Rails 3 Action Mailer未初始化的常量 [英] Rails 3 Action Mailer uninitialized constant

问题描述

发布新评论后，我尝试使用actionmailer通知我，但我不断收到错误消息：

I'm trying to use actionmailer to notify me when a new comment has been posted but I keep getting the error:

uninitialized constant CommentsController::CommentMailer

该注释已添加到我的数据库中并且可以查看。我也在使用devise，它的电子邮件功能也可以正常工作。

The comment is added to my database and can be viewed. I am also using devise and it's email functions are working fine.

我的评论邮件：

class CommentMailer < ActionMailer::Base
  def newcomment(comment)
  mail(:to => "[e-mail]", :subject => "New Comment")  
  end  
end

和我的控制器部分：

def create
  @comment = Comment.new(params[:comment])
  @comment.user_id = current_user.id

respond_to do |format|
  if @comment.save
    CommentMailer.newcomment(@comment).deliver
    format.html { redirect_to @comment, notice: 'Comment was successfully created!' }
    format.json { render json: @comment, status: :created, location: @comment }
  else
    format.html { render action: "new" }
    format.json { render json: @comment.errors, status: :unprocessable_entity }
  end
 end
end

推荐答案

如果您将邮件文件命名错误，也会发生这种情况。 UserMailer.rb 会损坏，而 user_mailer.rb 是预期的。

This can also happen if you name your mailer file wrong. UserMailer.rb will break whereas user_mailer.rb is what is expected.

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