old_contents: # Generated by Django 2.0.2 on 2018-08-28 19:15
  
  from django.db import migrations, models
  import django.db.models.deletion
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('snippets', '0017_auto_20180801_1719'),
          ('books', '0058_remove_book_subject'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='book',
              name='subject',
              field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='snippets.Subject'),
          ),
      ]
  
new_contents: # Generated by Django 2.0.2 on 2018-08-28 19:15
  
  from django.db import migrations, models
  import django.db.models.deletion
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('snippets', '__first__'),
          ('books', '0058_remove_book_subject'),
      ]
  
      operations = [
          migrations.AddField(
              model_name='book',
              name='subject',
              field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='snippets.Subject'),
          ),
      ]
  
subject: update migration dependencies