How can you have a hidden field with simple form?
The following code:
= simple_form_for @movie do |f|
= f.hidden :title, "some value"
= f.button :submit
results in this error:
undefined method `hidden' for #SimpleForm::FormBuilder:0x000001042b7cd0
try this
= f.input :title, :as => :hidden, :input_html => { :value => "some value" }
= f.input :title, :as => :hidden, :input_html => { :value => "some value" }
Commented
Mar 20, 2011 at 21:14
simple_form way to do hidden inputs, however, if only a hidden input is needed, then just use Rails' hidden_field form builder since Simple Form inherits all the form builder methods.
Shortest Yet !!!
=f.hidden_field :title, :value => "some value"
Shorter, DRYer and perhaps more obvious.
Of course with ruby 1.9 and the new hash format we can go 3 characters shorter with...
=f.hidden_field :title, value: "some value"
input_html key, this did not seem to work as expected. The accepted answer worked better
Commented
May 1, 2023 at 2:39
= f.input_field :title, as: :hidden, value: "some value"
Is also an option. Note, however, that it skips any wrapper defined for your form builder.
Correct way (if you are not trying to reset the value of the hidden_field input) is:
f.hidden_field :method, :value => value_of_the_hidden_field_as_it_comes_through_in_your_form
Where :method is the method that when called on the object results in the value you want
So following the example above:
= simple_form_for @movie do |f|
= f.hidden :title, "some value"
= f.button :submit
The code used in the example will reset the value (:title) of @movie being passed by the form. If you need to access the value (:title) of a movie, instead of resetting it, do this:
= simple_form_for @movie do |f|
= f.hidden :title, :value => params[:movie][:title]
= f.button :submit
Again only use my answer is you do not want to reset the value submitted by the user.
I hope this makes sense.
simple_form_for, the hidden method using here is going to raise an error undefined method hidden' for #<SimpleForm::FormBuilder:0x00007ffa6cde0be8>`
Commented
Jul 2, 2018 at 17:29
None of the above worked perfectly in my case, as they were leaving a blank rectangle on my frontend. What worked for me was -
<%= f.text_field :title, value: "some value", type: "hidden" %>