自定义error_messages_for定制校验信息

ruby 代码

module ApplicationHelper
  def error_messages_for(*params)
    options = params.last.is_a?(Hash) ? params.pop.symbolize_keys : {}
    objects = params.collect {|object_name| instance_variable_get("@#{object_name}") }.compact
    count   = objects.inject(0) {|sum, object| sum + object.errors.count }
    unless count.zero?
      html = {}
      [:id, :class].each do |key|
        if options.include?(key)
          value = options[key]
          html[key] = value unless value.blank?
        else
          html[key] = 'errorExplanation'
        end
      end
      header_message = ""#"#{pluralize(count, 'error')} prohibited this #{(options[:object_name] || params.first).to_s.gsub('_', ' ')} from being saved"
      #error_messages = objects.map {|object| object.errors.full_messages.map {|msg| content_tag(:li, msg) } }
      error_messages = objects.map do |object|
        full_messages = []
        object.errors.each do |attr,msg|
          full_messages << msg unless msg.nil? || msg.blank?
        end
        full_messages.map{|msg| content_tag(:li,msg)}
      end
      content_tag(:div,
        content_tag(options[:header_tag] || :h2, header_message) <<
          content_tag(:p, '发生以下错误:') <<
          content_tag(:ul, error_messages),
        html
      )
    else
      ''
    end
  end
end