Question

我想在浏览器控制台或页面上打印一条消息，以便我可以确切地看到每个方法的调用时间。什么都没有打印，我没有找到一个有效的解决方案。我尝试使用flash消息，但它也没有用。我正在学习Rails，所以我想确切地看到被调用的内容以及何时调用。例如，如果调用了create，我想看到一条消息“Create was called！”。我试过这个：

    class PostsController < ApplicationController

  # only index, show, new, and edit pages will have views
  # create, update, and destroy will do some kind of work and then redirect
  # instance variables are visible in our view files
  def index
    @posts = Post.all
  end

  def show
    # find the post and find the id that was passed into the url
    @post = Post.find(params[:id])
    flash[:success] = "SHOW WAS CALLED IN FLASH"
    puts "SHOW METHOD WAS CALLED!"

  end

  def new
    @post = Post.new
  end

  def create
    @post = Post.new(params[:post])
    if @post.save
      redirect_to(posts_path, :notice => "Your post was saved!")

    else
      render "new"
    end
  end

  def edit
    puts "<p>EDIT METHOD WAS CALLED!</p>"

    @post = Post.find(params[:id])
  end

  def update
        puts "UPDATE METHOD WAS CALLED!"

    @post = Post.find(params[:id])

    if @post.update_attributes(params[:post])
      redirect_to posts_path, :notice => "Your post has been saved."
    else
      render "edit"
    end
  end

  def destroy
     puts "DESTROY METHOD WAS CALLED!"

     @post = Post.find(params[:id])
     @post.destroy

     redirect_to(posts_path, :notice => "Post deleted")
  end


end

Answer 1

使用记录器和尾部log/development.log

logger.debug "Method was called"

debug级别日志记录仅记录在开发环境中。如果要登录生产，请使用info

Answer 2

在控制器操作中使用puts不会在浏览器的网页上打印它。如果您使用Webrick，它将打印在运行服务器的终端中。如果要在网页上打印，则需要在与此操作相对应的视图中执行此操作：

在 show.html.erb 中写道：

显示方法已被调用！

您可以使用操作中的Rails.logger在日志文件中记录语句。

Rails.logger.info "SHOW METHOD WAS CALLED!"

这将写入development.log / production.log文件，具体取决于您的应用程序运行的环境。

调用方法时打印到控制台？

2 个答案: