Delete service cache when changing an organisation's sector

When we change an organisation's sector we now also change the sector of
all its services, so we need to delete those services from Redis.

app/main/views/organisations.py

@@ -216,8 +216,11 @@ def edit_organisation_type(org_id):
     )
 
     if form.validate_on_submit():
+        org_service_ids = [service['id'] for service in current_organisation.services]
+
         organisations_client.update_organisation(
             current_organisation.id,
+            cached_service_ids=org_service_ids,
             organisation_type=form.organisation_type.data,
         )
         return redirect(url_for('.organisation_settings', org_id=org_id))

app/notify_client/organisations_api_client.py

@@ -2,6 +2,7 @@ from itertools import chain
 
 from notifications_python_client.errors import HTTPError
 
+from app.extensions import redis_client
 from app.notify_client import NotifyAdminAPIClient, _attach_current_user, cache
 
 
@@ -45,8 +46,13 @@ class OrganisationsClient(NotifyAdminAPIClient):
 
     @cache.delete('domains')
     @cache.delete('organisations')
-    def update_organisation(self, org_id, **kwargs):
-        return self.post(url="/organisations/{}".format(org_id), data=kwargs)
+    def update_organisation(self, org_id, cached_service_ids=None, **kwargs):
+        api_response = self.post(url="/organisations/{}".format(org_id), data=kwargs)
+
+        if kwargs.get('organisation_type') and cached_service_ids:
+            redis_client.delete(*map('service-{}'.format, cached_service_ids))
+
+        return api_response
 
     def update_organisation_name(self, org_id, name):
         return self.update_organisation(org_id, name=name)