如何在Ruby On Rails 3中爲表MySQL表設置別名？

Question

如何在Ruby On Rails 3中爲MySQL表設置別名？

data = TUP.all :select => 
    "DATE(tup.created_at) as date 
    , ROUND(SUM(fo_count)/#{authors_count}) AS followers" 
    ,:joins => "INNER JOIN tlsts AS tl ON tl.user_id = tup.user_id" 
    ,:conditions => condition 

我的意思是這樣的：我在哪裏可以在此代碼設置別名TUP爲表TwitterUserProfile？
對於什麼參數：from =>？

Answer 1

在模型中使用set_table_name :table_name你想加入該表。例如：

class UserRole < ActiveRecord::Base 
    set_table_name :user_roles # Add user_roles table to UserRole model so, you can make query to that table like: @user_roles = UserRole.all/ @user_role = UserRole.find(params[:id]) etc. 
    end