Rails form using GET request: How to remove button and utf8 params?

Question

I'm just trying to create a simple select menu that takes you to a specific URL. So far I have something like this:

# haml
= form_tag new_something_path, method: :get do
  = select_tag :type, options_for_select(my_array)
  = submit_tag 'New Something'

However, when I submit the form I get the UTF8 parameter as well as a "commit" parameter with the text of the button.

How can I remove the UTF8 and commit parameters?

This has been answered here: http://stackoverflow.com/a/4488837/523568 Short answer: You shouldn't remove the UTF-8 parameter. Also, you can't get rid of the commit parameter, given that part of the encapsulating form tag. You can change submit_tag's name with `submit_tag name: "whatever", "New Something"` — Tim Dorr, Mar 28 '13 at 19:34
Yeah, I understand the purpose of the UTF-8 param, but in this case I don't need it because I know the form values will never include any special characters. So I would still like to know how to remove it. — Andrew, Mar 28 '13 at 20:02
Does this answer your question? [Removing "utf8=✓" from Rails 3 form submissions](https://stackoverflow.com/questions/4487796/removing-utf8-from-rails-3-form-submissions) — Duke, Mar 11 '20 at 03:27

score 45 · Answer 1 · edited May 23 '17 at 12:17

45

Removing the commit param is relatively simple, you need to specify that the input does not have a name:

submit_tag 'New Something', name: nil

Regarding the UTF-8 param...it serves an important purpose. Once you understand the purpose of the Rails UTF-8 param, and for some reason you still need to remove it, the solution is easier than you think...just don't use the form_tag helper:

# haml
%form{action: new_something_path, method: 'get'}
  = select_tag :type, options_for_select(my_array)
  = submit_tag 'New Something', name: nil

edited May 23 '17 at 12:17

Community

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answered Mar 29 '13 at 02:55

Andrew

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In rails 4.1 introduced new option for form_tag – enforce_utf8. You can set it to false. – Dmitriy Aug 10 '14 at 17:35

score 2 · Answer 2 · answered Jul 11 '19 at 14:05

You can get rid of the utf8 param by adding the enforce_utf8: false option of form_tag (and also form_form) like the following:

= form_tag new_something_path, method: :get, enforce_utf8: false do

(thanks to @Dmitry for pointing that out)

But please make sure you don't need it: What is the _snowman param in Ruby on Rails 3 forms for? (I'm not sure if it is actually relevant for GET forms.)

The additional parameter is generated by the submit button can be removed by setting the name: false option on your submit_tag (Also works for submit in case of form_for).

= submit_tag 'New Something', name: nil

Rails form using GET request: How to remove button and utf8 params?

2 Answers2