Support for simple form with bulma css, copy and paste on config/initializers/simple_form_bulma.rb

simple_form_bulma.rb

# frozen_string_literal: true


# Use this setup block to configure all options available in SimpleForm.
SimpleForm.setup do |config|
  # Default class for buttons
  config.button_class = "button"

  # Define the default class of the input wrapper of the boolean input.
  config.boolean_label_class = "checkbox"

  # How the label text should be generated altogether with the required text.
  config.label_text = lambda { |label, required, explicit_label| "#{label} #{required}" }

  # Define the way to render check boxes / radio buttons with labels.
  config.boolean_style = :inline

  # You can wrap each item in a collection of radio/check boxes with a tag
  config.item_wrapper_tag = :div

  # Defines if the default input wrapper class should be included in radio
  # collection wrappers.
  config.include_default_input_wrapper_class = false

  # CSS class to add for error notification helper.
  config.error_notification_class = "notification is-danger"

  # Method used to tidy up errors. Specify any Rails Array method.
  # :first lists the first message for each field.
  # :to_sentence to list all errors for each field.
  config.error_method = :to_sentence

  # add validation classes to `input_field`
  config.input_field_error_class = "is-danger"
  config.input_field_valid_class = "is-success"


  # vertical forms
  #
  # bulma vertical default_wrapper
  config.wrappers :vertical_form, tag: "div", class: "field" do |b|
    b.use :html5
    b.use :placeholder
    b.optional :maxlength
    b.optional :minlength
    b.optional :pattern
    b.optional :min_max
    b.optional :readonly
    b.use :label, class: "label"
    b.use :input, class: "input", wrap_with: { tag: "div", class: "control" }, error_class: "is-danger", valid_class: "is-success"
    b.use :full_error, wrap_with: { tag: "div", class: "help is-danger" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  end

  # bulma vertical select_form
  config.wrappers :select_form, tag: "div", class: "control" do |b|
    b.use :html5
    b.use :placeholder
    b.optional :pattern
    b.optional :readonly
    b.use :input, wrap_with: { tag: "div", class: "select" }
    b.use :full_error, wrap_with: { tag: "div", class: "help is-danger" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  end

  # bulma extension vertical input for boolean
  config.wrappers :vertical_boolean, tag: "div", class: "field" do |b|
    b.use :html5
    b.optional :readonly
    b.use :input, class: "is-checkradio is-info"
    b.use :label
    #b.wrapper :form_check_wrapper, tag: "div", class: "control" do |bb|
      #bb.use :input, wrap_with: { tag: "label", class: "checkbox" }
      #bb.use :label, class: "checkbox"
      #bb.use :full_error, wrap_with: { tag: "div", class: "help is-danger" }
      #bb.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  end

  ## vertical input for radio buttons and check boxes
  #config.wrappers :vertical_collection, item_wrapper_class: "form-check", tag: "fieldset", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.wrapper :legend_tag, tag: "legend", class: "col-form-label pt-0" do |ba|
      #ba.use :label_text
    #end
    #b.use :input, class: "form-check-input", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end

  ## vertical input for inline radio buttons and check boxes
  #config.wrappers :vertical_collection_inline, item_wrapper_class: "form-check form-check-inline", tag: "fieldset", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.wrapper :legend_tag, tag: "legend", class: "col-form-label pt-0" do |ba|
      #ba.use :label_text
    #end
    #b.use :input, class: "form-check-input", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end

  ## bulma vertical file input
  config.wrappers :vertical_file, tag: "div", class: "file" do |b|
    b.use :html5
    b.optional :readonly
    b.use :input, class: "file-input", wrap_with: { tag: "label", class: "file-label"}
    b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
    b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  end

  ## bulma vertical multi select
  config.wrappers :vertical_multi_select, tag: "div", class: "field" do |b|
    b.use :html5
    b.optional :readonly
    b.use :label, class: "label"
    b.wrapper tag: "div", class: "control" do |ba|
      ba.use :input, class: "input", error_class: "is-danger", valid_class: "is-success"
    end
    b.use :full_error, wrap_with: { tag: "div", class: "is-danger" }
    b.use :hint, wrap_with: { tag: "small", class: "help" }
  end

  ## vertical range input
  #config.wrappers :vertical_range, tag: "div", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.use :placeholder
    #b.optional :readonly
    #b.optional :step
    #b.use :label
    #b.use :input, class: "form-control-range", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end


