Fix the from number in the post_sms_response. If the service.sms_sender is not set the FROM_NUMBER from the config is returned, which is the default for the notification.

app/v2/notifications/notification_schemas.py

@@ -148,7 +148,7 @@ sms_content = {
         "body": {"type": "string"},
         "from_number": {"type": "string"}
     },
-    "required": ["body"]
+    "required": ["body", "from_number"]
 }
 
 post_sms_response = {

app/v2/notifications/post_notifications.py

@@ -1,4 +1,4 @@
-from flask import request, jsonify
+from flask import request, jsonify, current_app
 from sqlalchemy.orm.exc import NoResultFound
 
 from app import api_user
@@ -40,10 +40,10 @@ def post_sms_notification():
                                         key_type=api_user.key_type,
                                         reference=form.get('reference'))
     send_notification_to_queue(notification, service.research_mode)
-
+    sms_sender = service.sms_sender if service.sms_sender else current_app.config.get('FROM_NUMBER')
     resp = create_post_sms_response_from_notification(notification,
                                                       template_with_content.rendered,
-                                                      service.sms_sender,
+                                                      sms_sender,
                                                       request.url_root)
     return jsonify(resp), 201