Formtastic jQuery UI date and time picker input

datetime_ui_input.rb

# http://jqueryui.com/demos/datepicker/
# http://fgelinas.com/code/timepicker/

class DatetimeUiInput
  include Formtastic::Inputs::Base
  
  DATE_FORMAT = "%Y-%m-%d"
  TIME_FORMAT = "%H:%M"
  
  def to_html
    input_wrapping do
      fragments_wrapping do
        hidden_fragments <<
        fragments_label <<
        template.content_tag(:ol,
          fragments.map do |fragment|
            fragment_wrapping do
              fragment_label_html(fragment) <<
              fragment_input_html(fragment)
            end
          end.join.html_safe, # TODO is this safe?
          { :class => 'fragments-group' } # TODO refactor to fragments_group_wrapping
        )
      end
    end
  end
  
  def fragments
    [:date, :time]
  end
  
  def fragment_wrapping(&block)
    template.content_tag(:li, template.capture(&block), fragment_wrapping_html_options)
  end
  
  def fragment_wrapping_html_options
    { :class => 'fragment' }
  end
  
  def fragment_label(fragment)
    labels_from_options = options[:labels] || {}
    if labels_from_options.key?(fragment)
      labels_from_options[fragment]
    else
      ::I18n.t(fragment.to_s, :default => fragment.to_s.humanize, :scope => [:datetime, :prompts])
    end
  end
  
  def fragment_id(fragment)
    "#{input_html_options[:id]}_#{position(fragment)}s"
  end
  
  def fragment_name(fragment)
    "#{method}(#{position(fragment)}s)"
  end
  
  def fragment_label_html(fragment)
    text = fragment_label(fragment)
    text.blank? ? "".html_safe : template.content_tag(:label, text, :for => fragment_id(fragment))
  end
  
  def value(fragment)
    object.send(method).strftime(class_eval("#{fragment.to_s.upcase}_FORMAT"))
  end
  
  def fragment_input_html(fragment)
    opts = input_html_options.merge(:id => fragment_id(fragment), :value => value(fragment), :class => "#{fragment}picker", :readonly => "readonly")
    template.send(:text_field, object_name, fragment_name(fragment), opts)
  end
  
  def positions
    { :date => 1, :time => 2 }
  end
  
  def position(fragment)
    positions[fragment]
  end
  
  def i18n_date_fragments
    order = ::I18n.t(:order, :scope => [:date])
    order = nil unless order.is_a?(Array)
    order
  end
  
  def fragments_wrapping(&block)
    template.content_tag(:fieldset,
      template.capture(&block).html_safe,
      fragments_wrapping_html_options
    )
  end
  
  def fragments_wrapping_html_options
    { :class => "fragments" }
  end
  
  def fragments_label
    if render_label?
      template.content_tag(:legend,
        builder.label(method, label_text, :for => "#{input_html_options[:id]}_1s"),
        :class => "label"
      )
    else
      "".html_safe
    end
  end
  
  def fragments_inner_wrapping(&block)
    template.content_tag(:ol,
      template.capture(&block)
    )
  end
  
  def hidden_fragments
    "".html_safe
  end
end

Do I need to grab anything from here: http://fgelinas.com/code/timepicker/

@SarkisV maybe you did not have an attribute for the field you are trying to show DatetimeUiInput or the value of this field is nil (NULL)
another solution will be to replace value method with something like this (untested!)

  def value(fragment)
    val = object.send(method)
    return "" if val.blank?
    val.strftime(class_eval("#{fragment.to_s.upcase}_FORMAT"))
  end

How is multiparameter assignement is done with this code?

@aganov thanks for this! It's working great. @budu I'm still trying to figure out how to use strong_paramaters with this... I'm getting an ActiveRecord::MultiparameterAssignmentErrors exception when I try to post the form. Will post back when I figure it out.