fix - change quota weight statistic by herd light/heavy vount

apps/herd/services/services.py

@@ -54,6 +54,30 @@ def get_rancher_statistics(rancher: Rancher = None) -> typing.Any:
     return [{'name': key, 'value': value} for key, value in stats.items()], stats
 
 
+def get_rancher_statistic_by_herd(rancher: Rancher = None) -> typing.Any:
+    """ get statistics of a rancher by his herds """  # noqa
+
+    herds = rancher.herd.all()
+    if herds.exists():
+        stats = herds.aggregate(
+            herd_count=Count("id", distinct=True),
+            light_count=Sum('light_livestock_number'),
+            heavy_count=Sum('heavy_livestock_number'),
+            sheep=Sum('light_livestock_number'),  # noqa
+            cow=Sum('heavy_livestock_number'),
+        )
+    else:
+        stats = {
+            'herd_count': 0,
+            'light_count': 0,
+            'heavy_count': 0,
+            'sheep': 0,
+            'cow': 0,
+        }
+
+    return [{'name': key, 'value': value} for key, value in stats.items()], stats
+
+
 def rancher_quota_weight(
         rancher: Rancher,
         inventory_entry: InventoryEntry = None,
@@ -89,7 +113,7 @@ def rancher_quota_weight(
     herds = rancher.herd.all()
     herd_livestock_gropes = [herd.activity for herd in herds]
 
-    livestock_counts_list, livestock_counts_dict = get_rancher_statistics(rancher)
+    livestock_counts_list, livestock_counts_dict = get_rancher_statistic_by_herd(rancher)
 
     total_weight = 0
     merged = {}