Question

我已经创建了一个用户帮助器：

module UserHelper

  def user_photo user, size = 30
    image_tag user_avatar_url(user, size), :height => size, :width => size, :title => user_name(user), :alt => '' if user
  end

  alias :user_avatar :user_photo

  def user_avatar_url user, size = 30
    user.image ? user.image.thumb("#{size}x#{size}#").url : asset_path('icons/unknown-user-icon.png')
  end
end

然而，我收到错误：

undefined method `asset_path' for #<UserProfileHtmlTemplater:0x0000000680aad8>

目前我有以下内容：

class UserProfileHtmlTemplater < CompanyTextTemplater

  include Rails.application.routes.url_helpers
  include ActionView::Helpers::UrlHelper
  include ActionView::Helpers::OutputSafetyHelper 
  include ActionView::Helpers::AssetTagHelper 
  include ActionView::Helpers::TagHelper 
  include UserHelper

....
  def prepare_locals_for(user)
    Hash.new.tap do |locals|
      locals[:first_name] = user.first_name
      locals[:last_name] = user.last_name
      locals[:email] = user.email

      locals[:photo]   = raw user_photo(user, '200x200>')
      user.profile.visible_fields.each do |field|
        locals[field.label] = field.value
    end
  end
end

Answer 1

问题可能在于asset_path在Sprockets（Sprockets::Helpers::RailsHelper）中定义，而且不在您的包含帮助程序中。

我宁愿建议使用image_path中定义的path_to_image帮助器（或其别名AssetTagHelper）而不是包含另一个帮助器，而在您的情况下，应该使用框。

Answer 2

尝试添加：

include Sprockets::Helpers::RailsHelper
include Sprockets::Helpers::IsolatedHelper

它会解决您的问题。

自定义类中的asset_path

2 个答案: