Fix wrong issues appears at Dashboard#issues page

Filtering service used klass instead of passed items.
Because of this you see list of all issues intead of authorized ones.
This commit fixes it so people see only issues they are authorized to
see.
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/dashboard_controller.rb

@@ -54,12 +54,12 @@ class DashboardController < ApplicationController
 
   def merge_requests
     @merge_requests = FilteringService.new.execute(MergeRequest, current_user, params)
-    @merge_requests = @merge_requests.recent.page(params[:page]).per(20)
+    @merge_requests = @merge_requests.page(params[:page]).per(20)
   end
 
   def issues
     @issues = FilteringService.new.execute(Issue, current_user, params)
-    @issues = @issues.recent.page(params[:page]).per(20)
+    @issues = @issues.page(params[:page]).per(20)
     @issues = @issues.includes(:author, :project)
 
     respond_to do |format|

app/models/concerns/issuable.rb

@@ -48,13 +48,13 @@ module Issuable
 
     def sort(method)
       case method.to_s
-      when 'newest' then reorder('created_at DESC')
-      when 'oldest' then reorder('created_at ASC')
-      when 'recently_updated' then reorder('updated_at DESC')
-      when 'last_updated' then reorder('updated_at ASC')
+      when 'newest' then reorder("#{table_name}.created_at DESC")
+      when 'oldest' then reorder("#{table_name}.created_at ASC")
+      when 'recently_updated' then reorder("#{table_name}.updated_at DESC")
+      when 'last_updated' then reorder("#{table_name}.updated_at ASC")
       when 'milestone_due_soon' then joins(:milestone).reorder("milestones.due_date ASC")
       when 'milestone_due_later' then joins(:milestone).reorder("milestones.due_date DESC")
-      else reorder('created_at DESC')
+      else reorder("#{table_name}.created_at DESC")
       end
     end
   end

app/services/filtering_service.rb

@@ -57,11 +57,11 @@ class FilteringService
   def by_scope(items)
     case params[:scope]
     when 'created-by-me', 'authored' then
-      klass.where(author_id: current_user.id)
+      items.where(author_id: current_user.id)
     when 'all' then
-      klass
+      items
     when 'assigned-to-me' then
-      klass.where(assignee_id: current_user.id)
+      items.where(assignee_id: current_user.id)
     else
       raise 'You must specify default scope'
     end