Question

当用户尝试投票而没有先登录时，我收到此错误：

未定义的方法`vote_for'为nil：NilClass

我有一个常规的“Post”脚手架，用户正在对帖子进行投票。如果他们尚未登录，如何插入将其重定向到user_sign_in的命令？

class PostsController < InheritedResources::Base
  def vote_up
  begin
  current_user.vote_for(@post = Post.find(params[:id]))
  redirect_to [@post]
  flash[:success] = "You have voted successfully"
rescue ActiveRecord::RecordInvalid
  redirect_to [@post]
  flash[:error] =  "You have already voted"
  end
 end

end

Answer 1

在before_filter :authenticate_user!中添加PostController。在authenticate_user!方法中，检查用户会话，以及用户是否未重定向到sign_in路径。

编辑：正如您已经添加了before_filter的Devise，如果用户未登录，则应该注意重定向以登录路径。以下内容仅适用于vote_up操作，如果您对所有操作都喜欢相同的行为，然后您可以用before_filter :authenticate_user!

替换该行

class PostsController < InheritedResources::Base 
  # Add before_filter here and devise should handle the redirection if the user is not signed in.
  before_filter :authenticate_user!, only: [:vote_up]

  def vote_up
  begin
  current_user.vote_for(@post = Post.find(params[:id]))
  redirect_to [@post]
  flash[:success] = "You have voted successfully"
rescue ActiveRecord::RecordInvalid
  redirect_to [@post]
  flash[:error] =  "You have already voted"
  end
 end

end

Ruby on Rails Thumbs_up重定向到用户登录

1 个答案: