CE backport - Allow viewing only one board when multiple issue boards is not enabled

app/controllers/groups/boards_controller.rb

@@ -2,19 +2,24 @@ class Groups::BoardsController < Groups::ApplicationController
   include BoardsResponses
 
   before_action :assign_endpoint_vars
+  before_action :boards, only: :index
 
   def index
-    @boards = Boards::ListService.new(group, current_user).execute
-
     respond_with_boards
   end
 
   def show
-    @board = group.boards.find(params[:id])
+    @board = boards.find(params[:id])
 
     respond_with_board
   end
 
+  private
+
+  def boards
+    @boards ||= Boards::ListService.new(group, current_user).execute
+  end
+
   def assign_endpoint_vars
     @boards_endpoint = group_boards_url(group)
     @namespace_path = group.to_param

app/controllers/projects/boards_controller.rb

@@ -4,22 +4,25 @@ class Projects::BoardsController < Projects::ApplicationController
 
   before_action :check_issues_available!
   before_action :authorize_read_board!, only: [:index, :show]
+  before_action :boards, only: :index
   before_action :assign_endpoint_vars
 
   def index
-    @boards = Boards::ListService.new(project, current_user).execute
-
     respond_with_boards
   end
 
   def show
-    @board = project.boards.find(params[:id])
+    @board = boards.find(params[:id])
 
     respond_with_board
   end
 
   private
 
+  def boards
+    @boards ||= Boards::ListService.new(project, current_user).execute
+  end
+
   def assign_endpoint_vars
     @boards_endpoint = project_boards_path(project)
     @bulk_issues_path = bulk_update_project_issues_path(project)