Task LSMR-102: Allow ordering and filtering in URLs by default

SAS/LSMR/src/lsmr/settings.py

@@ -54,6 +54,7 @@ INSTALLED_APPS = [
     'django_json_widget',
     'jsoneditor',
     'drf_yasg',
+    'django_filters',
 ]
 
 MIDDLEWARE = [
@@ -137,6 +138,14 @@ REST_FRAMEWORK = {
     ],
     'PAGE_SIZE': 50,
     'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.LimitOffsetPagination'
+    'DEFAULT_FILTER_BACKENDS': (
+        # allows ?field=value filtering in URLs
+        # (fields allowed for filtering must be annotated in viewsets using filter_fields = ('field', ...))
+        'django_filters.rest_framework.DjangoFilterBackend',
+
+        # allows ?ordering=[-]field to order list results
+        'rest_framework.filters.OrderingFilter',
+    ),
 }
 
 # LDAP