More progress.

django_etesync/migrations/0005_auto_20200220_1123.py

@@ -0,0 +1,29 @@
+# Generated by Django 3.0.3 on 2020-02-20 11:23
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0004_auto_20200220_1029'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='collectionitemchunk',
+            name='items',
+        ),
+        migrations.AddField(
+            model_name='collectionitem',
+            name='chunks',
+            field=models.ManyToManyField(related_name='items', to='django_etesync.CollectionItemChunk'),
+        ),
+        migrations.AddField(
+            model_name='collectionitemchunk',
+            name='collection',
+            field=models.ForeignKey(default=1, on_delete=django.db.models.deletion.CASCADE, related_name='chunks', to='django_etesync.Collection'),
+            preserve_default=False,
+        ),
+    ]

django_etesync/migrations/0006_auto_20200220_1137.py

@@ -0,0 +1,49 @@
+# Generated by Django 3.0.3 on 2020-02-20 11:37
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0005_auto_20200220_1123'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='collectionitem',
+            name='chunks',
+        ),
+        migrations.RemoveField(
+            model_name='collectionitem',
+            name='current',
+        ),
+        migrations.RemoveField(
+            model_name='collectionitem',
+            name='encryptionKey',
+        ),
+        migrations.RemoveField(
+            model_name='collectionitem',
+            name='hmac',
+        ),
+        migrations.RemoveField(
+            model_name='collectionitem',
+            name='version',
+        ),
+        migrations.CreateModel(
+            name='CollectionItemSnapshot',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('version', models.PositiveSmallIntegerField()),
+                ('encryptionKey', models.BinaryField(editable=True)),
+                ('hmac', models.CharField(max_length=50)),
+                ('current', models.BooleanField(db_index=True, default=True)),
+                ('chunks', models.ManyToManyField(related_name='items', to='django_etesync.CollectionItemChunk')),
+                ('item', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='snapshots', to='django_etesync.CollectionItem')),
+            ],
+            options={
+                'unique_together': {('item', 'current')},
+            },
+        ),
+    ]

django_etesync/migrations/0007_auto_20200220_1144.py

@@ -0,0 +1,28 @@
+# Generated by Django 3.0.3 on 2020-02-20 11:44
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0006_auto_20200220_1137'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='collectionitemchunk',
+            name='item',
+            field=models.ForeignKey(default=1, on_delete=django.db.models.deletion.CASCADE, related_name='chunks', to='django_etesync.CollectionItem'),
+            preserve_default=False,
+        ),
+        migrations.AlterUniqueTogether(
+            name='collectionitemchunk',
+            unique_together={('item', 'order')},
+        ),
+        migrations.RemoveField(
+            model_name='collectionitemchunk',
+            name='collection',
+        ),
+    ]