app.memos.migrations.0004_memosnapshot_hierarchy 

 1# Generated by Django 5.2.2 on 2025-06-20 16:55
 2
 3from django.db import migrations, models
 4
 5
 6class Migration(migrations.Migration):
 7
 8    dependencies = [
 9        ('memos', '0003_memosnapshot'),
10    ]
11
12    operations = [
13        migrations.AddField(
14            model_name='memosnapshot',
15            name='hierarchy',
16            field=models.JSONField(default=dict),
17        ),
18    ]
class Migration(django.db.migrations.migration.Migration): 
 7class Migration(migrations.Migration):
 8
 9    dependencies = [
10        ('memos', '0003_memosnapshot'),
11    ]
12
13    operations = [
14        migrations.AddField(
15            model_name='memosnapshot',
16            name='hierarchy',
17            field=models.JSONField(default=dict),
18        ),
19    ]

The base class for all migrations.

Migration files will import this from django.db.migrations.Migration and subclass it as a class called Migration. It will have one or more of the following attributes:

  • operations: A list of Operation instances, probably from django.db.migrations.operations
  • dependencies: A list of tuples of (app_path, migration_name)
  • run_before: A list of tuples of (app_path, migration_name)
  • replaces: A list of migration_names

Note that all migrations come out of migrations and into the Loader or Graph as instances, having been initialized with their app label and name.

dependencies = [('memos', '0003_memosnapshot')]
operations = [<AddField model_name='memosnapshot', name='hierarchy', field=<django.db.models.fields.json.JSONField>>]