Backport MR from EE

app/assets/javascripts/gl_dropdown.js

@@ -468,8 +468,8 @@ GitLabDropdown = (function() {
 
     // Process the data to make sure rendered data
     // matches the correct layout
-    if (this.fullData && hasMultiSelect && this.options.processData) {
     const inputValue = this.filterInput.val();
+    if (this.fullData && hasMultiSelect && this.options.processData && inputValue.length === 0) {
       this.options.processData.call(this.options, inputValue, this.filteredFullData(), this.parseData.bind(this));
     }
 
@@ -740,6 +740,12 @@ GitLabDropdown = (function() {
       $input.attr('id', this.options.inputId);
     }
 
+    if (this.options.multiSelect) {
+      Object.keys(selectedObject).forEach((attribute) => {
+        $input.attr(`data-${attribute}`, selectedObject[attribute]);
+      });
+    }
+
     if (this.options.inputMeta) {
       $input.attr('data-meta', selectedObject[this.options.inputMeta]);
     }

app/assets/javascripts/users_select.js

@@ -35,6 +35,7 @@ function UsersSelect(currentUser, els) {
       options.showCurrentUser = $dropdown.data('current-user');
       options.todoFilter = $dropdown.data('todo-filter');
       options.todoStateFilter = $dropdown.data('todo-state-filter');
+      options.perPage = $dropdown.data('per-page');
       showNullUser = $dropdown.data('null-user');
       defaultNullUser = $dropdown.data('null-user-default');
       showMenuAbove = $dropdown.data('showMenuAbove');
@@ -214,7 +215,36 @@ function UsersSelect(currentUser, els) {
             glDropdown.options.processData(term, users, callback);
           }.bind(this));
         },
-        processData: function(term, users, callback) {
+        processData: function(term, data, callback) {
+          let users = data;
+
+          // Only show assigned user list when there is no search term
+          if ($dropdown.hasClass('js-multiselect') && term.length === 0) {
+            const selectedInputs = getSelectedUserInputs();
+
+            // Potential duplicate entries when dealing with issue board
+            // because issue board is also managed by vue
+            const selectedUsers = _.uniq(selectedInputs, false, a => a.value)
+              .filter((input) => {
+                const userId = parseInt(input.value, 10);
+                const inUsersArray = users.find(u => u.id === userId);
+
+                return !inUsersArray && userId !== 0;
+              })
+              .map((input) => {
+                const userId = parseInt(input.value, 10);
+                const { avatarUrl, avatar_url, name, username } = input.dataset;
+                return {
+                  avatar_url: avatarUrl || avatar_url,
+                  id: userId,
+                  name,
+                  username,
+                };
+              });
+
+            users = data.concat(selectedUsers);
+          }
+
           let anyUser;
           let index;
           let j;
@@ -645,7 +675,7 @@ UsersSelect.prototype.users = function(query, options, callback) {
     url: url,
     data: {
       search: query,
-      per_page: 20,
+      per_page: options.perPage || 20,
       active: true,
       project_id: options.projectId || null,
       group_id: options.groupId || null,

app/controllers/autocomplete_controller.rb

@@ -9,7 +9,7 @@ class AutocompleteController < ApplicationController
     @users = @users.where.not(id: params[:skip_users]) if params[:skip_users].present?
     @users = @users.active
     @users = @users.reorder(:name)
-    @users = @users.page(params[:page])
+    @users = @users.page(params[:page]).per(params[:per_page])
 
     if params[:todo_filter].present? && current_user
       @users = @users.todo_authors(current_user.id, params[:todo_state_filter])

app/views/projects/boards/components/sidebar/_assignee.html.haml

@@ -14,7 +14,10 @@
         name: "issue[assignee_ids][]",
         ":value" => "assignee.id",
         "v-if" => "issue.assignees",
-        "v-for" => "assignee in issue.assignees" }
+        "v-for" => "assignee in issue.assignees",
+        ":data-avatar_url" => "assignee.avatar",
+        ":data-name" => "assignee.name",
+        ":data-username" => "assignee.username" }
       .dropdown
         %button.dropdown-menu-toggle.js-user-search.js-author-search.js-multiselect.js-save-user-data.js-issue-board-sidebar{ type: "button", ref: "assigneeDropdown", data: { toggle: "dropdown", field_name: "issue[assignee_ids][]", first_user: (current_user.username if current_user), current_user: "true", project_id: @project.id, null_user: "true", multi_select: "true", 'max-select' => 1, dropdown: { header: 'Assignee' } },
           ":data-issuable-id" => "issue.id",

app/views/shared/issuable/_sidebar_assignees.html.haml

@@ -32,7 +32,7 @@
 
 .selectbox.hide-collapsed
   - issuable.assignees.each do |assignee|
-    = hidden_field_tag "#{issuable.to_ability_name}[assignee_ids][]", assignee.id, id: nil
+    = hidden_field_tag "#{issuable.to_ability_name}[assignee_ids][]", assignee.id, id: nil, data: { avatar_url: assignee.avatar_url, name: assignee.name, username: assignee.username }
 
