Resolve TMSS-272

Closes TMSS-272 Please see comments in JIRA as well. This was quite a hard feature to implement, as it touched many pieces of code. In the end I think the result is better than what we started with because we now have reusable schemas with lots of validation, and full annotation of the schemas.

SAS/TMSS/src/tmss/tmssapp/serializers/specification.py

@@ -16,7 +16,10 @@ class RelationalHyperlinkedModelSerializer(serializers.HyperlinkedModelSerialize
 
     def get_field_names(self, declared_fields, info):
         field_names = super().get_field_names(declared_fields, info)
-        field_names.remove(self.url_field_name) # is added later, see retun statement
+        try:
+            field_names.remove(self.url_field_name) # is added later, see retun statement
+        except ValueError:
+            pass
 
         if getattr(self.Meta, 'extra_fields', None):
             field_names += self.Meta.extra_fields
@@ -280,6 +283,16 @@ class SchedulingUnitDraftSerializer(RelationalHyperlinkedModelSerializer):
         fields = '__all__'
         extra_fields = ['scheduling_unit_blueprints', 'task_drafts', 'duration']
 
+class SchedulingUnitDraftCopySerializer(SchedulingUnitDraftSerializer):
+    class Meta(SchedulingUnitDraftSerializer.Meta):
+       fields = ['copy_reason']
+       extra_fields =['scheduling_set_id']
+       read_only_fields = ['scheduling_unit_blueprints','task_drafts']
+
+class SchedulingUnitDraftCopyFromSchedulingSetSerializer(SchedulingUnitDraftSerializer):
+    class Meta(SchedulingUnitDraftSerializer.Meta):
+       fields = ['copy_reason']
+       read_only_fields = ['scheduling_unit_blueprints','task_drafts']
 
 class SchedulingUnitBlueprintSerializer(RelationalHyperlinkedModelSerializer):
     requirements_doc = JSONEditorField(schema_source="requirements_template.schema")
@@ -290,6 +303,13 @@ class SchedulingUnitBlueprintSerializer(RelationalHyperlinkedModelSerializer):
         fields = '__all__'
         extra_fields = ['task_blueprints', 'duration', 'start_time', 'stop_time']
 
+class SchedulingUnitBlueprintCopyToSchedulingUnitDraftSerializer(SchedulingUnitBlueprintSerializer):
+    class Meta(SchedulingUnitDraftSerializer.Meta):
+       fields = ['copy_reason']
+       extra_fields =['scheduling_set_id']
+       read_only_fields = ['scheduling_unit_blueprints','task_drafts']
+       
+
 
 class TaskDraftSerializer(RelationalHyperlinkedModelSerializer):