gistfile1.rb

def self.search_filter(name,manufacture_id,product_type_id)
  f_manufacture_id = manufacture_id
  f_manufacture_id = f_manufacture_id.join(', ') unless manufacture_id.nil?

  result = order("id DESC")
  result = result.where("name LIKE ?", "%#{name}%") unless name.empty?
  result = result.where("manufacture_id IN (?)", f_manufacture_id) unless manufacture_id.nil?
  result = result.where(:product_type_id => product_type_id) unless product_type_id.blank?

  result
end