假设你想要

records = Model.all
records.to_a.map{|m| m.serializable_hash(:root => true)}

就像to_json(：root => true)一样

[
  {
    "model": {
      "attribute_1": "value_1","attribute_2": "value_2",}
  }
  ...
]

解决方法

as_json

records.as_json(:root => true)

serializable_hash

records.to_a.map() {|x| 
  { x.class.model_name.element => x.serializable_hash() } 
}

但这不适用于嵌套对象