Return the current user's custom fields

app/assets/javascripts/discourse/models/composer.js

@@ -455,6 +455,7 @@ Discourse.Composer = Discourse.Model.extend({
       username: currentUser.get('username'),
       user_id: currentUser.get('id'),
       uploaded_avatar_id: currentUser.get('uploaded_avatar_id'),
+      user_custom_fields: currentUser.get('custom_fields'),
       archetype: this.get('archetypeId'),
       post_type: Discourse.Site.currentProp('post_types.regular'),
       target_usernames: this.get('targetUsernames'),

app/serializers/current_user_serializer.rb

@@ -20,7 +20,8 @@ class CurrentUserSerializer < BasicUserSerializer
              :can_delete_account,
              :should_be_redirected_to_top,
              :redirected_to_top_reason,
-             :disable_jump_reply
+             :disable_jump_reply,
+             :custom_fields
 
   def include_site_flagged_posts_count?
     object.staff?
@@ -70,4 +71,10 @@ class CurrentUserSerializer < BasicUserSerializer
     object.redirected_to_top_reason.present?
   end
 
+  def custom_fields
+    return {} unless SiteSetting.public_user_custom_fields.present?
+    fields = User.custom_fields_for_ids([object.id], SiteSetting.public_user_custom_fields.split('|'))
+    return fields.present? ? fields[object.id] : {}
+  end
+
 end