Migration - Remove position field from issues and merge requests

app/models/issue.rb

@@ -9,6 +9,9 @@ class Issue < ActiveRecord::Base
   include Spammable
   include FasterCacheKeys
   include RelativePositioning
+  include IgnorableColumn
+
+  ignore_column :position
 
   DueDateStruct = Struct.new(:title, :name).freeze
   NoDueDate     = DueDateStruct.new('No Due Date', '0').freeze

app/models/merge_request.rb

@@ -4,6 +4,9 @@ class MergeRequest < ActiveRecord::Base
   include Noteable
   include Referable
   include Sortable
+  include IgnorableColumn
+
+  ignore_column :position
 
   belongs_to :target_project, class_name: "Project"
   belongs_to :source_project, class_name: "Project"

db/post_migrate/20170609183112_remove_position_from_issuables.rb

+class RemovePositionFromIssuables < ActiveRecord::Migration
+  DOWNTIME = false
+
+  def change
+    remove_column :issues, :position, :integer
+    remove_column :merge_requests, :position, :integer
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170607121233) do
+ActiveRecord::Schema.define(version: 20170609183112) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -547,7 +547,6 @@ ActiveRecord::Schema.define(version: 20170607121233) do
     t.integer "project_id"
     t.datetime "created_at"
     t.datetime "updated_at"
-    t.integer "position", default: 0
     t.string "branch_name"
     t.text "description"
     t.integer "milestone_id"
@@ -738,7 +737,6 @@ ActiveRecord::Schema.define(version: 20170607121233) do
     t.integer "target_project_id", null: false
     t.integer "iid"
     t.text "description"
-    t.integer "position", default: 0
     t.datetime "locked_at"
     t.integer "updated_by_id"
     t.text "merge_error"