將值添加到Ruby JSON對象

Question

我正在使用Ruby on Rails。我有JSON對象像這樣在我的數據庫：

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

我希望通過添加其他記錄更新此，它應該是這樣的：

​​

我怎樣才能做到這一點？

Answer 1

你可以試試這個

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（或滑軌5屬性API），該值將已經被轉換成哈希值。

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