Code improvements

app/models/board.rb

@@ -7,7 +7,6 @@ class Board < ActiveRecord::Base
 
   validates :name, presence: true
 
-  # if block needed only for EE which has group boards feature
   validates :project, presence: true, if: -> { respond_to?(:group_id) && !group }
 
   def backlog_list

app/models/concerns/relative_positioning.rb

@@ -11,7 +11,7 @@ module RelativePositioning
   end
 
   def project_ids
-    project.id
+    [project.id]
   end
 
   def max_relative_position

app/views/shared/boards/_switcher.html.haml

 - parent = board.parent
 - milestone_filter_opts = { format: :json }
-- milestone_filter_opts = milestone_filter_opts.merge(only_group_milestones: true) if board.is_group_board?
+- milestone_filter_opts = milestone_filter_opts.merge(only_group_milestones: true) if board.group_board?
 
 %boards-selector{ "inline-template" => true,
   ":current-board" => current_board_json,

app/views/shared/boards/components/sidebar/_milestone.html.haml

 - milestone_filter_opts = { format: :json }
-- milestone_filter_opts = milestone_filter_opts.merge(only_group_milestones: true) if board.is_group_board?
+- milestone_filter_opts = milestone_filter_opts.merge(only_group_milestones: true) if board.group_board?
 
 .block.milestone
   .title

doc/user/group/issue_boards.md

 # Group issue board
 
-> Introduced in GitLab 9.5.
+> Introduced in GitLab 10.0.
 
 Group issue boards help users manage teams in organizations
 that have a team-centered or product-centered approach which spans
@@ -8,7 +8,7 @@ many projects.
 
 ![Group Issue Board](img/group_issue_board.png)
 
-The design and functionality are the same of [project boards](../project/issue_board.md) with some small differences:  
+The design and functionality are the same as [project boards](../project/issue_board.md) with some small differences:  
 
 * In a group board all issues within group projects will be displayed 
 on backlog or closed lists. Users don't need to filter them by project on search bar.

ee/app/controllers/ee/boards/issues_controller.rb

@@ -2,15 +2,13 @@ module EE
   module Boards
     module IssuesController
       def issues_finder
-        if board.is_group_board?
-          IssuesFinder.new(current_user, group_id: board_parent.id)
-        else
-          super
-        end
+        return super unless board.group_board?
+
+        IssuesFinder.new(current_user, group_id: board_parent.id)
       end
 
       def project
-        @project ||= board.is_group_board? ? super : board.parent
+        @project ||= board.group_board? ? super : board.parent
       end
     end
   end

ee/app/controllers/ee/boards_responses.rb

@@ -3,13 +3,13 @@ module EE
     # Shared authorizations between projects and groups which
     # have different policies on EE.
     def authorize_read_list
-      ability = board.is_group_board? ? :read_group : :read_list
+      ability = board.group_board? ? :read_group : :read_list
 
       authorize_action_for!(board.parent, ability)
     end
 
     def authorize_read_issue
-      ability = board.is_group_board? ? :read_group : :read_issue
+      ability = board.group_board? ? :read_group : :read_issue
 
       authorize_action_for!(board.parent, ability)
     end

ee/app/helpers/ee/boards_helper.rb

@@ -6,7 +6,7 @@ module EE
     end
 
     def build_issue_link_base
-      return super unless @board.is_group_board?
+      return super unless @board.group_board?
 
       "/#{@board.group.path}/:project_path/issues"
     end
@@ -17,7 +17,7 @@ module EE
 
     def board_path(board)
       @board_path ||= begin
-        if board.is_group_board?
+        if board.group_board?
           group_board_path(current_board_parent, board)
         else
           super(board)

ee/app/models/concerns/ee/relative_positioning.rb

@@ -12,11 +12,9 @@ module EE
     end
 
     def project_ids
-      if has_group_boards?
-        board_group.projects.pluck(:id)
-      else
-        super
-      end
+      return super unless has_group_boards?
+
+      board_group.projects.select(:id)
     end
   end
 end

ee/app/models/ee/board.rb

@@ -23,7 +23,7 @@ module EE
       @parent ||= group || project
     end
 
-    def is_group_board?
+    def group_board?
       group_id.present?
     end
 

ee/app/services/ee/boards/lists/create_service.rb

@@ -3,7 +3,7 @@ module EE
     module Lists
       module CreateService
         def available_labels_for(board)
-          if board.is_group_board?
+          if board.group_board?
             parent.labels
           else
             super

ee/app/services/ee/boards/move_service.rb

@@ -5,7 +5,7 @@ module EE
         label_ids =
           if moving_to_list.movable?
             moving_from_list.label_id
-          elsif board.is_group_board?
+          elsif board.group_board?
             ::Label.on_group_boards(parent.id).pluck(:label_id)
           else
             ::Label.on_project_boards(parent.id).pluck(:label_id)