Rails 2.3.8 “id”如何？传递给分页示例中的方法？

发布于 2024-09-16 05:17:19 字数 1096 浏览 6 评论 0原文

我正在学习 Michael Hartl 的“通过示例学习 Rails”教程（11.33）。相关代码是：

class PagesController < ApplicationController

  def home

    @title = "Home"
    if signed_in?
      @micropost = Micropost.new
       @feed_items = current_user.feed.paginate(:page => params[:page])
    end
  end

class User < ActiveRecord::Base

  def feed

    Micropost.all(:conditions => ["user_id = ?", id])

  end

module SessionsHelper

  def sign_in(user)

    user.remember_me!
    cookies[:remember_token] = { :value   => user.remember_token,
                                 :expires => 20.years.from_now.utc }
    self.current_user= user
  end

  def current_user=(user)

    @current_user = user
  end


  def current_user

    @current_user ||= user_from_remember_token
  end

@feed_items 然后呈现为“will_paginate”的集合，一切正常。

我的问题是我无法理解 current_user 如何传递到 PagesController 行中的“feed”方法，即

“@feed_items = current_user.feed.paginate(:page => params[:page])”

任何帮助都会很大赞赏

艾伦

原文

I'm working through "Learning Rails by Example" tutorial by Michael Hartl(11.33).The relevant code is:

class PagesController < ApplicationController

  def home

    @title = "Home"
    if signed_in?
      @micropost = Micropost.new
       @feed_items = current_user.feed.paginate(:page => params[:page])
    end
  end

class User < ActiveRecord::Base

  def feed

    Micropost.all(:conditions => ["user_id = ?", id])

  end

module SessionsHelper

  def sign_in(user)

    user.remember_me!
    cookies[:remember_token] = { :value   => user.remember_token,
                                 :expires => 20.years.from_now.utc }
    self.current_user= user
  end

  def current_user=(user)

    @current_user = user
  end


  def current_user

    @current_user ||= user_from_remember_token
  end

@feed_items is then rendered as a collection to "will_paginate" and everything works fine.

My problem is that I cannot understand how the current_user is passed to the "feed" method in the PagesController line ie

"@feed_items = current_user.feed.paginate(:page => params[:page])"

Any help will be greatly appreciated

Alan

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家住魔仙堡 2024-09-23 05:17:19

current_user 永远不会“传递”到 feed 方法 - feed 方法在 current_user 上调用对象。看一下 User 模型：

def feed
  Micropost.all(:conditions => ["user_id = ?", id])
end

这是一个实例方法，当您调用 current_user.feed 时执行。 :conditions 哈希中的 id 指的是用户对象实例的 id，在本例中为 current_user。

current_user is never "passed" to the feed method - the feed method is called on the current_user object. Take a look at the User model:

def feed
  Micropost.all(:conditions => ["user_id = ?", id])
end

This is an instance method which is executed when you call current_user.feed. The id in the :conditions hash refers to the id of the user object instance, in this case current_user.

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