Add column named prefecture_id in dojos table

Author: nalabjp

db/migrate/20171103042807_add_prefecture_id_to_dojo.rb

@@ -0,0 +1,5 @@
+class AddPrefectureIdToDojo < ActiveRecord::Migration[5.1]
+  def change
+    add_column :dojos, :prefecture_id, :integer
+  end
+end

db/schema.rb

@@ -32,6 +32,7 @@
     t.text "tags"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.integer "prefecture_id"
   end
 
   create_table "event_histories", force: :cascade do |t|