old_contents: # Generated by Django 2.2 on 2019-04-15 19:28
  
  from django.db import migrations, models
  import django.db.models.deletion
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('contenttypes', '0002_remove_content_type_name'),
          ('extras', '0021_add_color_comments_changelog_to_tag'),
      ]
  
      operations = [
          migrations.CreateModel(
              name='CustomLink',
              fields=[
                  ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('name', models.CharField(max_length=100, unique=True)),
                  ('text', models.CharField(max_length=200)),
                  ('url', models.CharField(max_length=200)),
                  ('weight', models.PositiveSmallIntegerField(default=100)),
                  ('group_name', models.CharField(blank=True, max_length=50)),
                  ('button_class', models.CharField(default='default', max_length=30)),
                  ('new_window', models.BooleanField()),
                  ('content_type', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='contenttypes.ContentType')),
              ],
              options={
                  'ordering': ['group_name', 'weight', 'name'],
              },
          ),
      ]
  
new_contents: # Generated by Django 2.2 on 2019-04-15 19:28
  
  from django.db import migrations, models
  import django.db.models.deletion
  import extras.models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('contenttypes', '0002_remove_content_type_name'),
          ('extras', '0021_add_color_comments_changelog_to_tag'),
      ]
  
      operations = [
          migrations.CreateModel(
              name='CustomLink',
              fields=[
                  ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
                  ('name', models.CharField(max_length=100, unique=True)),
                  ('text', models.CharField(max_length=200)),
                  ('url', models.CharField(max_length=200)),
                  ('weight', models.PositiveSmallIntegerField(default=100)),
                  ('group_name', models.CharField(blank=True, max_length=50)),
                  ('button_class', models.CharField(default='default', max_length=30)),
                  ('new_window', models.BooleanField()),
                  ('content_type', models.ForeignKey(limit_choices_to=extras.models.get_custom_link_models, on_delete=django.db.models.deletion.CASCADE, to='contenttypes.ContentType')),
              ],
              options={
                  'ordering': ['group_name', 'weight', 'name'],
              },
          ),
      ]
  
subject: Add limit_choices_to to CustomLink.content_type field