Ruby on rails 如何编写一个方法来获取JSON数据并对其进行解析，然后保存到数据库中

我试图像这样将数据库中的数据呈现到_json，效果很好

  def getOrderDetails
    #To get the details of a particular guest_order and its batches and items
    @guest_order = GuestOrder.find(params[:id])
    render json: @guest_order.to_json(except: [:created_at, :updated_at], 
            include: {order_batches: {except: [:guest_order_id, :created_at, :updated_at], 
            include: {order_items: {except: [:order_batch_id, :created_at, :updated_at] } }
                }
              }
            )
  end

但是，我不知道如何编写一个方法来获取json数据并对其进行解析，然后更新到数据库中

如果我像这样从手机发送json数据

 Parameters:{"updateStatus" => "{\"itemId\":1,\"status\":\"accepted\",\"statusTime\":\"2012-04-25 18:28:30\",\"batchId\":5}"}

# == Schema Information
#
# Table name: order_items
#
#  id             :integer         not null, primary key
#  quantity       :integer
#  accepted       :datetime
#  cooking        :datetime
#  ready          :datetime
#  delivered      :datetime
#  cancelled      :datetime
#  order_batch_id :integer
#  dish_id        :integer
#  created_at     :datetime
#  updated_at     :datetime
#

这里的状态是接受、烹饪、准备、交付、取消。statusTime是特定状态的值

如何获取这些数据并解析，然后更新到数据库中的下表中

def updateStatus

  # How to parse json and save in database

end

表模式如下所示

 Parameters:{"updateStatus" => "{\"itemId\":1,\"status\":\"accepted\",\"statusTime\":\"2012-04-25 18:28:30\",\"batchId\":5}"}

# == Schema Information
#
# Table name: order_items
#
#  id             :integer         not null, primary key
#  quantity       :integer
#  accepted       :datetime
#  cooking        :datetime
#  ready          :datetime
#  delivered      :datetime
#  cancelled      :datetime
#  order_batch_id :integer
#  dish_id        :integer
#  created_at     :datetime
#  updated_at     :datetime
#

---

提前感谢。

Rails将根据请求中的查询参数创建一个哈希

如果您以正确的格式发出请求，Rails参数散列将包含以下数据

puts params.inspect
=>
{ "order_items" => { "id" => 9, "cooking" => "2012-03-11 15:16:15.0000" }, :action => "action_name", etc }

实际上，您根本不需要解析json

def updateStatus
  @order_item = OrderItem.create(params[:order_items])
  respond_to do |format|
    format.json { render @order_item }
  end
end

---

Rails将根据请求中的查询参数创建哈希

如果您以正确的格式发出请求，Rails参数散列将包含以下数据

puts params.inspect
=>
{ "order_items" => { "id" => 9, "cooking" => "2012-03-11 15:16:15.0000" }, :action => "action_name", etc }

实际上，您根本不需要解析json

def updateStatus
  @order_item = OrderItem.create(params[:order_items])
  respond_to do |format|
    format.json { render @order_item }
  end
end

尝试：

安装json gem

data = JSON.parse(params[:data])
new_record = OrderItem.new(data[:order_items]) 
new_record.save

尝试：

安装json gem

data = JSON.parse(params[:data])
new_record = OrderItem.new(data[:order_items]) 
new_record.save