Bootstrap 3 simple form initializer

simple_form_bootstrap3.rb

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.wrappers :bootstrap3, 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 :prepend, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.wrapper tag: 'div', class: 'controls' do |input|
      input.wrapper tag: 'div', class: 'input-group' do |prepend|
    prepend.use :label , class: 'input-group-addon' ###Please note setting class here fro the label does not currently work (let me know if you know a workaround as this is the final hurdle)
        prepend.use :input
      end
      input.use :hint,  wrap_with: { tag: 'span', class: 'help-block' }
      input.use :error, wrap_with: { tag: 'span', class: 'help-block has-error' }
    end
  end
 
  config.wrappers :append, tag: 'div', class: 'form-group', error_class: 'has-error' do |b|
    b.use :html5
    b.use :placeholder
    b.wrapper tag: 'div', class: 'controls' do |input|
      input.wrapper tag: 'div', class: 'input-group' do |prepend|
        prepend.use :input
    prepend.use :label , class: 'input-group-addon' ###Please note setting class here fro the label does not currently work (let me know if you know a workaround as this is the final hurdle)
      end
      input.use :hint,  wrap_with: { tag: 'span', class: 'help-block' }
      input.use :error, wrap_with: { tag: 'span', class: 'help-block has-error' }
    end
  end

  config.wrappers :checkbox, tag: :div, class: "checkbox", error_class: "has-error" do |b|

    # Form extensions
    b.use :html5

    # Form components
    b.wrapper tag: :label do |ba|
      ba.use :input
      ba.use :label_text
    end

    b.use :hint,  wrap_with: { tag: :p, class: "help-block" }
    b.use :error, wrap_with: { tag: :span, class: "help-block text-danger" }
  end
 
  # Wrappers for forms and inputs using the Twitter Bootstrap toolkit.
  # Check the Bootstrap docs (http://getbootstrap.com/)
  # to learn about the different styles for forms and inputs,
  # buttons and other elements.
  config.default_wrapper = :bootstrap3
end

For what it's worth, the initializer raised errors for me with ruby 1.9.2.

Monkey patching the original classes worked for me:

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

  superclass.class_eval do
    def input_html_classes_with_form_control
      input_html_classes_without_form_control.push('form-control')
    end
    alias_method_chain :input_html_classes, :form_control
  end
end

I think better use: config.input_class = 'form-control' instead of:
...

Radio and checkbox buttons!!! 😱
Don't use config.input_class = 'form-control' :)

Great piece of code, really helpful. Could you add a license info so that we know how can we use it?

Thank you very much, works well

Thanks. This is really awesome.

@cmartin81 for some reason, the label is to the right of the input form? Is that what you get too?

@dickyblue, I had same problem and couldn't get

b.use :label, class: 'col-sm-5 control-label'

to style correctly in boostrap3_horizontal.

A different gist ended up helping me more, notice that defaults for label_html and right_column_html add the classes and are declared in the form partial simple_form_for not the initializer... surely fixes for these issues are simple to a seasoned ruby developer but I'm completely new on this so I found this gist more workable. https://gist.github.com/adamico/6510093

@dickyblue i also had that problem. i updated @cmartin81's version slightly and added the error handling in the correct spot:

  config.wrappers :bootstrap3_horizontal, tag: 'div', class: 'form-group', error_class: 'has-error',
                  defaults: { input_html: { class: 'form-group 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, wrap_with: { tag: 'div', class: 'col-md-2' }

    b.wrapper tag: 'div', class: 'col-md-10' do |input_block|
      input_block.use :input
      input_block.use :hint,  wrap_with: { tag: 'span', class: 'help-block' }
      input_block.use :error, wrap_with: { tag: 'span', class: 'help-block has-error' }
    end
  end

http://blog.plataformatec.com.br/2014/04/bootstrap-3-support-for-simple-form/ - Simple Form 3.1.0.rc1 with support to Bootstrap 3.

This will unfortunately break Active Admin. However, the following approach works fine for me:

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

inputs.each do |input_type|
  "SimpleForm::Inputs::#{input_type}".constantize.class_eval do
    alias_method :__input_html_classes, :input_html_classes
    define_method(:input_html_classes) do
      __input_html_classes.push('form-control')
    end
  end
end

Thanks, this trick helped me. But I use

config.wrapper_mappings = { boolean: :checkbox }
config.wrappers :checkbox, tag: :div, class: 'checkbox', error_class: 'has-error' do |b|
  b.use :html5
  b.use :label_input

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

When I use

b.wrapper tag: :label do |ba|
  ba.use :input
  ba.use :label_text
end

the inputs adds me a label automatically and just prepends the plain text.

Thanks you very much