  ## horizontal forms
  ##
  ## horizontal default_wrapper
  #config.wrappers :horizontal_form, tag: "div", class: "form-group row", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.use :placeholder
    #b.optional :maxlength
    #b.optional :minlength
    #b.optional :pattern
    #b.optional :min_max
    #b.optional :readonly
    #b.use :label, class: "col-sm-3 col-form-label"
    #b.wrapper :grid_wrapper, tag: "div", class: "col-sm-9" do |ba|
      #ba.use :input, class: "form-control", error_class: "is-invalid", valid_class: "is-valid"
      #ba.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback" }
      #ba.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  #end

  ## horizontal input for boolean
  #config.wrappers :horizontal_boolean, tag: "div", class: "form-group row", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.wrapper tag: "label", class: "col-sm-3" do |ba|
      #ba.use :label_text
    #end
    #b.wrapper :grid_wrapper, tag: "div", class: "col-sm-9" do |wr|
      #wr.wrapper :form_check_wrapper, tag: "div", class: "form-check" do |bb|
        #bb.use :input, class: "form-check-input", error_class: "is-invalid", valid_class: "is-valid"
        #bb.use :label, class: "form-check-label"
        #bb.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
        #bb.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
      #end
    #end
  #end

  ## horizontal input for radio buttons and check boxes
  #config.wrappers :horizontal_collection, item_wrapper_class: "form-check", tag: "div", class: "form-group row", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.use :label, class: "col-sm-3 form-control-label"
    #b.wrapper :grid_wrapper, tag: "div", class: "col-sm-9" do |ba|
      #ba.use :input, class: "form-check-input", error_class: "is-invalid", valid_class: "is-valid"
      #ba.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
      #ba.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  #end

  ## horizontal input for inline radio buttons and check boxes
  #config.wrappers :horizontal_collection_inline, item_wrapper_class: "form-check form-check-inline", tag: "div", class: "form-group row", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.use :label, class: "col-sm-3 form-control-label"
    #b.wrapper :grid_wrapper, tag: "div", class: "col-sm-9" do |ba|
      #ba.use :input, class: "form-check-input", error_class: "is-invalid", valid_class: "is-valid"
      #ba.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
      #ba.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  #end

  ## horizontal file input
  #config.wrappers :horizontal_file, tag: "div", class: "form-group row", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.use :placeholder
    #b.optional :maxlength
    #b.optional :minlength
    #b.optional :readonly
    #b.use :label, class: "col-sm-3 form-control-label"
    #b.wrapper :grid_wrapper, tag: "div", class: "col-sm-9" do |ba|
      #ba.use :input, error_class: "is-invalid", valid_class: "is-valid"
      #ba.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
      #ba.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  #end

  ## horizontal multi select
  #config.wrappers :horizontal_multi_select, tag: "div", class: "form-group row", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.use :label, class: "col-sm-3 control-label"
    #b.wrapper :grid_wrapper, tag: "div", class: "col-sm-9" do |ba|
      #ba.wrapper tag: "div", class: "d-flex flex-row justify-content-between align-items-center" do |bb|
        #bb.use :input, class: "form-control mx-1", error_class: "is-invalid", valid_class: "is-valid"
      #end
      #ba.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
      #ba.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  #end

  ## horizontal range input
  #config.wrappers :horizontal_range, tag: "div", class: "form-group row", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.use :placeholder
    #b.optional :readonly
    #b.optional :step
    #b.use :label, class: "col-sm-3 form-control-label"
    #b.wrapper :grid_wrapper, tag: "div", class: "col-sm-9" do |ba|
      #ba.use :input, class: "form-control-range", error_class: "is-invalid", valid_class: "is-valid"
      #ba.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
      #ba.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  #end


  ## inline forms
  ##
  ## inline default_wrapper
  #config.wrappers :inline_form, tag: "span", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.use :placeholder
    #b.optional :maxlength
    #b.optional :minlength
    #b.optional :pattern
    #b.optional :min_max
    #b.optional :readonly
    #b.use :label, class: "sr-only"

    #b.use :input, class: "form-control", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :error, wrap_with: { tag: "div", class: "invalid-feedback" }
    #b.optional :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end

  ## inline input for boolean
  #config.wrappers :inline_boolean, tag: "span", class: "form-check flex-wrap justify-content-start mr-sm-2", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.use :input, class: "form-check-input", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :label, class: "form-check-label"
    #b.use :error, wrap_with: { tag: "div", class: "invalid-feedback" }
    #b.optional :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end


  ## bootstrap custom forms
  ##
  ## custom input for boolean
  #config.wrappers :custom_boolean, tag: "fieldset", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.wrapper :form_check_wrapper, tag: "div", class: "custom-control custom-checkbox" do |bb|
      #bb.use :input, class: "custom-control-input", error_class: "is-invalid", valid_class: "is-valid"
      #bb.use :label, class: "custom-control-label"
      #bb.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback" }
      #bb.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  #end

