fix: added serializer_class to views needed

core/apps/contracts/serializers/contracts/contracts.py

@@ -154,3 +154,20 @@ class CreateContractSerializer(BaseContractSerializer):
                 attached_files.save()  # type: ignore
 
         return contract
+
+
+###########################################################
+# Query Serializers
+###########################################################
+class RetrieveContractQuerySerializer(serializers.Serializer):
+    folders = serializers.ListField(
+        child=serializers.CharField(),
+        required=False,
+        help_text="Company Folders that contract should be allocated to."
+    )
+    status = serializers.ListField(
+        child=serializers.CharField(),
+        required=False,
+        help_text="Contract Status which contract have related to current owner."
+    )
+    only_my_contracts = serializers.BooleanField(default=False)