return allowed_broadcast_provider via get by service id

app/schemas.py

@@ -222,6 +222,10 @@ class ServiceSchema(BaseSchema, UUIDsAsStringsMixin):
     organisation = field_for(models.Service, 'organisation')
     override_flag = False
     go_live_at = field_for(models.Service, 'go_live_at', format=DATETIME_FORMAT_NO_TIMEZONE)
+    allowed_broadcast_provider = fields.Method(dump_only=True, serialize='_get_allowed_broadcast_provider')
+
+    def _get_allowed_broadcast_provider(self, service):
+        return service.allowed_broadcast_provider
 
     def get_letter_logo_filename(self, service):
         return service.letter_branding and service.letter_branding.filename
@@ -261,6 +265,7 @@ class ServiceSchema(BaseSchema, UUIDsAsStringsMixin):
             'version',
             'guest_list',
             'broadcast_messages',
+            'service_broadcast_provider_restriction',
         )
         strict = True
 

tests/app/service/test_rest.py

@@ -19,6 +19,7 @@ from app.models import (
     Notification,
     Permission,
     Service,
+    ServiceBroadcastProviderRestriction,
     ServiceEmailReplyTo,
     ServiceLetterContact,
     ServicePermission,
@@ -271,10 +272,21 @@ def test_get_service_by_id(admin_request, sample_service):
         'volume_email',
         'volume_letter',
         'volume_sms',
-
     }
 
 
+def test_get_service_by_id_returns_allowed_broadcast_provider(notify_db, admin_request, sample_service):
+    notify_db.session.add(ServiceBroadcastProviderRestriction(
+        service=sample_service,
+        provider='ee'
+    ))
+    notify_db.session.commit()
+
+    json_resp = admin_request.get('service.get_service_by_id', service_id=sample_service.id)
+    assert json_resp['data']['id'] == str(sample_service.id)
+    assert json_resp['data']['allowed_broadcast_provider'] == 'ee'
+
+
 @pytest.mark.parametrize('detailed', [True, False])
 def test_get_service_by_id_returns_organisation_type(admin_request, sample_service, detailed):
     json_resp = admin_request.get('service.get_service_by_id', service_id=sample_service.id, detailed=detailed)