CODEWITHSUNDEEP
ruby-on-railsformsruby-on-rails-4
raphael_turtle
raphael_turtle

Reputation: 7314

Rails form_tag, adding a hidden field

I have a form_tag that takes a code as input:

= form_tag({controller: "charges", action: "new"}, method: "get") do
  = label_tag(:code, "Check code:")
  = text_field_tag(:code)
  = hidden_field :item,  value: @item.id
  = submit_tag("Search")

I want to have a hidden field that adds a certain value to the URL. I basically want to create the URL example.com/charges/new?item=1&code=mycode where '1' is the item id and 'mycode' is the code entered by the user, but I can't get it to work.

Upvotes: 2

Views: 7056

Answers (1)

Jordan Running
Jordan Running

Reputation: 106127

hidden_field and hidden_field_tag are not the same. You want the latter. hidden_field works like text_field and so requires an object (usually inside a form_for). hidden_field_tag, like text_field_tag, does not. This is a pretty common "gotcha" in Rails.

Try this:

= hidden_field_tag "item", @item.id

P.S. If this form is for creating a new model object (from your code I'm guessing it's for creating a Charge object), you probably want to use form_for instead. Something like this:

= form_for :charge do |f|
  = f.label :code, "Check code:"
  = f.text_field :code
  = f.hidden_field :item_id, @item.id
  = f.submit "Search"

This would probably simplify your controller a lot, since in your create action you could just do Charge.create(params). I'm just guessing at what your actual models looks like, but it should give you the right idea. You should read through the form_for docs for more information.

Upvotes: 7

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