  ## custom input for boolean
  #config.wrappers :custom_boolean_switch, tag: "fieldset", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.wrapper :form_check_wrapper, tag: "div", class: "custom-control custom-checkbox-switch" do |bb|
      #bb.use :input, class: "custom-control-input", error_class: "is-invalid", valid_class: "is-valid"
      #bb.use :label, class: "custom-control-label"
      #bb.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback" }
      #bb.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
    #end
  #end

  ## custom input for radio buttons and check boxes
  #config.wrappers :custom_collection, item_wrapper_class: "custom-control", tag: "fieldset", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.wrapper :legend_tag, tag: "legend", class: "col-form-label pt-0" do |ba|
      #ba.use :label_text
    #end
    #b.use :input, class: "custom-control-input", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end

  ## custom input for inline radio buttons and check boxes
  #config.wrappers :custom_collection_inline, item_wrapper_class: "custom-control custom-control-inline", tag: "fieldset", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.wrapper :legend_tag, tag: "legend", class: "col-form-label pt-0" do |ba|
      #ba.use :label_text
    #end
    #b.use :input, class: "custom-control-input", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end

  ## custom file input
  #config.wrappers :custom_file, tag: "div", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.use :placeholder
    #b.optional :maxlength
    #b.optional :minlength
    #b.optional :readonly
    #b.use :label, class: "form-control-label"
    #b.wrapper :custom_file_wrapper, tag: "div", class: "custom-file" do |ba|
      #ba.use :input, class: "custom-file-input", error_class: "is-invalid", valid_class: "is-valid"
      #ba.use :label, class: "custom-file-label"
      #ba.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback" }
    #end
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end

  ## custom multi select
  #config.wrappers :custom_multi_select, tag: "div", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.use :label, class: "form-control-label"
    #b.wrapper tag: "div", class: "d-flex flex-row justify-content-between align-items-center" do |ba|
      #ba.use :input, class: "custom-select mx-1", error_class: "is-invalid", valid_class: "is-valid"
    #end
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end

  ## custom range input
  #config.wrappers :custom_range, tag: "div", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.use :placeholder
    #b.optional :readonly
    #b.optional :step
    #b.use :label, class: "form-control-label"
    #b.use :input, class: "custom-range", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end


  # Input Group - custom component
  # see example app and config at https://github.com/rafaelfranca/simple_form-bootstrap
  # config.wrappers :input_group, tag: "div", class: "form-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
  #   b.use :html5
  #   b.use :placeholder
  #   b.optional :maxlength
  #   b.optional :minlength
  #   b.optional :pattern
  #   b.optional :min_max
  #   b.optional :readonly
  #   b.use :label, class: "form-control-label"
  #   b.wrapper :input_group_tag, tag: "div", class: "input-group" do |ba|
  #     ba.optional :prepend
  #     ba.use :input, class: "form-control", error_class: "is-invalid", valid_class: "is-valid"
  #     ba.optional :append
  #   end
  #   b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback d-block" }
  #   b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  # end


  ## Floating Labels form
  ##
  ## floating labels default_wrapper
  #config.wrappers :floating_labels_form, tag: "div", class: "form-label-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.use :placeholder
    #b.optional :maxlength
    #b.optional :minlength
    #b.optional :pattern
    #b.optional :min_max
    #b.optional :readonly
    #b.use :input, class: "form-control", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :label, class: "form-control-label"
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end

  ## custom multi select
  #config.wrappers :floating_labels_select, tag: "div", class: "form-label-group", error_class: "form-group-invalid", valid_class: "form-group-valid" do |b|
    #b.use :html5
    #b.optional :readonly
    #b.use :input, class: "custom-select custom-select-lg", error_class: "is-invalid", valid_class: "is-valid"
    #b.use :label, class: "form-control-label"
    #b.use :full_error, wrap_with: { tag: "div", class: "invalid-feedback" }
    #b.use :hint, wrap_with: { tag: "small", class: "form-text text-muted" }
  #end


  # The default wrapper to be used by the FormBuilder.
  config.default_wrapper = :vertical_form

  # Custom wrappers for input types. This should be a hash containing an input
  # type as key and the wrapper that will be used for all inputs with specified type.
  config.wrapper_mappings = {
    boolean:       :vertical_boolean,
    check_boxes:   :vertical_collection,
    date:          :vertical_multi_select,
    datetime:      :vertical_multi_select,
    file:          :vertical_file,
    radio_buttons: :vertical_collection,
    range:         :vertical_range,
    time:          :vertical_multi_select
  }

  # enable custom form wrappers
  # config.wrapper_mappings = {
  #   boolean:       :custom_boolean,
  #   check_boxes:   :custom_collection,
  #   date:          :custom_multi_select,
  #   datetime:      :custom_multi_select,
  #   file:          :custom_file,
  #   radio_buttons: :custom_collection,
  #   range:         :custom_range,
  #   time:          :custom_multi_select
  # }
end

Thank you for this code, it works well, I just had a problem with the select field, please let me know if you have a more recent version of this snippet that fix this problem.

