CollectionMember: add stokens when we create/change the member.

django_etesync/migrations/0011_collectionmember_stoken.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.3 on 2020-05-27 07:43
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0010_auto_20200526_1539'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='collectionmember',
+            name='stoken',
+            field=models.OneToOneField(null=True, on_delete=django.db.models.deletion.PROTECT, to='django_etesync.Stoken'),
+        ),
+    ]

django_etesync/migrations/0012_auto_20200527_0743.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.0.3 on 2020-05-27 07:43
+
+from django.db import migrations
+
+
+def create_stokens(apps, schema_editor):
+    Stoken = apps.get_model('django_etesync', 'Stoken')
+    CollectionMember = apps.get_model('django_etesync', 'CollectionMember')
+
+    for member in CollectionMember.objects.all():
+        member.stoken = Stoken.objects.create()
+        member.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0011_collectionmember_stoken'),
+    ]
+
+    operations = [
+        migrations.RunPython(create_stokens),
+    ]

django_etesync/models.py

@@ -139,6 +139,7 @@ class AccessLevels(models.TextChoices):
 
 
 class CollectionMember(models.Model):
+    stoken = models.OneToOneField(Stoken, on_delete=models.PROTECT, null=True)
     collection = models.ForeignKey(Collection, related_name='members', on_delete=models.CASCADE)
     user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
     encryptionKey = models.BinaryField(editable=True, blank=False, null=False)

django_etesync/serializers.py

@@ -212,6 +212,7 @@ class CollectionSerializer(serializers.ModelSerializer):
             process_revisions_for_item(main_item, revision_data)
 
             models.CollectionMember(collection=instance,
+                                    stoken=models.Stoken.objects.create(),
                                     user=validated_data.get('owner'),
                                     accessLevel=models.AccessLevels.ADMIN,
                                     encryptionKey=encryption_key,
@@ -258,8 +259,11 @@ class CollectionMemberSerializer(serializers.ModelSerializer):
     def update(self, instance, validated_data):
         with transaction.atomic():
             # We only allow updating accessLevel
-            instance.accessLevel = validated_data.pop('accessLevel')
+            access_level = validated_data.pop('accessLevel')
-            instance.save()
+            if instance.accessLevel != access_level:
+                instance.stoken = models.Stoken.objects.create()
+                instance.accessLevel = access_level
+                instance.save()
 
         return instance
 
@@ -314,6 +318,7 @@ class InvitationAcceptSerializer(serializers.Serializer):
 
             member = models.CollectionMember.objects.create(
                 collection=invitation.collection,
+                stoken=models.Stoken.objects.create(),
                 user=invitation.user,
                 accessLevel=invitation.accessLevel,
                 encryptionKey=encryption_key,