Rails initializer for SimpleForm version 3.0.2

simple_form.rb

# /config/initializers/

inputs = %w[
  CollectionSelectInput
  DateTimeInput
  FileInput
  GroupedCollectionSelectInput
  NumericInput
  PasswordInput
  RangeInput
  StringInput
  TextInput
]

inputs.each do |input_type|
  superclass = "SimpleForm::Inputs::#{input_type}".constantize

  new_class = Class.new(superclass) do
    def input_html_classes
      super.push('form-control')
    end
  end

  Object.const_set(input_type, new_class)
end

# Use this setup block to configure all options available in SimpleForm.
SimpleForm.setup do |config|
  config.boolean_style = :nested
  config.browser_validations = false

  config.wrappers :bs3, tag: 'div', class: 'form-group', error_class: 'has-error',
      defaults: { input_html: { class: 'default-class' } } do |b|

    b.use :html5
    b.use :min_max
    b.use :maxlength
    b.use :placeholder

    b.optional :pattern
    b.optional :readonly

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

 config.wrappers :bs3_horizontal, tag: 'div', class: 'form-group', error_class: 'has-error',
      defaults: { input_html: { class: 'default-class'}, wrapper_html: { class: "col-lg-10 col-md-10"} } do |b|

    b.use :html5
    b.use :min_max
    b.use :maxlength
    b.use :placeholder

    b.optional :pattern
    b.optional :readonly

    b.use :label
    b.wrapper :right_column, tag: :div do |component|
      component.use :input
    end
    b.use :hint,  wrap_with: { tag: 'span', class: 'help-block' }
    b.use :error, wrap_with: { tag: 'span', class: 'help-block has-error' }
  end

  config.wrappers :group, tag: 'div', class: "form-group", error_class: 'has-error',
      defaults: { input_html: { class: 'default-class'} }  do |b|

    b.use :html5
    b.use :min_max
    b.use :maxlength
    b.use :placeholder

    b.optional :pattern
    b.optional :readonly

    b.use :label
    b.wrapper :right_column, tag: :div do |component|
      component.use :input, wrap_with: { class: "input-group" }
      component.use :hint,  wrap_with: { tag: 'span', class: 'help-block' }
      component.use :error, wrap_with: { tag: 'span', class: 'help-block has-error' }
    end
  end

  config.default_wrapper = :bs3
end