new_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.11.15 on 2018-09-19 18:42
  from __future__ import unicode_literals
  
  from django.db import migrations
  from django.db import models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('content', '0012_auto_20180910_1702'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='file',
              name='preset',
              field=models.CharField(blank=True, choices=[(b'high_res_video', b'High Resolution'), (b'low_res_video', b'Low Resolution'), (b'vector_video', b'Vectorized'), (b'video_thumbnail', b'Thumbnail'), (b'video_subtitle', b'Subtitle'), (b'video_dependency', b'Video (dependency)'), (b'audio', b'Audio'), (b'audio_thumbnail', b'Thumbnail'), (b'document', b'Document'), (b'epub', b'ePub Document'), (b'document_thumbnail', b'Thumbnail'), (b'exercise', b'Exercise'), (b'exercise_thumbnail', b'Thumbnail'), (b'exercise_image', b'Exercise Image'), (b'exercise_graphie', b'Exercise Graphie'), (b'channel_thumbnail', b'Channel Thumbnail'), (b'topic_thumbnail', b'Thumbnail'), (b'html5_zip', b'HTML5 Zip'), (b'html5_dependency', b'HTML5 Dependency (Zip format)'), (b'html5_thumbnail', b'HTML5 Thumbnail')], max_length=150),
          ),
          migrations.AlterField(
              model_name='localfile',
              name='extension',
              field=models.CharField(blank=True, choices=[(b'mp4', b'MP4 Video'), (b'vtt', b'VTT Subtitle'), (b'mp3', b'MP3 Audio'), (b'pdf', b'PDF Document'), (b'jpg', b'JPG Image'), (b'jpeg', b'JPEG Image'), (b'png', b'PNG Image'), (b'gif', b'GIF Image'), (b'json', b'JSON'), (b'svg', b'SVG Image'), (b'perseus', b'Perseus Exercise'), (b'graphie', b'Graphie Exercise'), (b'zip', b'HTML5 Zip'), (b'epub', b'ePub Document')], max_length=40),
          ),
      ]
  
subject: Make migrations