急於在Rails 3中加載？

Question

我正在嘗試學習如何提高Rails應用程序的性能，並且我正在查看的第一步是熱切加載。

我已經配置了子彈寶石，它顯示了我可以在哪裏使用急切的加載，但是，我不太清楚如何使用幫助！

一個例子日誌：

2012-04-26 15:59:34 
0.0.0.0:3000http://0.0.0.0:3000/animals 
N+1 Query detected 
    Animal => [:client] 
    Add to your finder: :include => [:client] 
N+1 Query method call stack 
    N+1 Query method call stack 
    /Users/dannymcclelland/Projects/premvet/app/views/animals/index.html.erb:26:in `block in _app_views_animals_index_html_erb__2796162405947806753_70316525286320' 
    /Users/dannymcclelland/Projects/premvet/app/views/animals/index.html.erb:22:in `_app_views_animals_index_html_erb__2796162405947806753_70316525286320' 
    /Users/dannymcclelland/Projects/premvet/app/controllers/animals_controller.rb:7:in `index'2012-04-26 15:59:34[WARN] user: dannymcclelland 
0.0.0.0:3000http://0.0.0.0:3000/animals 
Unused Eager Loading detected 
    Animal => [:id, :AnimalName, :Species] 
    Remove from your finder: :include => [:id, :AnimalName, :Species]2012-04-26 16:00:56 

即跳出線路有：

N+1 Query detected 
Animal => [:client] 
Add to your finder: :include => [:client] 

和

Unused Eager Loading detected 
Animal => [:id, :AnimalName, :Species] 
Remove from your finder: :include => [:id, :AnimalName, :Species] 

我什麼不確定的，是什麼東西的定義'發現者'。它是視圖中的塊還是它在控制器中？

以日誌的第一部分是跳出我的控制器如下：

def index 
@animals = Animal.page(params[:page]).per_page(15) 

respond_to do |format| 
    format.html # index.html.erb 
    format.json { render json: @animals } 
end 
end 

模型：

class Animal < ActiveRecord::Base 
    self.table_name = 'animal' 
    self.primary_key = 'PVID' 

    attr_accessible :AddedBy, :Age, :AnimalBFAmount, :AnimalBalance, :AnimalName, :Archive, :BillType, :Breed, :ChronicStatus, :Class, :Classification, :ClientKey, :Colour, :Date1, :DateOfBirth, :DateofBirth, :Dead, :DiaryQueue, :DiscField, :DrugsAtCost, :DrugsNoVAT, :ESDAmount, :ESDType, :FNote, :FirstRegisteredDate, :Height, :IDNumber, :Insured, :InsuredWith, :IsClient, :IsClientDate, :IsMaster, :LastBilledAmount, :LastBilledDate, :LastConsDate, :LastContributionDate, :LastPaidDate, :LastWeightDate, :Locked, :LoyaltyMultiplier, :LoyaltyPoints, :MR_Flag_0, :MR_Flag_1, :MR_Flag_10, :MR_Flag_11, :MR_Flag_12, :MR_Flag_13, :MR_Flag_14, :MR_Flag_15, :MR_Flag_2, :MR_Flag_3, :MR_Flag_4, :MR_Flag_5, :MR_Flag_6, :MR_Flag_7, :MR_Flag_7, :MR_Flag_8, :MR_Flag_9, :Mileage, :Neutered, :NextApptDate, :ORT, :OldSex, :Opt_Flag_0, :Opt_Flag_1, :Opt_Flag_2, :Opt_Flag_3, :Opt_Flag_4, :Opt_Flag_5, :Opt_Flag_6, :Opt_Flag_7, :PVID, :PreferredContact, :PreferredUser, :Ref1, :RefPrac, :ReferredBy, :SSDType, :SeenInPeriod, :SendBill, :Sex, :SiteAnimal, :Species, :Status, :SurcAmount, :SurcType, :SurgeryNumber, :TBU, :TOSAmount, :TOSDrugs, :TOSFees, :TOSType, :Weight 

    belongs_to :client, :foreign_key => 'ClientKey' 
    has_many :clinicals, :foreign_key => 'PVID' 
    has_many :labs, :foreign_key => 'PVID' 
    has_many :consults, :foreign_key => 'pvid' 
    has_many :sheets, :foreign_key => 'PVID' 

    default_scope :order => "Dead ASC, AnimalName ASC" 
end 

請注意，我使用的是舊的數據庫，因此怪列名等

該視圖包含以下內容：

<% @animals.includes(:client).each do |animal| %> 
    <tr> 
    <td><%= animal.id %></td>  
    <td><%= animal.AnimalName %></td> 
    <td><%= link_to animal.client.Surname, animal.client %></td>  
    <td><%= animal.Species %></td> 
    <td><%= animal.Breed %></td> 
    <td><%= animal.Dead %></td>  
    <td><%= link_to 'Show', animal %></td> 
    </tr> 
<% end %> 

那麼，我應該將其他推薦列添加到視圖'finder'嗎？或者別的地方？

任何幫助，將不勝感激！

Answer 1

在你的控制器，你要更新您的查詢，包括客戶端：

@animals = Animal.includes(:client).page(params[:page]).per_page(15)