Make access level an int instead of a string.

We started with a string because we thought it could maybe provide more
flexibility, though really, an int makes much more sense, especially on
all the platforms etebase runs nowadays.

django_etebase/migrations/0026_auto_20200907_0752.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.1 on 2020-09-07 07:52
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etebase', '0025_auto_20200804_1216'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='collectioninvitation',
+            old_name='accessLevel',
+            new_name='accessLevelOld',
+        ),
+        migrations.RenameField(
+            model_name='collectionmember',
+            old_name='accessLevel',
+            new_name='accessLevelOld',
+        ),
+    ]

django_etebase/migrations/0027_auto_20200907_0752.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.1 on 2020-09-07 07:52
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etebase', '0026_auto_20200907_0752'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='collectioninvitation',
+            name='accessLevel',
+            field=models.IntegerField(choices=[(0, 'Read Only'), (1, 'Admin'), (2, 'Read Write')], default=0),
+        ),
+        migrations.AddField(
+            model_name='collectionmember',
+            name='accessLevel',
+            field=models.IntegerField(choices=[(0, 'Read Only'), (1, 'Admin'), (2, 'Read Write')], default=0),
+        ),
+    ]

django_etebase/migrations/0028_auto_20200907_0754.py

@@ -0,0 +1,39 @@
+# Generated by Django 3.1 on 2020-09-07 07:54
+
+from django.db import migrations
+
+from django_etebase.models import AccessLevels
+
+
+def change_access_level_to_int(apps, schema_editor):
+    CollectionMember = apps.get_model('django_etebase', 'CollectionMember')
+    CollectionInvitation = apps.get_model('django_etebase', 'CollectionInvitation')
+
+    for member in CollectionMember.objects.all():
+        if member.accessLevelOld == 'adm':
+            member.accessLevel = AccessLevels.ADMIN
+        elif member.accessLevelOld == 'rw':
+            member.accessLevel = AccessLevels.READ_WRITE
+        elif member.accessLevelOld == 'ro':
+            member.accessLevel = AccessLevels.READ_ONLY
+        member.save()
+
+    for invitation in CollectionInvitation.objects.all():
+        if invitation.accessLevelOld == 'adm':
+            invitation.accessLevel = AccessLevels.ADMIN
+        elif invitation.accessLevelOld == 'rw':
+            invitation.accessLevel = AccessLevels.READ_WRITE
+        elif invitation.accessLevelOld == 'ro':
+            invitation.accessLevel = AccessLevels.READ_ONLY
+        invitation.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etebase', '0027_auto_20200907_0752'),
+    ]
+
+    operations = [
+        migrations.RunPython(change_access_level_to_int),
+    ]

django_etebase/migrations/0029_auto_20200907_0801.py

@@ -0,0 +1,21 @@
+# Generated by Django 3.1 on 2020-09-07 08:01
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etebase', '0028_auto_20200907_0754'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='collectioninvitation',
+            name='accessLevelOld',
+        ),
+        migrations.RemoveField(
+            model_name='collectionmember',
+            name='accessLevelOld',
+        ),
+    ]

django_etebase/models.py

@@ -138,10 +138,10 @@ class RevisionChunkRelation(models.Model):
         ordering = ('id', )
 
 
-class AccessLevels(models.TextChoices):
-    ADMIN = 'adm'
-    READ_WRITE = 'rw'
-    READ_ONLY = 'ro'
+class AccessLevels(models.IntegerChoices):
+    READ_ONLY = 0
+    ADMIN = 1
+    READ_WRITE = 2
 
 
 class CollectionMember(models.Model):
@@ -149,8 +149,7 @@ class CollectionMember(models.Model):
     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)
-    accessLevel = models.CharField(
-        max_length=3,
+    accessLevel = models.IntegerField(
         choices=AccessLevels.choices,
         default=AccessLevels.READ_ONLY,
     )
@@ -195,8 +194,7 @@ class CollectionInvitation(models.Model):
 
     user = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='incoming_invitations', on_delete=models.CASCADE)
     signedEncryptionKey = models.BinaryField(editable=False, blank=False, null=False)
-    accessLevel = models.CharField(
-        max_length=3,
+    accessLevel = models.IntegerField(
         choices=AccessLevels.choices,
         default=AccessLevels.READ_ONLY,
     )