Question

我正在使用应用程序的rails 4.2。

以下是我的描述控制器的索引操作。

def index
  @descriptions = Description.all
  if name = params[:name]
    description = @descriptions.where(name: name)
    render json: description
  end
end

当我向浏览器输入http://localhost:3000/descriptions?name=LA时。我可以获得一个名称属性为JSON格式的“LA”的数据。如下。

[{"id":140,"name":"LA","value":"Lakers","api_name_id":113,"created_at":"2015-06-04T17:11:18.649Z","updated_at":"2015-06-04T17:11:18.649Z"}]

但是，如果我在我的网址末尾传递两个参数，如

http://localhost:3000/descriptions?name=LA&name=123

我只能以JSON格式获取名称属性为“123”的数据。

[{"id":143,"name":"123","value":"456","api_name_id":114,"created_at":"2015-06-04T17:20:18.703Z","updated_at":"2015-06-04T17:20:18.703Z"}]

有什么方法可以获得名称属性为“LA”和“123”的所有数据？如下所示

[{"id":143,"name":"123","value":"456","api_name_id":114,"created_at":"2015-06-04T17:20:18.703Z","updated_at":"2015-06-04T17:20:18.703Z"},{"id":140,"name":"LA","value":"Lakers","api_name_id":113,"created_at":"2015-06-04T17:11:18.649Z","updated_at":"2015-06-04T17:11:18.649Z"}]

Answer 1

点击网址：

http://localhost:3000/descriptions?name[]=LA&name[]=123

休息你的代码是完美的。但请记住where将执行SQL IN操作。查看此answer以了解如何使用查询字符串传递数组元素。

Answer 2

也许你想要

unless params.empty?
 description = {}
 params.each do |key, value|
  description.merge(@descriptions.where(name: value)) if key == name
 end
end

如何在url末尾传递多个参数时获取特定数据？

2 个答案: