# External ID support for serializer

* adds support for sending "external_identifier" in POST and PUT requests
* if an external identifier already exists on the database, the client will be informed that the entry should not be POSTed again but rather an update via PUT should be performed

api/utils/serializer/v1/compensation.py

@@ -113,7 +113,9 @@ class CompensationAPISerializerV1(AbstractModelAPISerializerV1, AbstractCompensa
             obj = self._initialize_objects(json_model, user)
 
             # Fill in data to objects
-            properties = json_model["properties"]
+            properties = json_model.get("properties", None)
+            if not properties:
+                raise AssertionError("No 'properties' found in payload!")
             obj.identifier = obj.generate_new_identifier()
             obj.title = properties["title"]
             obj.is_cef = properties["is_cef"]
@@ -129,6 +131,7 @@ class CompensationAPISerializerV1(AbstractModelAPISerializerV1, AbstractCompensa
             obj = self._set_compensation_states(obj, properties["after_states"], obj.after_states)
             obj = self._set_deadlines(obj, properties["deadlines"])
 
+        self._set_external_identifier(obj, properties.get("external_identifier", None))
         obj.log.add(obj.created)
 
         celery_update_parcels.delay(obj.geometry.id)
@@ -153,6 +156,10 @@ class CompensationAPISerializerV1(AbstractModelAPISerializerV1, AbstractCompensa
 
             # Fill in data to objects
             properties = json_model["properties"]
+
+            external_identifier = properties.get("external_identifier", None)
+            self._check_external_identifier_on_entry_creation(external_identifier)
+
             obj.title = properties["title"]
             obj.is_cef = properties["is_cef"]
             obj.is_coherence_keeping = properties["is_coherence_keeping"]
@@ -170,6 +177,7 @@ class CompensationAPISerializerV1(AbstractModelAPISerializerV1, AbstractCompensa
             obj = self._set_compensation_states(obj, properties["after_states"], obj.after_states)
             obj = self._set_deadlines(obj, properties["deadlines"])
 
+        self._set_external_identifier(obj, properties.get("external_identifier", None))
         obj.log.add(update_action)
 
         celery_update_parcels.delay(obj.geometry.id)