#31 API DELETE

* adds support for DELETE method for all relevant objects
* improves get_obj_from_db functionality
* drops custom compensation logic for get_obj_from_db due to improvement of base method

api/utils/serializer/serializer.py

@@ -11,6 +11,8 @@ from abc import abstractmethod
 from django.contrib.gis import geos
 from django.contrib.gis.geos import GEOSGeometry
 
+from konova.utils.message_templates import DATA_UNSHARED
+
 
 class AbstractModelAPISerializer:
     model = None
@@ -66,7 +68,7 @@ class AbstractModelAPISerializer:
             # Return all objects
             del self.lookup["id"]
         else:
-            # Return certain objects
+            # Return certain object
             self.lookup["id"] = _id
         self.lookup["users__in"] = [user]
 
@@ -139,10 +141,14 @@ class AbstractModelAPISerializer:
         Returns:
 
         """
-        return self.model.objects.get(
+        obj = self.model.objects.get(
             id=id,
-            users__in=[user]
+            deleted__isnull=True,
         )
+        is_shared = obj.is_shared_with(user)
+        if not is_shared:
+            raise PermissionError(DATA_UNSHARED)
+        return obj
 
     @abstractmethod
     def initialize_objects(self, json_model, user):