FIX: Show "no category" in category-chooser (#25917)

CategoryChooser component usually displays just categories, but
sometimes it can show two none values: a "no category" or Uncategorized.
This commit makes sure that these are rendered correctly.

The problem was that the "none" item was automatically inserted in the
list of options, but that should not always happen. Toggling option
`autoInsertNoneItem` requires setting `none` too.

app/assets/javascripts/discourse/app/components/edit-category-general.hbs

@@ -19,13 +19,13 @@
       <label>{{i18n "category.parent"}}</label>
       <CategoryChooser
         @value={{this.category.parent_category_id}}
-        @categories={{this.parentCategories}}
         @allowSubCategories={{true}}
         @allowRestrictedCategories={{true}}
         @onChange={{action (mut this.category.parent_category_id)}}
         @options={{hash
           allowUncategorized=false
           excludeCategoryId=this.category.id
+          autoInsertNoneItem=true
           none=true
         }}
       />

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

@@ -176,6 +176,25 @@ export default class Category extends RestModel {
     return category;
   }
 
+  static async asyncFindBySlugPath(slugPath, opts = {}) {
+    const data = { slug_path: slugPath };
+    if (opts.includePermissions) {
+      data.include_permissions = true;
+    }
+
+    const result = await ajax("/categories/find", { data });
+
+    const categories = result["categories"].map((category) => {
+      category = Site.current().updateCategory(category);
+      if (opts.includePermissions) {
+        category.setupGroupsAndPermissions();
+      }
+      return category;
+    });
+
+    return categories[categories.length - 1];
+  }
+
   static async asyncFindBySlugPathWithID(slugPathWithID) {
     const result = await ajax("/categories/find", {
       data: { slug_path_with_id: slugPathWithID },

app/assets/javascripts/discourse/app/routes/edit-category.js

@@ -7,11 +7,9 @@ export default DiscourseRoute.extend({
   router: service(),
 
   model(params) {
-    return Category.reloadCategoryWithPermissions(
-      params,
-      this.store,
-      this.site
-    );
+    return this.site.lazy_load_categories
+      ? Category.asyncFindBySlugPath(params.slug, { includePermissions: true })
+      : Category.reloadCategoryWithPermissions(params, this.store, this.site);
   },
 
   afterModel(model) {

app/assets/javascripts/discourse/tests/acceptance/category-edit-test.js

@@ -145,6 +145,36 @@ acceptance("Category Edit", function (needs) {
     assert.deepEqual(removePayload.allowed_tag_groups, []);
   });
 
+  test("Editing parent category (disabled Uncategorized)", async function (assert) {
+    this.siteSettings.allow_uncategorized_topics = false;
+
+    await visit("/c/bug/edit");
+    const categoryChooser = selectKit(".category-chooser");
+    await categoryChooser.expand();
+    await categoryChooser.selectRowByValue(6);
+
+    await categoryChooser.expand();
+
+    const names = [...categoryChooser.rows()].map((row) => row.dataset.name);
+    assert.ok(names.includes("(no category)"));
+    assert.notOk(names.includes("Uncategorized"));
+  });
+
+  test("Editing parent category (enabled Uncategorized)", async function (assert) {
+    this.siteSettings.allow_uncategorized_topics = true;
+
+    await visit("/c/bug/edit");
+    const categoryChooser = selectKit(".category-chooser");
+    await categoryChooser.expand();
+    await categoryChooser.selectRowByValue(6);
+
+    await categoryChooser.expand();
+
+    const names = [...categoryChooser.rows()].map((row) => row.dataset.name);
+    assert.ok(names.includes("(no category)"));
+    assert.notOk(names.includes("Uncategorized"));
+  });
+
   test("Index Route", async function (assert) {
     await visit("/c/bug/edit");
     assert.strictEqual(

app/assets/javascripts/select-kit/addon/components/category-chooser.js

@@ -12,12 +12,13 @@ import ComboBoxComponent from "select-kit/components/combo-box";
 export default ComboBoxComponent.extend({
   pluginApiIdentifiers: ["category-chooser"],
   classNames: ["category-chooser"],
-  allowUncategorizedTopics: setting("allow_uncategorized_topics"),
+  allowUncategorized: setting("allow_uncategorized_topics"),
   fixedCategoryPositionsOnCreate: setting("fixed_category_positions_on_create"),
 
   selectKitOptions: {
     filterable: true,
-    allowUncategorized: false,
+    allowUncategorized: "allowUncategorized",
+    autoInsertNoneItem: false,
     allowSubCategories: true,
     permissionType: PermissionType.FULL,
     excludeCategoryId: null,
@@ -30,6 +31,7 @@ export default ComboBoxComponent.extend({
 
