south.db import db
  from south.v2 import SchemaMigration
  from django.db import models
  
  
  class Migration(SchemaMigration):
  
      def forwards(self, orm):
  
          # Changing field 'HostMaintenance.finished_at'
          db.alter_column(u'maintenance_hostmaintenance', 'finished_at', self.gf('django.db.models.fields.DateTimeField')(null=True))
  
          # Changing field 'HostMaintenance.started_at'
          db.alter_column(u'maintenance_hostmaintenance', 'started_at', self.gf('django.db.models.fields.DateTimeField')(null=True))
  
          # Changing field 'HostMaintenance.main_log'
          db.alter_column(u'maintenance_hostmaintenance', 'main_log', self.gf('django.db.models.fields.TextField')(null=True))
  
      def backwards(self, orm):
  
          # Changing field 'HostMaintenance.finished_at'
          db.alter_column(u'maintenance_hostmaintenance', 'finished_at', self.gf('django.db.models.fields.DateTimeField')(default=None))
  
          # Changing field 'HostMaintenance.started_at'
          db.alter_column(u'maintenance_hostmaintenance', 'started_at', self.gf('django.db.models.fields.DateTimeField')(default=None))
  
          # Changing field 'HostMaintenance.main_log'
          db.alter_column(u'maintenance_hostmaintenance', 'main_log', self.gf('django.db.models.fields.TextField')(default=None))
  
      models = {
          u'maintenance.hostmaintenance': {
              'Meta': {'object_name': 'HostMaintenance'},
              'check_log': ('django.db.models.fields.TextField', [], {'null': 'True', 'blank': 'True'}),
              'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
              'finished_at': ('django.db.models.fields.DateTimeField', [], {'null': 'True'}),
              'host': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'host_maintenance'", 'to': u"orm['physical.Host']"}),
              u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
              'main_log': ('django.db.models.fields.TextField', [], {'null': 'True', 'blank': 'True'}),
              'maintenance': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "u'maintenance'", 'to': u"orm['maintenance.Maintenance']"}),
              'rollback_log': ('django.db.models.fields.TextField', [], {'null': 'True', 'blank': 'True'}),
              'started_at': ('django.db.models.fields.DateTimeField', [], {'null': 'True'}),
              'status': ('django.db.models.fields.IntegerField', [], {'default': '4'}),
              'updated_at': ('django.db.models.fields.DateTimeField', [], {'auto_now': 'True', 'blank': 'True'})
          },
          u'maintenance.maintenance': {
              'Meta': {'object_name': 'Maintenance'},
              'check_script': ('django.db.models.fields.TextField', [], {'null': 'True', 'blank': 'True'}),
              'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
              'description': ('django.db.models.fields.CharField', [], {'max_length': '500'}),
              'host_query': ('django.db.models.fields.TextField', [], {}),
              u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
              'main_script': ('django.db.models.fields.TextField', [], {}),
              'maximum_workers': ('django.db.models.fields.PositiveSmallIntegerField', [], {'default': '1'}),
              'rollback_script': ('django.db.models.fields.TextField', [], {'null': 'True', 'blank': 'True'}),
              'scheduled_for': ('django.db.models.fields.DateTimeField', [], {}),
              'updated_at': ('django.db.models.fields.DateTimeField', [], {'auto_now': 'True', 'blank': 'True'})
          },
          u'physical.host': {
              'Meta': {'object_name': 'Host'},
              'address': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
              'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
              'hostname': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '255'}),
              u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
              'monitor_url': ('django.db.models.fields.URLField', [], {'max_length': '500', 'null': 'True', 'blank': 'True'}),
              'updated_at': ('django.db.models.fields.DateTimeField', [], {'auto_now': 'True', 'blank': 'True'})
          }
      }
  
      complete_apps = ['maintenance']
subject: Remove check script