simple_form: disable form without adding disabled: true or readonly: true to every input

Question

I have a large simple_form form with fields that need to be enabled or disabled depending upon where the form's partial gets loaded.

My question is: how do you disable every form input quickly using simple_form helpers / wrappers?

Simple Form's documentation explains how disabled: true can be used to disable a single input field:

<%= simple_form_for @user do |f| %>
  <%= f.input :username, disabled: true %>
  <%= f.button :submit %>
<% end %>

But the documentation is less clear on how I can disable an entire form via simple_form helpers without needing to repeat disabled: true on literally every form input.

I tried passing disabled: true and readonly: true to simple_form's :wrapper_mappings option, but that isn't working.

---

Example Code:

I load the form via a partial to define simple_form display variables. This works:

#user/show.html.erb:
<%= render partial: 'shared/form', locals: {questionnaire: @questionnaire, readonly_state: true, disabled_state: true, bootstrap_form_class: 'form-horizontal'} %>

However, readonly_state and disabled_state do not work unless I pass them to every form input:

# shared/_form.html.erb
<%= simple_form_for(@questionnaire, :html => {:class => bootstrap_form_class}, 

:wrapper_mappings => {check_boxes: :vertical_radio_and_checkboxes, file: :vertical_file_input,
boolean: :vertical_boolean  }) do |f| %>

  <%= f.input :username, disabled: disabled_state, hint: 'You cannot change your username.' %>
  <%= f.input :email, disabled: disabled_state %>
  <%= f.input :city, disabled: disabled_state %>
  <%= f.input :country, disabled: disabled_state %>
  . . .
  <%= f.button :submit %>
<% end %>

---

You can quickly see how repetitious this gets with a large form.

How do I toggle disable and readonly form attributes quickly across an entire form using DRY code?

Answer 1

You can create a custom wrapper that disables the input like this:

# config/initializers/simple_form.rb
config.wrappers :disabled_form do |b|
  b.use :input, disabled: true, readonly: true
end

And in the form use:

<%= simple_form_for @model, wrapper: :disabled_form %>
  <%= f.input :field %>
  ...
<% end %>

Depending on the amount of different inputs in the form, you might need to create more custom wrappers and use a wrapper_mapping in the disabled form.