     if (
       this.site.lazy_load_categories &&
+      this.value &&
       !Category.hasAsyncFoundAll([this.value])
     ) {
       // eslint-disable-next-line no-console
@@ -54,10 +56,7 @@ export default ComboBoxComponent.extend({
           I18n.t(isString ? this.selectKit.options.none : "category.none")
         )
       );
-    } else if (
-      this.allowUncategorizedTopics ||
-      this.selectKit.options.allowUncategorized
-    ) {
+    } else if (this.selectKit.options.allowUncategorized) {
       return Category.findUncategorized();
     } else {
       const defaultCategoryId = parseInt(
@@ -94,8 +93,10 @@ export default ComboBoxComponent.extend({
   search(filter) {
     if (this.site.lazy_load_categories) {
       return Category.asyncSearch(this._normalize(filter), {
-        scopedCategoryId: this.selectKit.options?.scopedCategoryId,
-        prioritizedCategoryId: this.selectKit.options?.prioritizedCategoryId,
+        includeUncategorized: this.selectKit.options.allowUncategorized,
+        rejectCategoryIds: [this.selectKit.options.excludeCategoryId],
+        scopedCategoryId: this.selectKit.options.scopedCategoryId,
+        prioritizedCategoryId: this.selectKit.options.prioritizedCategoryId,
       });
     }
 

app/assets/javascripts/select-kit/addon/components/category-drop.js

@@ -24,6 +24,7 @@ export default ComboBoxComponent.extend({
   navigateToEdit: false,
   editingCategory: false,
   editingCategoryTab: null,
+  allowUncategorized: setting("allow_uncategorized_topics"),
 
   selectKitOptions: {
     filterable: true,
@@ -40,7 +41,7 @@ export default ComboBoxComponent.extend({
     displayCategoryDescription: "displayCategoryDescription",
     headerComponent: "category-drop/category-drop-header",
     parentCategory: false,
-    allowUncategorized: setting("allow_uncategorized_topics"),
+    allowUncategorized: "allowUncategorized",
   },
 
   modifyComponentForRow() {

app/controllers/categories_controller.rb

@@ -303,9 +303,17 @@ class CategoriesController < ApplicationController
 
   def find
     categories = []
+    serializer = params[:include_permissions] ? CategorySerializer : SiteCategorySerializer
 
     if params[:ids].present?
       categories = Category.secured(guardian).where(id: params[:ids])
+    elsif params[:slug_path].present?
+      category = Category.find_by_slug_path(params[:slug_path].split("/"))
+      raise Discourse::NotFound if category.blank?
+      guardian.ensure_can_see!(category)
+
+      ancestors = Category.secured(guardian).with_ancestors(category.id).where.not(id: category.id)
+      categories = [*ancestors, category]
     elsif params[:slug_path_with_id].present?
       category = Category.find_by_slug_path_with_id(params[:slug_path_with_id])
       raise Discourse::NotFound if category.blank?
@@ -319,7 +327,7 @@ class CategoriesController < ApplicationController
 
     Category.preload_user_fields!(guardian, categories)
 
-    render_serialized(categories, SiteCategorySerializer, root: :categories, scope: guardian)
+    render_serialized(categories, serializer, root: :categories, scope: guardian)
   end
 
   def search
@@ -333,8 +341,12 @@ class CategoriesController < ApplicationController
           true
         end
       )
-    select_category_ids = params[:select_category_ids].presence
-    reject_category_ids = params[:reject_category_ids].presence
+    if params[:select_category_ids].is_a?(Array)
+      select_category_ids = params[:select_category_ids].map(&:presence)
+    end
+    if params[:reject_category_ids].is_a?(Array)
+      reject_category_ids = params[:reject_category_ids].map(&:presence)
+    end
     include_subcategories =
       if params[:include_subcategories].present?
         ActiveModel::Type::Boolean.new.cast(params[:include_subcategories])

spec/requests/categories_controller_spec.rb

@@ -1217,6 +1217,12 @@ RSpec.describe CategoriesController do
         expect(response.parsed_body["categories"].size).to eq(1)
         expect(response.parsed_body["categories"].map { |c| c["name"] }).to contain_exactly("Foo")
       end
+
+      it "works with empty categories list" do
+        get "/categories/search.json", params: { select_category_ids: [""] }
+
+        expect(response.parsed_body["categories"].size).to eq(0)
+      end
     end
 
     context "with reject_category_ids" do
@@ -1230,6 +1236,18 @@ RSpec.describe CategoriesController do
           "Foobar",
         )
       end
+
+      it "works with empty categories list" do
+        get "/categories/search.json", params: { reject_category_ids: [""] }
+
+        expect(response.parsed_body["categories"].size).to eq(4)
+        expect(response.parsed_body["categories"].map { |c| c["name"] }).to contain_exactly(
+          "Uncategorized",
+          "Foo",
+          "Foobar",
+          "Notfoo",
+        )
+      end
     end
 
     context "with include_subcategories" do