如何在rails中将数组保存到数据库
问题描述：
如果我有这样的参数:
params["scholarship"] = {"name"=>"test", "state_ids"=>["1", "2", "3", "4"]}
当我创建对象到数据库字段 state_id 时没有保存到数据库?
and when i create object to database field state_id not save to database?
如何以格式保存到数据库:
how to save to database with format :
#<Scholarship id: 1, name: "test", state_id: "["1", "2", "3", "4"]">
怎么做?
谢谢
答
例如:
class User < ActiveRecord::Base
serialize :scholarship
end
user = User.create(:scholarship=> { "name" => "test", "state_ids" => ["1", "2"]})
User.find(user.id).scholarship# => { "name" => "test", "state_ids" => ["1", "2"] }