Fixed an inheritance issue where enxrypted fields would fail parsing …

…db data to the correct type

fernet_fields/fields.py

@@ -19,6 +19,7 @@
     'EncryptedDateField',
     'EncryptedDateTimeField',
     'EncryptedBinaryField',
+    'EncryptedJSONField',
 ]
 
 
@@ -76,8 +77,10 @@ def get_db_prep_save(self, value, connection):
 
     def from_db_value(self, value, expression, connection, *args):
         if value is not None:
-            value = bytes(value)
-            return self.to_python(force_text(self.fernet.decrypt(value)))
+            value = self.to_python(force_text(self.fernet.decrypt(bytes(value))))
+            return super(
+                EncryptedField, self
+            ).from_db_value(value, expression, connection, *args)
 
     @cached_property
     def validators(self):
@@ -134,6 +137,8 @@ class EncryptedDateTimeField(EncryptedField, models.DateTimeField):
 
 
 class EncryptedBinaryField(EncryptedField, models.BinaryField):
-    def from_db_value(self, value, expression, connection, *args):
-        if value is not None:
-            return self.to_python(self.fernet.decrypt(bytes(value)))
+    pass
+
+
+class EncryptedJSONField(EncryptedField, models.JSONField):
+    pass

fernet_fields/test/models.py

@@ -29,3 +29,7 @@ class EncryptedDateTime(models.Model):
 
 class EncryptedNullable(models.Model):
     value = fields.EncryptedIntegerField(null=True)
+
+
+class EncryptedJSON(models.Model):
+    value = fields.EncryptedJSONField()

fernet_fields/test/test_fields.py

@@ -68,6 +68,7 @@ def test_get_integer_field_validators(self):
         (models.EncryptedEmail, ['a@example.com', 'b@example.com']),
         (models.EncryptedInt, [1, 2]),
         (models.EncryptedDate, [date(2015, 2, 5), date(2015, 2, 8)]),
+        (models.EncryptedJSON, [{'test': 1}, {'test': 1}]),
         (
             models.EncryptedDateTime,
             [datetime(2015, 2, 5, 15), datetime(2015, 2, 8, 16)],