Compensation users refactoring

* moves accessibility of compensations completely into related intervention.users set
  * this way the visibility for a compensation can not differ from the one of the 'parent' intervention

compensation/filters.py

@@ -18,6 +18,24 @@ class CompensationTableFilter(InterventionTableFilter):
 
     """
 
+    def _filter_show_all(self, queryset, name, value) -> QuerySet:
+        """ Filters queryset depending on value of 'show_all' setting
+
+        Args:
+            queryset ():
+            name ():
+            value ():
+
+        Returns:
+
+        """
+        if not value:
+            return queryset.filter(
+                intervention__users__in=[self.user],  # requesting user has access
+            )
+        else:
+            return queryset
+
     def _filter_show_recorded(self, queryset, name, value) -> QuerySet:
         """ Filters queryset depending on value of 'show_recorded' setting
 

compensation/models.py

@@ -100,9 +100,6 @@ class Compensation(BaseObject):
         related_name='compensations'
     )
 
-    # Users having access on this object
-    users = models.ManyToManyField(User)
-
     @staticmethod
     def _generate_new_identifier() -> str:
         """ Generates a new identifier for the intervention object
@@ -153,3 +150,6 @@ class EcoAccount(Compensation):
     with some kind of currency. From this account one is able to 'withdraw' currency for current projects.
     """
     handler = models.CharField(max_length=500, null=True, blank=True, help_text="Who is responsible for handling the actions")
+
+    # Users having access on this object
+    users = models.ManyToManyField(User)