重构在控制器中生成的动作代码

Question

如果我生成一个脚手架，我会得到标准动作索引，new，show，create ....所有这些都包含一行，例如喜欢

@comment = Comment.find(params[:id])

将此行以单独的方法放入控制器（如

）是否有意义

def load
@comment = Comment.find(params[:id])
end

这是一个优势吗？感谢你的时间

Answer 1

是单独的方法，是的，使用before_filter也是。

class CommentsController < ApplicationController
  # Whitelist your before_filter like this. Or you can blacklist it with :except => []
  before_filter :load_comment, :only => [:edit, :update, :destroy, :show]

  def show
  end

  def index
    @comments = Comment.all 
  end

  def new
    @comment = Comment.new
  end

  # etc ...

  protected

  def load_comment
    @comment = Comment.find(params[:id])
  end
end