3.1.0.rc2

enhancements

• Add mapping to uuid columns.
• Add custom namespaces for custom inputs feature. @vala
• Add :unless_blank option to the wrapper API. @IanVaughan
• Add support to html markup in the I18n options. @laurocaetano
• Add the full_error component. @laurocaetano
• Add support to scope to be used on associations. @laurocaetano
• Execute the association condition in the object context. @laurocaetano
• Check if the given association responds to order before calling it. @laurocaetano
• Add Bootstrap 3 initializer template.
• For radio or checkbox collection always use :item_wrapper_tag to wrap the content and add label when using boolean_style with :nested @kassio and @erichkist
• input_field uses the same wrapper as input but only with attribute components. @nashby
• Add wrapper mapping per form basis @rcillo and @bernardoamc
• Add for attribute to label when collections are rendered as radio or checkbox @erichkist, @ulissesalmeida and @fabioyamate
• Add include_default_input_wrapper_class config @luizcosta
• Map datetime, date and time input types to their respective HTML5 input tags
  when the :html5 is set to true @volmer
• Add boolean_label_class config.
• Add :html option to include additional attributes on custom wrappers @remofritzsche and @ulissesalmeida
• Make possible to use the Wrappers API to define attributes for the components.
  See #997 for more information.
• Put a whitespace before the inline_label options of boolean input if it is present.
• Add support to configure the label_text proc at the wrapper level. @NOX73
• label_text proc now receive three arguments (label, request, and if the label was explicit). @timscott
• Add I18n support to :include_blank and :prompt when :translate is used as value. @haines
• Add support to define custom error messages for the attributes.
• Add support to change the I18n scope to be used in Simple Form. @nielsbuus

bug fix

• Collection input that uses automatic collection translation properly sets checked values.
  Closes #971 @nashby
• Collection input generates required attribute if it has prompt option. @nashby
• Grouped collection uses the first non-empty object to detect label and value methods.

deprecation

• Methods on custom inputs now accept a required argument with the wrapper options.
  See #997 for more information.

Simple Form 3.0.0

This version add support to Rails 4 and drops entirely support to Rails 3 and Ruby 1.8. If you want support to these version use Simple Form 2.1

enhancements

• New input_class global config option to set a class to be generated in all inputs.
• Collection tags accept html attributes as the last element of collection @nashby
• Change default :value_method of collection tags from :last to :second @nashby
• Support Proc object in :conditions option of associations @bradly
• input_field supports html5 component @nashby
• Make field_error_proc configurable @dfens
• Support to Rails 4.
• Removed deprecated methods.
• SimpleForm no longer sets the size attribute automatically and the default_input_size setting
  is now deprecated.
• Support to aria-required attribute to required fields @ckundo

bug fix

• Make DateTimeInput#label_target method to work with string values in I18n.t('date.order') (default
  behaviour in Rails 4)
  Closes #846 @mjankowski
• Add "checkbox" class to the label of boolean input when there is no :label
  in generate_additional_classes_for config option @nashby
• Support models with digits in their names @webgago
• Remove deprecation warnings related to Relation#all from Rails 4.
• Form builder can be used outside the context of a controller @jasonwebster
• Skip pattern attribute when using validates_format_of with :without option @glebm