Rails中具有散列的未允许参数

Question

I have a hash field in my Rails model and am attempting to update it. The attribute, detail , was first generated through a migration as a text type. Afterwords, in my model, it was set as a hash through the store :detail property

class Request < ActiveRecord::Base
    store :detail
end

My strong_params are as such:

params.require(:request).permit(:name, :action, :detail => {})

However, when my Parameters go through as

Parameters: {"request"=>{"name"=>"temp", "action"=>"create", "detail"=>{"test"=>"fdsf"}}}

I am told that there is an Unpermitted parameter: test , despite the test parameter being part of the detail hash.

How do I fix this? Thanks!

Answer 1

params.require(:request).permit(:name, :action, detail: [:test])

另一个选项（例如，如果您事先不知道可能的字段名称）将在客户端将detail序列化为json字符串，接受它作为字符串并随后反序列化为哈希。

Answer 2

This (rather old) issue tackles your problem quite interestingly

Considering your hash consists of more values than :test you could try the solution with .tap

params.require(:request).permit(:name, :action).tap do |whitelisted|
  whitelisted[:detail] = params[:request][:detail]
end

Or the somewhat less dynamic:

params.require(:request).permit(:name, :action, :detail => [:test])

This blogpost sums up different approaches.

edit

You need your detail column to be of type 'text' to be able to save the hash as a string. In your Request model add this to the top:

serialize :detail

as it will allow to interpret the stringified :detail as a hash