Change the address of order into a json colum

db/migrate/1_create_shotengai_products_and_orders.rb

@@ -51,7 +51,7 @@ class CreateShotengaiProductsAndOrders < ActiveRecord::Migration[5.1]
   def create_order
     create_table :shotengai_orders do |t|
       t.string :seq
-      t.string :address
+      t.json :address
       t.decimal :amount, precision: 9, scale: 2      
       t.datetime :pay_time 
       t.datetime :delivery_time

lib/shotengai/controller/base.rb

@@ -48,7 +48,6 @@ module Shotengai
       end
       
       before_action :set_resource, except: [:index, :create]
-      respond_to :json
       
       # TODO: could not catch the exception
       respond_to :json

lib/shotengai/web_error.rb

@@ -2,6 +2,7 @@ module Shotengai
   class WebError < RuntimeError
     attr_accessor :message, :code, :status
     def initialize message, code, status
+      super()
       @message, @code, @status = message, code, status
     end
   end