active record extensions

extensions.rb

  class ActiveRecord::Base   
        def self.has_statuses(*status_names)
          validates :status, 
                    presence: true, 
                    inclusion: { in: status_names.to_s} 
          
          status_names.each do |status_name|
            scope "all_#{status_name}", where(status: status_name)
          end

          status_names.each do |status_name|
            define_method "#{status_name}?" do
              status == status_name.to_s
            end           
          end
        end 
    end     

generated.html

    <li class="select optional error" id="order_status_input">
      <label for="order_status">Status</label>
      <select data-validate="true" id="order_status" name="order[status]">
        <option value=""></option>
        <option value="created">Created</option>
        <option value="in_progress" selected="selected">In Progress</option>
        <option value="approved">Approved</option>
        <option value="rejected">Rejected</option>
        <option value="shipped">Shipped</option>
        <option value="delivered">Delivered</option>
      </select>
      <p class="inline-errors">is not included in the list</p> 
    </li>  

validation1.json

var edit_order_2 = 
{
    "type":"Formtastic::SemanticFormBuilder",
    "inline_error_class":"inline-errors",
    "validators":
    {
        "order[status]":
        {
            "presence":
            {
                "message":"can't be blank"
            },
            "inclusion":
            {
                "message":"is not included in the list",
                "in":"[ \"created\", \"in_progress\", \"approved\", \"rejected\", \"shipped\", \"delivered\" ]"
            }
        }
    }
};   

validation2.json

var edit_order_2 = 
{
    "type":"Formtastic::SemanticFormBuilder",
    "inline_error_class":"inline-errors",
    "validators":
    {
        "order[status]":
        {
            "presence":
            {
                "message":"can't be blank"
            },
            "inclusion":
            {
                "message":"is not included in the list",
                "in":"[ :created, :in_progress, :approved, :rejected, :shipped, :delivered ]"
            }
        }
    }
};