FormBuildable

Declaratively build FormBuilder classes in Rails. Goes great with TailwindCSS!

Usage

module ApplicationHelper
  include FormBuildable

  define_form_builder :default do
    html_classes do
      button {
        "inline-flex items-center justify-center rounded border shadow-sm font-medium px-4 py-2 text-sm "\
        " border-transparent text-white bg-blue-600 md:text-base lg:text-lg hover:bg-blue-800 "
      }

      form { "space-y-4" }
      field { "flex flex-col gap-2" }

      check_box_input { "w-6 h-6 text-blue-600 bg-gray-100 border-gray-300 rounded" }
      check_box { "flex gap-2 items-center" }
      check_box_label { "text-md" }

      input { "rounded-lg border-slate-300 p-2 text-slate-900 " }

      error_container { "flex justify-start" }
      error { "text-sm text-red-700 font-bold whitespace-pre" }
    end
  end

  define_form_builder :inline do
    # some other classes...
  end
end

Now use in a view with default_form_with or default_form_for

<%= default_form_with model: @user, url: registrations_path do |form| -%>
  <%= form.email_field :email -%>
  <%= form.check_box :accepted_terms -%>
  <%= form.button -%>
<% end -%>

Will produce some HTML like:

<form class="space-y-4" action="/users/registrations" method="post">
  <div class="flex flex-col gap-2">
    <label for="email_email">Email</label>
    <input class="rounded-lg border-slate-300 p-2 text-slate-900" type="email" name="email[email]" id="email_email" />
  </div>
  <div class="flex gap-2 items-center">
    <input name="email[accepted_terms]" type="hidden" value="0" autocomplete="off" />
    <input class="w-6 h-6 text-blue-600 bg-gray-100 border-gray-300 rounded" type="checkbox" value="1" name="email[accepted_terms]" id="email_accepted_terms" />
    <label class="text-md" for="email_accepted_terms">Accepted terms</label>
  </div>
  <button name="button" type="submit" class="inline-flex items-center justify-center rounded border shadow-sm font-medium px-4 py-2 text-sm border-transparent text-white bg-blue-600 md:text-base lg:text-lg hover:bg-blue-800">
    Create User
  </button
</form>

And when there is an error, the model's errors are automatically added to the markup

<form class="space-y-4" action="/registrations" method="post">
  <div class="flex flex-col gap-2">
    <label for="email_address">Address</label><input class="rounded-lg border-slate-300 p-2 text-slate-900" type="email" value="" name="email[address]" id="email_address" />
    <div class="flex justify-start"><p class="text-sm text-red-700 font-bold whitespace-pre" aria-live="polite" id="email-address-error" data-error="email-address-error">Address is invalid</p></div>
  </div>
  <div class="flex gap-2 items-center">
    <input name="email[accepted_terms]" type="hidden" value="0" autocomplete="off" />
    <input class="w-6 h-6 text-blue-600 bg-gray-100 border-gray-300 rounded" type="checkbox" value="1" name="email[accepted_terms]" id="email_accepted_terms" /><label class="text-md" for="email_accepted_terms">Accepted terms</label>
  </div>
  <div class="flex justify-start"><p class="text-sm text-red-700 font-bold whitespace-pre" aria-live="polite" id="email-accepted_terms-error" data-error="email-accepted_terms-error">Accepted terms must be accepted</p></div>
  <button name="button" type="submit" class="inline-flex items-center justify-center rounded border shadow-sm font-medium px-4 py-2 text-sm border-transparent text-white bg-blue-600 md:text-base lg:text-lg hover:bg-blue-800">
    Create Email
  </button>
</form>

TODO

So much! Maybe?

• Radio buttons, selects, and other fields
• Customize HTML of wrapper methods
• Customize error and label HTML placement with the inputs
• Form hints, placeholders, and more I18n customizations
• Document other new form builder methods like error_tag and field

Installation

Add this line to your application's Gemfile:

gem "form_buildable"

And then execute:

$ bundle

Or install it yourself as:

$ gem install form_buildable

Contributing

Contribution directions go here.

License

The gem is available as open source under the terms of the MIT License.