Revision: remove salt field.

It's not really needed. More information in the respective change
in the js client.

django_etebase/migrations/0020_remove_collectionitemrevision_salt.py

@@ -0,0 +1,17 @@
+# Generated by Django 3.0.3 on 2020-06-26 08:19
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etebase', '0019_auto_20200626_0748'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='collectionitemrevision',
+            name='salt',
+        ),
+    ]

django_etebase/models.py

@@ -110,7 +110,6 @@ class CollectionItemRevision(models.Model):
     stoken = models.OneToOneField(Stoken, on_delete=models.PROTECT)
     uid = models.CharField(db_index=True, unique=True, blank=False, null=False,
                            max_length=43, validators=[Base64Url256BitlValidator])
-    salt = models.BinaryField(editable=True, blank=False, null=False, default=b'')
     item = models.ForeignKey(CollectionItem, related_name='revisions', on_delete=models.CASCADE)
     meta = models.BinaryField(editable=True, blank=False, null=False)
     current = models.BooleanField(db_index=True, default=True, null=True)

django_etebase/serializers.py

@@ -107,12 +107,11 @@ class CollectionItemRevisionSerializer(serializers.ModelSerializer):
         queryset=models.RevisionChunkRelation.objects.all(),
         many=True
     )
-    salt = BinaryBase64Field()
     meta = BinaryBase64Field()
 
     class Meta:
         model = models.CollectionItemRevision
-        fields = ('chunks', 'meta', 'uid', 'salt', 'deleted')
+        fields = ('chunks', 'meta', 'uid', 'deleted')
 
 
 class CollectionItemSerializer(serializers.ModelSerializer):