#31 API basic implementation Compensation

* adds compensation fetching for API v1
* refactors filter into predefined lookup dict of super class (needs to be customized on subclasses)

api/views/views.py

@@ -24,10 +24,19 @@ class AbstractModelAPIView(View):
     """
     model = None
     user = None
+    lookup = None
 
     class Meta:
         abstract = True
 
+    def __init__(self, *args, **kwargs):
+        self.lookup = {
+            "id": None,  # must be set in subclasses
+            "deleted__isnull": True,
+            "users__in": [],  # must be set in subclasses
+        }
+        super().__init__(*args, **kwargs)
+
     @abstractmethod
     def model_to_json(self, entry):
         """ Defines the returned json values of the model
@@ -40,16 +49,15 @@ class AbstractModelAPIView(View):
         """
         raise NotImplementedError("Must be implemented in subclasses")
 
-    def fetch_and_serialize(self, _filter):
+    def fetch_and_serialize(self):
         """ Serializes the model entry according to the given lookup data
 
         Args:
-            _filter (dict): Lookup declarations
 
         Returns:
             serialized_data (dict)
         """
-        qs = self.model.objects.filter(**_filter)
+        qs = self.model.objects.filter(**self.lookup)
         serialized_data = {}
         for entry in qs:
             serialized_data[str(entry.pk)] = self.model_to_json(entry)