added suggested changes

assets/javascripts/discourse/initializers/extend-for-assigns.js

@@ -480,11 +480,11 @@ function initialize(api) {
           }
           const icon = iconHTML(assignee.username ? "user-plus" : "group-plus");
           let name;
-          if (siteSettings.prioritize_full_name_in_ux || !assignee.username) {
-            name = assignee.name;
-          } else {
-            name = assignee.username;
-          }
+
+          name =
+            this.siteSettings.prioritize_full_name_in_ux || !assignee.username
+              ? assignee.name || assignee.username
+              : assignee.username;
 
           const tagName = params.tagName || "a";
           const href =
@@ -578,13 +578,13 @@ function initialize(api) {
           })
         )}</span>`;
       };
+
       let displayedName = "";
       if (assignedToUser) {
-        if (this.siteSettings.prioritize_full_name_in_ux) {
-          displayedName = assignedToUser.name;
-        } else {
-          displayedName = assignedToUser.username;
-        }
+        this.siteSettings.prioritize_full_name_in_ux
+          ? assignedToUser.name || assignedToUser.username
+          : assignedToUser.username;
+
         assigneeElements.push(
           h(
             "span.assignee",
@@ -617,12 +617,11 @@ function initialize(api) {
         Object.keys(indirectlyAssignedTo).map((postId) => {
           const assignee = indirectlyAssignedTo[postId].assigned_to;
           const postNumber = indirectlyAssignedTo[postId].post_number;
-          if (this.siteSettings.prioritize_full_name_in_ux || !assignee.username) {
-            displayedName = assignee.name;
-          } else{
-            displayedName = assignee.username;
-          }
-          
+          displayedName =
+            this.siteSettings.prioritize_full_name_in_ux || !assignee.username
+              ? assignee.name || assignee.username
+              : assignee.username;
+
           assigneeElements.push(
             h("span.assignee", [
               h(

spec/system/assign_post_spec.rb

@@ -12,9 +12,6 @@ describe "Assign | Assigning posts", type: :system do
   before do
     SiteSetting.assign_enabled = true
 
-    # # The system tests in this file are flaky and auth token related so turning this on
-    # SiteSetting.verbose_auth_token_logging = true
-
     sign_in(admin)
   end
 
@@ -43,7 +40,7 @@ describe "Assign | Assigning posts", type: :system do
       expect(page).to have_no_css("#topic .assigned-to")
     end
 
-    it "can submit form with shortcut from texatea" do
+    it "can submit modal form with shortcuts" do
       visit "/t/#{topic.id}"
 
       topic_page.click_assign_post(post2)
@@ -70,6 +67,19 @@ describe "Assign | Assigning posts", type: :system do
         expect(topic_page.find_post_assign(post1.post_number)).to have_content(staff_user.name)
         expect(topic_page.find_post_assign(post2.post_number)).to have_content(staff_user.name)
       end
+
+      it "show the user's username if there is no name" do
+        visit "/t/#{topic.id}"
+        staff_user.name = nil
+        staff_user.save
+        staff_user.reload
+
+        topic_page.click_assign_post(post2)
+        assign_modal.assignee = staff_user
+        assign_modal.confirm
+        expect(topic_page.find_post_assign(post1.post_number)).to have_content(staff_user.username)
+        expect(topic_page.find_post_assign(post2.post_number)).to have_content(staff_user.username)
+      end
     end
 
     context "when assigns are not public" do

spec/system/assign_topic_spec.rb

@@ -61,6 +61,18 @@ describe "Assign | Assigning topics", type: :system do
         assign_modal.confirm
         expect(find("#topic .assigned-to")).to have_content(staff_user.name)
       end
+
+      it "show the user's username if there is no name" do
+        visit "/t/#{topic.id}"
+        staff_user.name = nil
+        staff_user.save
+        staff_user.reload
+
+        topic_page.click_assign_topic
+        assign_modal.assignee = staff_user
+        assign_modal.confirm
+        expect(find("#topic .assigned-to")).to have_content(staff_user.name)
+      end
     end
 
     context "when assigns are not public" do