initializer/simple_form.rb

# Use this setup block to configure all options available in SimpleForm.
SimpleForm.setup do |config|
  # Components used by the form builder to generate a complete input. You can remove
  # any of them, change the order, or even add your own components to the stack.
  # config.components = [ :placeholder, :label_input, :hint, :error ]
  # config.components = [ :placeholder, :holdsport_label_input, :hint, :error ]

  # Default tag used on hints.
  # config.hint_tag = :span

  # CSS class to add to all hint tags.
  # config.hint_class = :hint

  # CSS class used on errors.
  # config.error_class = :error

  # Default tag used on errors.
  # config.error_tag = :span

  # Method used to tidy up errors.
  # config.error_method = :first

  # Default tag used for error notification helper.
  config.error_notification_tag = :div

  # CSS class to add for error notification helper.
  # config.error_notification_class = :error_notification

  # ID to add for error notification helper.
  # config.error_notification_id = nil

  # You can wrap all inputs in a pre-defined tag.
  # config.wrapper_tag = nil

  # CSS class to add to all wrapper tags.
  # config.wrapper_class = :input

  # CSS class to add to the wrapper if the field has errors.
  # config.wrapper_error_class = :field_with_errors

  # You can wrap a collection of radio/check boxes in a pre-defined tag, defaulting to none.
  # config.collection_wrapper_tag = nil

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

  # Series of attempts to detect a default label method for collection.
  # config.collection_label_methods = [ :to_label, :name, :title, :to_s ]

  # Series of attempts to detect a default value method for collection.
  # config.collection_value_methods = [ :id, :to_s ]

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

  # You can define the class to use on all forms. Default is simple_form.
  # config.form_class = :simple_form

  # Whether attributes are required by default (or not). Default is true.
  # config.required_by_default = true

  # Tell browsers whether to use default HTML5 validations (novalidate option).
  # Default is enabled.
  config.browser_validations = false

  # Determines whether HTML5 types (:email, :url, :search, :tel) and attributes
  # (e.g. required) are used or not. True by default.
  # Having this on in non-HTML5 compliant sites can cause odd behavior in
  # HTML5-aware browsers such as Chrome.
  # config.html5 = true

  # Custom mappings for input types. This should be a hash containing a regexp
  # to match as key, and the input type that will be used when the field name
  # matches the regexp as value.
  # config.input_mappings = { /count/ => :integer }

  # Collection of methods to detect if a file type was given.
  # config.file_methods = [ :mounted_as, :file?, :public_filename ]

  # Default priority for time_zone inputs.
  # config.time_zone_priority = nil

  # Default priority for country inputs.
  # config.country_priority = nil

  # Default size for text inputs.
  # config.default_input_size = 50

  # When false, do not use translations for labels, hints or placeholders.
  # config.translate = true

  config.wrappers :default, :class => :input, :hint_class => :field_with_hint, :error_class => :field_with_errors do |b|
    ## Extensions enabled by default
    # Any of these extensions can be disabled for a
    # given input by passing: `f.input EXTENSION_NAME => false`.
    # You can make any of these extensions optional by
    # renaming `b.use` to `b.optional`.

    # Determines whether to use HTML5 (:email, :url, ...)
    # and required attributes
    b.use :html5

    # Calculates placeholders automatically from I18n
    # You can also pass a string as f.input :placeholder => "Placeholder"
    b.use :placeholder

    ## Optional extensions
    # They are disabled unless you pass `f.input EXTENSION_NAME => :lookup`
    # to the input. If so, they will retrieve the values from the model
    # if any exists. If you want to enable the lookup for any of those
    # extensions by default, you can change `b.optional` to `b.use`.

    # Calculates maxlength from length validations for string inputs
    b.optional :maxlength

    # Calculates pattern from format validations for string inputs
    b.optional :pattern

    # Calculates min and max from length validations for numeric inputs
    b.optional :min_max

    # Calculates readonly automatically from readonly attributes
    b.optional :readonly

    ## Inputs
    b.use :label_input
    b.use :hint,  :wrap_with => { :tag => :span, :class => :hint }
    b.use :error, :wrap_with => { :tag => :span, :class => :error }
  end

  config.wrappers :jquery_mobile, :tag => false do |b|
    b.use :html5
    b.use :placeholder
    b.use :label
    b.use :error, :wrap_with => { :tag => 'span', :class => 'help-inline' }
    b.use :hint,  :wrap_with => { :tag => 'span', :class => 'help-block' }
    b.use :input
  end

  #########################################################
  ####################### Bootstrap #######################
  #########################################################

  ######### Config #########
  config.button_class = 'btn btn-default'
  #config.boolean_label_class = nil # This option doesn't exist in simple_form 2.1

  # Define the way to render check boxes / radio buttons with labels.
  # Defaults to :nested for bootstrap config.
  #   :inline => input + label
  #   :nested => label > input
  config.boolean_style = :nested

  # You can define the class to use on all labels. Default is nil.
  config.label_class = 'control-label'

  ######### Wrappers #########
  config.wrappers :vertical_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder
    b.use :label, class: 'control-label'

    b.wrapper tag: 'div' do |ba|
      ba.use :input, class: 'form-control'
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :vertical_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder
    b.use :label, class: 'control-label'

    b.wrapper tag: 'div' do |ba|
      ba.use :input
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :vertical_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder

    b.wrapper tag: 'div', class: 'checkbox' do |ba|
      ba.use :label_input
    end

    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
  end

  config.wrappers :vertical_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder
    b.use :label_input
    b.use :error, wrap_with: { tag: 'span', class: 'help-block' }
    b.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
  end

  config.wrappers :horizontal_form, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder
    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input, class: 'form-control'
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_file_input, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder
    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_boolean, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder

    b.wrapper tag: 'div', class: 'col-sm-offset-3 col-sm-9' do |wr|
      wr.wrapper tag: 'div', class: 'checkbox' do |ba|
        ba.use :label_input, class: 'col-sm-9'
      end

      wr.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      wr.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end

  config.wrappers :horizontal_radio_and_checkboxes, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder

    b.use :label, class: 'col-sm-3 control-label'

    b.wrapper tag: 'div', class: 'col-sm-9' do |ba|
      ba.use :input
      ba.use :error, wrap_with: { tag: 'span', class: 'help-block' }
      ba.use :hint,  wrap_with: { tag: 'p', class: 'help-block' }
    end
  end


  ######### Additional bootstrap stuff found somewhere #########

  config.wrappers :prepend, :tag => 'div', :class => "control-group", :error_class => 'error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder
    b.use :label
    b.wrapper :tag => 'div', :class => 'controls' do |input|
      input.wrapper :tag => 'div', :class => 'input-prepend' do |prepend|
        prepend.use :input
      end
      input.use :hint,  :wrap_with => { :tag => 'span', :class => 'help-block' }
      input.use :error, :wrap_with => { :tag => 'span', :class => 'help-inline' }
    end
  end

  config.wrappers :append, :tag => 'div', :class => "control-group", :error_class => 'error' do |b|
    b.use :judge
    b.use :html5
    b.use :placeholder
    b.use :label
    b.wrapper :tag => 'div', :class => 'controls' do |input|
      input.wrapper :tag => 'div', :class => 'input-append' do |append|
        append.use :input
      end
      input.use :hint,  :wrap_with => { :tag => 'span', :class => 'help-block' }
      input.use :error, :wrap_with => { :tag => 'span', :class => 'help-inline' }
    end
  end
end