Fixed avatar not displaying in issue boards

This happens when Gravatar is disabled in the admin settings, the avatar is returned as null & then frontend didn't do anything about it.

Closes #31428

2 files changed, 3 insertions, 1 deletions

diff --git a/app/assets/javascripts/boards/models/user.js b/app/assets/javascripts/boards/models/user.js
index 8e9de4d4cbb..875c21a37d3 100644
--- a/app/assets/javascripts/boards/models/user.js
+++ b/app/assets/javascripts/boards/models/user.js
@@ -1,11 +1,12 @@
 /* eslint-disable no-unused-vars */
+import defaultAvatar from '../utils/default_avatar';
 
 class ListUser {
   constructor(user) {
     this.id = user.id;
     this.name = user.name;
     this.username = user.username;
-    this.avatar = user.avatar_url;
+    this.avatar = user.avatar_url || defaultAvatar();
   }
 }
 
diff --git a/app/assets/javascripts/boards/utils/default_avatar.js b/app/assets/javascripts/boards/utils/default_avatar.js
new file mode 100644
index 00000000000..062ffec6dce
--- /dev/null
+++ b/app/assets/javascripts/boards/utils/default_avatar.js
@@ -0,0 +1 @@
+export default () => document.getElementById('board-app').dataset.defaultAvatar;