ruby-on-rails - 将 Ruby 哈希隐藏到哈希数组

Question

将 Ruby Hash 转换为parse.com中使用的以下哈希格式：

[{
    "__type": "Pointer",
    "className": "Tag",
    "objectId": "DLAPiFlMYL"
}, {
    "__type": "Pointer",
    "className": "Tag",
    "objectId": "trIItAa4bJ"
}]

---

输入：

{: __type = > "Pointer",
    : className = > "Tag",
    : objectId = > "DLAPiFlMYL"
}

---

输出：

[{
    "__type": "Pointer",
    "className": "Tag",
    "objectId": "DLAPiFlMYL"
}]

Answer 1

只需使用to_jsonrails提供的方法

{:__type=>"Pointer",:className=>"Tag",:objectId=>"DLAPiFlMYL"}.to_json

Answer 2

您可以使用HashWithIndifferentAccess。

require 'active_support/hash_with_indifferent_access'
my_hash = {:__type=>"Pointer",:className=>"Tag",:objectId=>"DLAPiFlMYL"}
my_hash = HashWithIndifferentAccess.new my_hash
=> {"__type"=>"Pointer", "className"=>"Tag", "objectId"=>"DLAPiFlMYL"}
> my_hash['className']
=> "Tag"
> my_hash[:className]
=> "Tag"