   - options = { toggle_class: 'js-user-search js-author-search', title: 'Assign to', filter: true, dropdown_class: 'dropdown-menu-user dropdown-menu-selectable dropdown-menu-author', placeholder: 'Search users', data: { first_user: (current_user.username if current_user), current_user: true, project_id: (@project.id if @project), author_id: issuable.author_id, field_name: "#{issuable.to_ability_name}[assignee_ids][]", issue_update: issuable_json_path(issuable), ability_name: issuable.to_ability_name, null_user: true } }
 

app/views/shared/issuable/form/_metadata_issue_assignee.html.haml

@@ -2,7 +2,7 @@
 .col-sm-10{ class: ("col-lg-8" if has_due_date) }
   .issuable-form-select-holder.selectbox
     - issuable.assignees.each do |assignee|
-      = hidden_field_tag "#{issuable.to_ability_name}[assignee_ids][]", assignee.id, id: nil, data: { meta: assignee.name }
+      = hidden_field_tag "#{issuable.to_ability_name}[assignee_ids][]", assignee.id, id: nil, data: { meta: assignee.name, avatar_url: assignee.avatar_url, name: assignee.name, username: assignee.username }
 
     - if issuable.assignees.length === 0
       = hidden_field_tag "#{issuable.to_ability_name}[assignee_ids][]", 0, id: nil, data: { meta: '' }

spec/controllers/autocomplete_controller_spec.rb

@@ -97,6 +97,20 @@ describe AutocompleteController do
       it { expect(body.size).to eq User.count }
     end
 
+    context 'limited users per page' do
+      let(:per_page) { 2 }
+
+      before do
+        sign_in(user)
+        get(:users, per_page: per_page)
+      end
+
+      let(:body) { JSON.parse(response.body) }
+
+      it { expect(body).to be_kind_of(Array) }
+      it { expect(body.size).to eq per_page }
+    end
+
     context 'unauthenticated user' do
       let(:public_project) { create(:project, :public) }
       let(:body) { JSON.parse(response.body) }

spec/features/issues/form_spec.rb

@@ -3,6 +3,7 @@ require 'rails_helper'
 describe 'New/edit issue', :feature, :js do
   include GitlabRoutingHelper
   include ActionView::Helpers::JavaScriptHelper
+  include FormHelper
 
   let!(:project)   { create(:project) }
   let!(:user)      { create(:user)}
@@ -23,6 +24,67 @@ describe 'New/edit issue', :feature, :js do
       visit new_namespace_project_issue_path(project.namespace, project)
     end
 
+    describe 'shorten users API pagination limit' do
+      before do
+        allow_any_instance_of(FormHelper).to receive(:issue_dropdown_options).and_wrap_original do |original, *args|
+          issuable = *args[0]
+          has_multiple_assignees = *args[1]
+
+          options = {
+            toggle_class: 'js-user-search js-assignee-search js-multiselect js-save-user-data',
+            title: 'Select assignee',
+            filter: true,
+            dropdown_class: 'dropdown-menu-user dropdown-menu-selectable dropdown-menu-assignee',
+            placeholder: 'Search users',
+            data: {
+              per_page: 1,
+              null_user: true,
+              current_user: true,
+              project_id: project.try(:id),
+              field_name: "issue[assignee_ids][]",
+              default_label: 'Assignee',
+              'max-select': 1,
+              'dropdown-header': 'Assignee',
+              multi_select: true,
+              'input-meta': 'name',
+              'always-show-selectbox': true,
+            }
+          }
+
+
+          if has_multiple_assignees
+            options[:title] = 'Select assignee(s)'
+            options[:data][:'dropdown-header'] = 'Assignee(s)'
+            options[:data].delete(:'max-select')
+          end
+
+          options
+        end
+
+        visit new_namespace_project_issue_path(project.namespace, project)
+
+        click_button 'Unassigned'
+
+        wait_for_requests
+      end
+
+      it 'should display selected users even if they are not part of the original API call' do
+        find('.dropdown-input-field').native.send_keys user2.name
+
+        page.within '.dropdown-menu-user' do
+          expect(page).to have_content user2.name
+          click_link user2.name
+        end
+
+        find('.js-dropdown-input-clear').click
+
+        page.within '.dropdown-menu-user' do
+          expect(page).to have_content user.name
+          expect(find('.dropdown-menu-user a.is-active').first(:xpath, '..')['data-user-id']).to eq(user2.id.to_s)
+        end
+      end
+    end
+
     describe 'single assignee' do
       before do
         click_button 'Unassigned'

spec/features/issues/issue_sidebar_spec.rb

@@ -57,6 +57,23 @@ feature 'Issue Sidebar', feature: true do
         expect(page.find('.dropdown-menu-user-link.is-active')).to have_content(user.name)
       end
     end
+
+    it 'keeps your filtered term after filtering and dismissing the dropdown' do
+      find('.dropdown-input-field').native.send_keys user2.name
+
+      wait_for_requests
+
+      page.within '.dropdown-menu-user' do
+        expect(page).not_to have_content 'Unassigned'
+        click_link user2.name
+      end
+
+      find('.js-right-sidebar').click
+      find('.block.assignee .edit-link').click
+
+      expect(page.all('.dropdown-menu-user li').length).to eq(1)
+      expect(find('.dropdown-input-field').value).to eq(user2.name)
+    end
   end
 
   context 'as a allowed user' do