加载嵌套模型的问题

我有一些模型 - NewsArticle，Comment，User（as：author）和Profile。加载嵌套模型的问题

class NewsArticle < ActiveRecord::Base 
    belongs_to :author, :class_name => "User", :foreign_key => "user_id" 
    has_many :comments, :as => :commentable, :dependent => :destroy, :order => 'created_at', :include => 'translations' 
end 

class Comment < ActiveRecord::Base 
    belongs_to :author, :class_name => "User", :foreign_key => "user_id" 
    belongs_to :commentable, :polymorphic => true, :counter_cache => true 

    default_scope :include => [{:author => :profile}, :translations] 
end 

class User < ActiveRecord::Base 
    has_one :profile 
    accepts_nested_attributes_for :profile 
end 

class Profile < ActiveRecord::Base 
    belongs_to :user 
end

正如你可以看到 - 我有注释与配置文件渴望负荷作者default_scope，但遗憾的是它不工作:(此外，我已经试过

def show 
    @news_article = NewsArticle.find(params[:id], :include => {:comments => {:author => :profile}}) 
    @comments = @news_article.comments(:order => "created_at DESC") 

    respond_to do |format| 
     format.html 
     format.xml { render :xml => @news_article } 
    end 
    end

，但没有更新NewsArticleController改变:(

在有评论渲染NewsArticle我看到疯狂的负载数据库能否请你帮我优化

PS：？争夺w是低于

news_articles/show.html.haml

.comments 
    %h2 
    %a{:id => 'comments', :name => 'comments'} 
     - if @news_article.comments_count == 0 
     No comments 
     - else 
     #{pluralize(@news_article.comments_count, I18n.t(:"global.words.comment"))} 

    %ul 
    - @comments.each do |comment| 
     = render :partial => "comment", :object => comment, :locals => {:source => source}

news_articles/_comment.html.haml

%li.comment.white-box 
    .title 
    %acronym{ :title => "#{comment.created_at.strftime(formatted_datetime)}"} 
     = comment.created_at.strftime(formatted_datetime) 
    %p 
     = I18n.t(:"global.words.by") 
     %a{ :href => "#" } 
     = link_to_author_of comment 

    .text 
    :cbmarkdown 
     #{comment.body} 

    %br/ 
    .controls 
    = link_to I18n.t(:"flags.controls.flag"), flag_comment_path(comment, :source => source), :class => 'flag-link', :rel => 'nofollow' 
    = link_to I18n.t(:"comments.controls.destroy"), comment_path(comment, :source => source), :confirm => I18n.t(:"global.messages.are_you_sure"), :method => :delete

PPS：伙计们，对不起 - 我忘了通知您的型号用户和配置文件位于另一个数据库中，即可通过

establish_connection "accounts_#{RAILS_ENV}"

目前 - 它清楚为什么包含/连接不起作用，但也许你有任何想法如何优化对帐户数据的DB请求？

来源

2010-08-11 Alexey Poimtsev

能否请您从您的视图发布的代码？ – 2010-08-11 17:04:16

更新了视图:) – 2010-08-11 20:43:55

我已经更新了我的问题:)对不起，因为缺少详细信息:) – 2010-08-14 06:41:20

尝试：加入代替：在您的NewsArticle.find

此链接可能会有所帮助 Rails :include vs. :joins

来源

2010-08-12 04:14:34 house9

我已更新我的问题:)遗憾的遗漏细节:) – 2010-08-14 06:40:53

加载嵌套模型的问题

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