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ruby on rails - rails post parameter is judged by partial match

I am currently creating a web page with Rails.

There are multiple forms that are displayed by turning each do in the page, and the name of hidden_field in it is "XXXX _ # {post.id}".

When POST is performed in this state, the params value will be changed in the form of params [: XXXX_3] or params [: XXXX_25]. I can't get it.

Is it possible to get the value of params with the controller using a method like the prefix of XXXX?

I would appreciate it if you could teach me the right way.
Thank you.

<% = form_with (model: @user_info, url: "/ xxx/yyy", local: true) do | f |%>
                    <% = f.hidden_field "XXXX _ # {post.id}",: value =>''%>
                    <% = f.submit 'Send', id: 'submit_btn'%>
                    <% end%>
rubyonrails
  • Answer # 1

    Since [: XXXX_3] can be obtained with ["XXXX_3"], the same result can be obtained, so put the character string that combines the original id (the _3 part) with XXXX in []. It was solved with.

  • Answer # 2 

    <% = f.hidden_field "XXXX",: value =>post.id%>


    If you change the view side like

    If

    ,

    xxxx_key = nil
# Lick all keys and if key starts with xxxx
params.each do | key, value |
  if key.start_with? ("xxxx_")
    xxxx_key = key
    break
  end
end
if xxxx_key.nil?
  # Error handling
end
puts xxxx_key


    You can force it out if you do
    Since strong parameters cannot be used, you must write your own validation when nil

    ↑ I'm sorry if I had a grammar mistake because I didn't move it

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