Add a movable scope and a movable? method to List model

app/controllers/projects/boards/lists_controller.rb

@@ -19,7 +19,7 @@ module Projects
       end
 
       def update
-        list = project.board.lists.find(params[:id])
+        list = project.board.lists.movable.find(params[:id])
         service = ::Boards::Lists::MoveService.new(project, current_user, move_params)
 
         if service.execute(list)
@@ -44,7 +44,7 @@ module Projects
         service = ::Boards::Lists::GenerateService.new(project, current_user)
 
         if service.execute
-          render json: serialize_as_json(project.board.lists.label)
+          render json: serialize_as_json(project.board.lists.movable)
         else
           head :unprocessable_entity
         end

app/models/list.rb

@@ -12,11 +12,16 @@ class List < ActiveRecord::Base
   before_destroy :can_be_destroyed
 
   scope :destroyable, -> { where(list_type: list_types[:label]) }
+  scope :movable, -> { where(list_type: list_types[:label]) }
 
   def destroyable?
     label?
   end
 
+  def movable?
+    label?
+  end
+
   def title
     label? ? label.name : list_type.humanize
   end

app/services/boards/issues/list_service.rb

@@ -3,8 +3,8 @@ module Boards
     class ListService < Boards::BaseService
       def execute
         issues = IssuesFinder.new(user, filter_params).execute
-        issues = without_board_labels(issues) unless list.label?
-        issues = with_list_label(issues) if list.label?
+        issues = without_board_labels(issues) unless list.movable?
+        issues = with_list_label(issues) if list.movable?
         issues
       end
 
@@ -40,7 +40,7 @@ module Boards
       end
 
       def board_label_ids
-        @board_label_ids ||= board.lists.label.pluck(:label_id)
+        @board_label_ids ||= board.lists.movable.pluck(:label_id)
       end
 
       def without_board_labels(issues)

app/services/boards/issues/move_service.rb

@@ -45,10 +45,10 @@ module Boards
 
       def remove_label_ids
         label_ids =
-          if moving_to_list.label?
+          if moving_to_list.movable?
             moving_from_list.label_id
           else
-            board.lists.label.pluck(:label_id)
+            board.lists.movable.pluck(:label_id)
           end
 
         Array(label_ids).compact

app/services/boards/lists/create_service.rb

@@ -10,7 +10,7 @@ module Boards
       private
 
       def next_position
-        max_position = board.lists.label.maximum(:position)
+        max_position = board.lists.movable.maximum(:position)
         max_position.nil? ? 0 : max_position.succ
       end
 

app/services/boards/lists/destroy_service.rb

@@ -13,7 +13,7 @@ module Boards
       private
 
       def decrement_higher_lists(list)
-        board.lists.label.where('position > ?',  list.position)
+        board.lists.movable.where('position > ?',  list.position)
                    .update_all('position = position - 1')
       end
 

app/services/boards/lists/generate_service.rb

@@ -2,7 +2,7 @@ module Boards
   module Lists
     class GenerateService < Boards::BaseService
       def execute
-        return false unless board.lists.label.empty?
+        return false unless board.lists.movable.empty?
 
         List.transaction do
           label_params.each { |params| create_list(params) }

app/services/boards/lists/move_service.rb

@@ -5,7 +5,7 @@ module Boards
         @old_position = list.position
         @new_position = params[:position]
 
-        return false unless list.label?
+        return false unless list.movable?
         return false unless valid_move?
 
         list.with_lock do
@@ -20,7 +20,7 @@ module Boards
 
       def valid_move?
         new_position.present? && new_position != old_position &&
-          new_position >= 0 && new_position < board.lists.label.size
+          new_position >= 0 && new_position < board.lists.movable.size
       end
 
       def reorder_intermediate_lists
@@ -32,13 +32,13 @@ module Boards
       end
 
       def decrement_intermediate_lists
-        board.lists.label.where('position > ?',  old_position)
+        board.lists.movable.where('position > ?',  old_position)
                            .where('position <= ?', new_position)
                            .update_all('position = position - 1')
       end
 
       def increment_intermediate_lists
-        board.lists.label.where('position >= ?', new_position)
+        board.lists.movable.where('position >= ?', new_position)
                            .where('position < ?',  old_position)
                            .update_all('position = position + 1')
       end

spec/models/list_spec.rb

@@ -74,6 +74,26 @@ describe List do
     end
   end
 
+  describe '#movable?' do
+    it 'retruns true when list_type is set to label' do
+      subject.list_type = :label
+
+      expect(subject).to be_movable
+    end
+
+    it 'retruns false when list_type is set to backlog' do
+      subject.list_type = :backlog
+
+      expect(subject).not_to be_movable
+    end
+
+    it 'retruns false when list_type is set to done' do
+      subject.list_type = :done
+
+      expect(subject).not_to be_movable
+    end
+  end
+
   describe '#title' do
     it 'returns label name when list_type is set to label' do
       subject.list_type = :label