Compensation index view

* adds filters and table optimizations for compensation index rendering
* fixes recorded_by/checked_by confusion in intervention table

compensation/filters.py

@@ -0,0 +1,37 @@
+"""
+Author: Michel Peltriaux
+Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
+Contact: michel.peltriaux@sgdnord.rlp.de
+Created on: 29.07.21
+
+"""
+from django.db.models import QuerySet
+
+from intervention.filters import InterventionTableFilter
+
+
+class CompensationTableFilter(InterventionTableFilter):
+    """ TableFilter for compensations
+
+    Based widely on InterventionTableFilter.
+    Just some minor changes for Compensation model.
+
+    """
+
+    def _filter_show_recorded(self, queryset, name, value) -> QuerySet:
+        """ Filters queryset depending on value of 'show_recorded' setting
+
+        Args:
+            queryset ():
+            name ():
+            value ():
+
+        Returns:
+
+        """
+        if not value:
+            return queryset.filter(
+                intervention__recorded_on=None,
+            )
+        else:
+            return queryset