ruby-on-rails - will_paginate 未在网络上显示...

Question

上一个问题在这里: what is the common practice on limit the result in RoR?

这是 users_controller:

def show
  @user = User.find(params[:id]) 

  @posts = @user.posts.paginate :page => params[:page] 

  respond_to do |format|
    format.html # show.html.erb
    format.xml  { render :xml => @user }
  end
end

和我的 show.html.erb:

<%=h @posts.length %> 
<%=h @posts.inspect %> 

<%= will_paginate @posts %>

但在浏览器中，我只得到这个:

4 [#<Post id: 7, title: "I am a root", description: "what can I do", views: 8, created_at: "2010-07-12 15:16:26", updated_at: "2010-07-12 15:16:26", user_id: 32>, #<Post id: 8, title: "root Post two", description: "This is the second one.", views: 2, created_at: "2010-07-12 15:42:57", updated_at: "2010-07-12 15:42:57", user_id: 32>, #<Post id: 9, title: "The third one.", description: "Ok, this is the third ads", views: 3, created_at: "2010-07-12 15:43:18", updated_at: "2010-07-12 15:43:18", user_id: 32>, #<Post id: 10, title: "I type very many", description: "What is very many for?", views: 33, created_at: "2010-07-12 15:43:34", updated_at: "2010-07-12 15:43:34", user_id: 32>]

除此之外，我没有看到任何其他东西。

我试着用控制台解决问题:

>> defined? WillPaginate
=> "constant"
>> [].paginate
=> []
>> ActiveRecord::Base.respond_to? :paginate
=> true

Answer 1

在这种情况下，您看到的正是您应该看到的……will_paginate 方法只会在必要时打印出分页链接。您看不到帖子列表，因为您没有遍历 @posts 数组。尝试添加这个:

<% @posts.each do |post| -%>
  <p>Title: <%= post.title %>
  ...
<% end -%>

除非数组中有 30 条记录(我认为这是默认设置)，否则您可能不会获得分页链接。您也可以在您的 Controller 中执行此操作，以查看使用较小数据集的分页:

@posts = @user.posts.paginate :page => params[:page], :per_page => 2

希望这对您有所帮助!