# -*- coding: 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):

        # Changing field 'SessionBlockTweet.sent_at'
        db.alter_column(u'twit_sessionblocktweet', 'sent_at', self.gf('django.db.models.fields.DateTimeField')(null=True))

    def backwards(self, orm):

        # User chose to not deal with backwards NULL issues for 'SessionBlockTweet.sent_at'
        raise RuntimeError("Cannot reverse this migration. 'SessionBlockTweet.sent_at' and its values cannot be restored.")

    models = {
        u'auth.group': {
            'Meta': {'object_name': 'Group'},
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'name': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '80'}),
            'permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'})
        },
        u'auth.permission': {
            'Meta': {'ordering': "(u'content_type__app_label', u'content_type__model', u'codename')", 'unique_together': "((u'content_type', u'codename'),)", 'object_name': 'Permission'},
            'codename': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
            'content_type': ('django.db.models.fields.related.ForeignKey', [], {'to': u"orm['contenttypes.ContentType']"}),
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'name': ('django.db.models.fields.CharField', [], {'max_length': '50'})
        },
        u'auth.user': {
            'Meta': {'object_name': 'User'},
            'date_joined': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
            'email': ('django.db.models.fields.EmailField', [], {'max_length': '75', 'blank': 'True'}),
            'first_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
            'groups': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['auth.Group']", 'symmetrical': 'False', 'blank': 'True'}),
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'is_active': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
            'is_staff': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'is_superuser': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'last_login': ('django.db.models.fields.DateTimeField', [], {'default': 'datetime.datetime.now'}),
            'last_name': ('django.db.models.fields.CharField', [], {'max_length': '30', 'blank': 'True'}),
            'password': ('django.db.models.fields.CharField', [], {'max_length': '128'}),
            'user_permissions': ('django.db.models.fields.related.ManyToManyField', [], {'to': u"orm['auth.Permission']", 'symmetrical': 'False', 'blank': 'True'}),
            'username': ('django.db.models.fields.CharField', [], {'unique': 'True', 'max_length': '30'})
        },
        u'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'}),
            u'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'})
        },
        u'sked.event': {
            'Meta': {'ordering': "('-start_date',)", 'object_name': 'Event'},
            'created_at': ('django.db.models.fields.DateTimeField', [], {'auto_now_add': 'True', 'blank': 'True'}),
            'created_by': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'sked_events'", 'to': u"orm['auth.User']"}),
            'end_date': ('django.db.models.fields.DateField', [], {'null': 'True', 'blank': 'True'}),
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'is_public': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'label': ('django.db.models.fields.CharField', [], {'default': "'event'", 'max_length': '64'}),
            'name': ('django.db.models.fields.CharField', [], {'max_length': '255'}),
            'registration_is_open': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'registration_url': ('django.db.models.fields.URLField', [], {'default': "''", 'max_length': '200', 'blank': 'True'}),
            'session_label': ('django.db.models.fields.CharField', [], {'default': "'session'", 'max_length': '64'}),
            'session_length': ('timedelta.fields.TimedeltaField', [], {}),
            'slug': ('django.db.models.fields.SlugField', [], {'unique': 'True', 'max_length': '50'}),
            'start_date': ('django.db.models.fields.DateField', [], {}),
            'updated_at': ('django.db.models.fields.DateTimeField', [], {'auto_now': 'True', 'blank': 'True'})
        },
        u'twit.sessionblocktweet': {
            'Meta': {'ordering': "('-timeslot', 'sent_at')", 'object_name': 'SessionBlockTweet'},
            'event': ('django.db.models.fields.related.ForeignKey', [], {'related_name': "'session_tweets'", 'to': u"orm['sked.Event']"}),
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'previous': ('django.db.models.fields.related.OneToOneField', [], {'blank': 'True', 'related_name': "'next'", 'unique': 'True', 'null': 'True', 'to': u"orm['twit.SessionBlockTweet']"}),
            'sent_at': ('django.db.models.fields.DateTimeField', [], {'null': 'True', 'blank': 'True'}),
            'session_ids': ('django.db.models.fields.CommaSeparatedIntegerField', [], {'default': "''", 'max_length': '128', 'blank': 'True'}),
            'timeslot': ('django.db.models.fields.DateTimeField', [], {})
        }
    }

    complete_apps = ['twit']