将值添加到Ruby JSON对象

Question

我正在使用Ruby on Rails。我有JSON对象像这样在我的数据库：

{"data":[ 
    {"name":"A", "available":"1"}, 
    {"name":"B", "available":"0"} 
]} 

我希望通过添加其他记录更新此，它应该是这样的：

​​

我怎样才能做到这一点？

Answer 1

你可以试试这个

json = { "data" => [ 
     {"name" => "A", "available" => "1"}, 
     {"name" => "B", "available" => "0"} 
     ]} 
json["data"].push({"name" => "C", "available" => "1"}) 

Answer 2

如果您正在使用ActiveRecord Serialize（或滑轨5属性API），该值将已经被转换成哈希值。

class Model 
serialize :some_field, JSON 
end 

record = Model.find(id) 

record.some_field ==> 
{"data":[ 
    {"name":"A", "available":"1"}, 
    {"name":"B", "available":"0"} 
]} 

record.some_field["data"] << {"name" => "C", "available" => "1"} 
record.save