Change Organisation DAO update method

- Changed the organisation DAO update method to only make 1 query
- Updated the update rest endpoint to not return an organisation when
the update is successful

app/dao/organisation_dao.py

@@ -19,7 +19,7 @@ def dao_create_organisation(organisation):
 
 
 @transactional
-def dao_update_organisation(organisation, **kwargs):
-    for key, value in kwargs.items():
-        setattr(organisation, key, value)
-    db.session.add(organisation)
+def dao_update_organisation(organisation_id, **kwargs):
+    return Organisation.query.filter_by(id=organisation_id).update(
+        kwargs
+    )

app/organisation/rest.py

@@ -6,7 +6,7 @@ from app.dao.organisation_dao import (
     dao_get_organisation_by_id,
     dao_update_organisation,
 )
-from app.errors import register_errors
+from app.errors import register_errors, InvalidRequest
 from app.models import Organisation
 from app.organisation.organisation_schema import (
     post_create_organisation_schema,
@@ -48,10 +48,10 @@ def create_organisation():
 @organisation_blueprint.route('/<uuid:organisation_id>', methods=['POST'])
 def update_organisation(organisation_id):
     data = request.get_json()
-
     validate(data, post_update_organisation_schema)
+    result = dao_update_organisation(organisation_id, **data)
 
-    fetched_organisation = dao_get_organisation_by_id(organisation_id)
-    dao_update_organisation(fetched_organisation, **data)
-
-    return jsonify(fetched_organisation.serialize()), 200
+    if result:
+        return '', 204
+    else:
+        raise InvalidRequest("Organisation not found", 404)