Change if(realm.domain == zulip.com) checks to use Realm.string_id.

zerver/lib/export.py

@@ -581,7 +581,7 @@ def fetch_user_profile_cross_realm(response, config, context):
     # type: (TableData, Config, Context) -> None
     realm = context['realm']
 
-    if realm.domain == "zulip.com":
+    if realm.string_id == "zulip":
         response['zerver_userprofile_crossrealm'] = []
     else:
         response['zerver_userprofile_crossrealm'] = [dict(email=x.email, id=x.id) for x in [

zerver/lib/notifications.py

@@ -393,7 +393,7 @@ def send_future_email(recipients, email_html, email_text, subject,
        settings.EMAIL_BACKEND != 'django.core.mail.backends.console.EmailBackend':
         for recipient in recipients:
             email = recipient.get("email")
-            if get_user_profile_by_email(email).realm.domain != "zulip.com":
+            if get_user_profile_by_email(email).realm.string_id != "zulip":
                 raise ValueError("digest: refusing to send emails to non-zulip.com users.")
 
     # message = {"from_email": "othello@zulip.com",

zerver/tests/test_upload.py

@@ -184,7 +184,7 @@ class FileUploadTest(UploadSerializeMixin, ZulipTestCase):
 
         # invalid realm of 999999 (for non-zulip.com)
         user = get_user_profile_by_email('hamlet@zulip.com')
-        user.realm.domain = 'example.com'
+        user.realm.string_id = 'not-zulip'
         user.realm.save()
 
         with use_s3(), getting_realm_id(999999):

zerver/views/upload.py

@@ -28,7 +28,7 @@ def serve_s3(request, user_profile, realm_id_str, filename):
         realm_id = int(realm_id_str)
 
     # Internal users can access all uploads so we can receive attachments in cross-realm messages
-    if user_profile.realm_id == realm_id or user_profile.realm.domain == 'zulip.com':
+    if user_profile.realm_id == realm_id or user_profile.realm.string_id == 'zulip':
         uri = get_signed_upload_url(url_path)
         return redirect(uri)
     else: