fix initial balance logic and add edit for cycle data

backend/apps/farms/serializers.py

@@ -56,6 +56,20 @@ class CycleSerializer(PkAsIdMixin, serializers.ModelSerializer):
             "kandang_name",
             "feed_initial_balance",
             "feed_initial_balance_date",
+            "status",
             "created_at",
             "updated_at",
         ]
+
+    def validate(self, attrs):
+        attrs.pop("status", None)
+        start = attrs.get("start_date", getattr(self.instance, "start_date", None))
+        end = attrs.get("end_date", getattr(self.instance, "end_date", None))
+        if start and end and end < start:
+            raise serializers.ValidationError({"end_date": "Must be on or after start_date."})
+        return attrs
+
+    def to_representation(self, instance):
+        if instance.sync_status():
+            instance.save(update_fields=["status", "updated_at"])
+        return super().to_representation(instance)