Question

我正在开发Ruby on Rails。我在我的数据库中有这样的JSON对象：

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

我想通过添加另一条记录来更新它，它应该如下所示：

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

我该怎么做？

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

如果您使用的是ActiveRecord Serialize（或者Rails 5属性api），则该值将已转换为哈希值。

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

将值添加到Ruby JSON对象

2 个答案: