Boards - Do not create backlog list if hidden

When backlog list is hidden using board config, it shouldn't get created

app/assets/javascripts/boards/models/list.js

-/* eslint-disable no-underscore-dangle, class-methods-use-this */
+/* eslint-disable class-methods-use-this */
 import { __ } from '~/locale';
 import ListLabel from './label';
 import ListAssignee from './assignee';
@@ -34,7 +34,6 @@ const TYPES = {
 class List {
   constructor(obj) {
     this.id = obj.id;
-    this._uid = this.guid();
     this.position = obj.position;
     this.title = (obj.list_type || obj.listType) === 'backlog' ? __('Open') : obj.title;
     this.type = obj.list_type || obj.listType;

app/assets/javascripts/boards/stores/actions.js

 import Cookies from 'js-cookie';
 import { pick } from 'lodash';
+
+import boardListsQuery from 'ee_else_ce/boards/queries/board_lists.query.graphql';
 import { __ } from '~/locale';
 import { parseBoolean } from '~/lib/utils/common_utils';
 import createGqClient, { fetchPolicies } from '~/lib/graphql';
@@ -15,7 +17,6 @@ import {
 import boardStore from '~/boards/stores/boards_store';
 
 import listsIssuesQuery from '../queries/lists_issues.query.graphql';
-import boardListsQuery from '../queries/board_lists.query.graphql';
 import createBoardListMutation from '../queries/board_list_create.mutation.graphql';
 import updateBoardListMutation from '../queries/board_list_update.mutation.graphql';
 import issueMoveListMutation from '../queries/issue_move_list.mutation.graphql';
@@ -76,10 +77,10 @@ export default {
         variables,
       })
       .then(({ data }) => {
-        const { lists } = data[boardType]?.board;
+        const { lists, hideBacklogList } = data[boardType]?.board;
         commit(types.RECEIVE_BOARD_LISTS_SUCCESS, formatBoardLists(lists));
-        // Backlog list needs to be created if it doesn't exist
-        if (!lists.nodes.find(l => l.listType === ListType.backlog)) {
+        // Backlog list needs to be created if it doesn't exist and it's not hidden
+        if (!lists.nodes.find(l => l.listType === ListType.backlog) && !hideBacklogList) {
           dispatch('createList', { backlog: true });
         }
         dispatch('showWelcomeList');

ee/app/assets/javascripts/boards/queries/board_lists.query.graphql

+#import "ee_else_ce/boards/queries/board_list.fragment.graphql"
+
+query ListIssues(
+  $fullPath: ID!
+  $boardId: ID!
+  $filters: BoardIssueInput
+  $isGroup: Boolean = false
+  $isProject: Boolean = false
+) {
+  group(fullPath: $fullPath) @include(if: $isGroup) {
+    board(id: $boardId) {
+      hideBacklogList
+      lists(issueFilters: $filters) {
+        nodes {
+          ...BoardListFragment
+        }
+      }
+    }
+  }
+  project(fullPath: $fullPath) @include(if: $isProject) {
+    board(id: $boardId) {
+      hideBacklogList
+      lists(issueFilters: $filters) {
+        nodes {
+          ...BoardListFragment
+        }
+      }
+    }
+  }
+}

spec/frontend/boards/stores/actions_spec.js

@@ -13,7 +13,7 @@ import actions, { gqlClient } from '~/boards/stores/actions';
 import * as types from '~/boards/stores/mutation_types';
 import { inactiveId, ListType } from '~/boards/constants';
 import issueMoveListMutation from '~/boards/queries/issue_move_list.mutation.graphql';
-import { fullBoardId, formatListIssues } from '~/boards/boards_util';
+import { fullBoardId, formatListIssues, formatBoardLists } from '~/boards/boards_util';
 
 const expectNotImplemented = action => {
   it('is not implemented', () => {
@@ -78,6 +78,80 @@ describe('setActiveId', () => {
   });
 });
 
+describe('fetchLists', () => {
+  const state = {
+    endpoints: {
+      fullPath: 'gitlab-org',
+      boardId: 1,
+    },
+    filterParams: {},
+    boardType: 'group',
+  };
+
+  let queryResponse = {
+    data: {
+      group: {
+        board: {
+          hideBacklogList: true,
+          lists: {
+            nodes: [mockLists[1]],
+          },
+        },
+      },
+    },
+  };
+
+  const formattedLists = formatBoardLists(queryResponse.data.group.board.lists);
+
+  it('should commit mutations RECEIVE_BOARD_LISTS_SUCCESS on success', done => {
+    jest.spyOn(gqlClient, 'query').mockResolvedValue(queryResponse);
+
+    testAction(
+      actions.fetchLists,
+      {},
+      state,
+      [
+        {
+          type: types.RECEIVE_BOARD_LISTS_SUCCESS,
+          payload: formattedLists,
+        },
+      ],
+      [{ type: 'showWelcomeList' }],
+      done,
+    );
+  });
+
+  it('dispatch createList action when backlog list does not exist and is not hidden', done => {
+    queryResponse = {
+      data: {
+        group: {
+          board: {
+            hideBacklogList: false,
+            lists: {
+              nodes: [mockLists[1]],
+            },
+          },
+        },
+      },
+    };
+    jest.spyOn(gqlClient, 'query').mockResolvedValue(queryResponse);
+
+    testAction(
+      actions.fetchLists,
+      {},
+      state,
+      [
+        {
+          type: types.RECEIVE_BOARD_LISTS_SUCCESS,
+          payload: formattedLists,
+        },
+      ],
+      [{ type: 'createList', payload: { backlog: true } }, { type: 'showWelcomeList' }],
+      done,
+    );
+  });
+});
+
 describe('showWelcomeList', () => {
   it('should dispatch addList action', done => {
     const state = {