To fix my problem with the select field I just add the select on select: :select_form and use a little bit of CSS like bellow:

div.select {
  display: block;
}

label.select {
  height: 24px !important;
}

div.control::after,
label::after {
  content: none !important;
}

select.select {
  width: 100%;
}

If you want to know what causes this problem please contact me.

@brunofrank thanks for share your solution!
Yes I want to know what causes the problem? Please

I forget the reason 🤦‍♂️

hahaha, no worries, Do you still use Bulma?

Yes, I am using it on a side project.

Great! Have a good day!

Thanks fo sharing this
File upload button (https://bulma.io/documentation/form/file) is not rendered correctly with this setup
To fix it I've added custom component and changed vertical_file wrapper

 ## bulma vertical file input
 config.wrappers :vertical_file, tag: 'div', class: 'field' do |b|
    b.use :html5
    b.optional :readonly
    b.wrapper tag: 'label', class: 'file-label' do |ba|
      ba.use :input, class: 'file-input'
      ba.use :file_button
    end
    b.use :full_error, wrap_with: { tag: 'div', class: 'invalid-feedback d-block' }
    b.use :hint, wrap_with: { tag: 'small', class: 'form-text text-muted' }
end

# lib/components/file_button_component.rb

module FileButtonComponent
  def file_button(_wrapper_options = nil)
    @file_button ||= begin
      icon = content_tag(:i, nil, class: 'fas fa-upload')

      contents = [
        content_tag(:span, icon, class: 'file-icon'),
        content_tag(:span, 'Choose a file', class: 'file-label')
      ]

      content_tag(:span, safe_join(contents), class: 'file-cta')
    end
  end
end

SimpleForm.include_component(FileButtonComponent)

# in config/initializers/simple_form.rb uncomment
Dir[Rails.root.join('lib/components/**/*.rb')].sort.each { |f| require f }

@artpla

Thanks fo sharing this
File upload button (https://bulma.io/documentation/form/file) is not rendered correctly with this setup
To fix it I've added custom component and changed vertical_file wrapper

 ## bulma vertical file input
 config.wrappers :vertical_file, tag: 'div', class: 'field' do |b|
    b.use :html5
    b.optional :readonly
    b.wrapper tag: 'label', class: 'file-label' do |ba|
      ba.use :input, class: 'file-input'
      ba.use :file_button
    end
    b.use :full_error, wrap_with: { tag: 'div', class: 'invalid-feedback d-block' }
    b.use :hint, wrap_with: { tag: 'small', class: 'form-text text-muted' }
end

# lib/components/file_button_component.rb

module FileButtonComponent
  def file_button(_wrapper_options = nil)
    @file_button ||= begin
      icon = content_tag(:i, nil, class: 'fas fa-upload')

      contents = [
        content_tag(:span, icon, class: 'file-icon'),
        content_tag(:span, 'Choose a file', class: 'file-label')
      ]

      content_tag(:span, safe_join(contents), class: 'file-cta')
    end
  end
end

SimpleForm.include_component(FileButtonComponent)

# in config/initializers/simple_form.rb uncomment
Dir[Rails.root.join('lib/components/**/*.rb')].sort.each { |f| require f }

Thank you for your contribution. I'll be using this gist againg let me check it out then I'll add them to the gist.

Thank you for this. I've added a link to it from the simple_form docs: https://github.com/heartcombo/simple_form/wiki/Bulma-integration

Thank you for this. I've added a link to it from the simple_form docs: https://github.com/heartcombo/simple_form/wiki/Bulma-integration

@LimeBlast Thank you for adding it, I hope this template helps more people 👍

@brunofrank thanks for your additional select css. This helped me out a lot. It's a shame that it's needed - it seems the defaults of simple_form. (which seem to be bootstrap focused) are just getting in the way, without an easy way of avoiding them.

Rather than use the extra CSS for the select issue I added this line that removes the duplicate classes from the various elements:

config.generate_additional_classes_for = [] # defaults to [:wrapper, :label, :input]