Where子句不再適用於Rails 3.2.3？

Question

我升級到Rails 3.2.3，突然這個代碼將不再有效：

def self.search(query, project_id, person_id) 
    if query 
     where("number LIKE ?", "%#{query}%") 
    elsif project_id 
     where("project_id LIKE ?", project_id) 
    elsif person_id 
     where("projects.person_id = ?", person_id)  
    else 
     scoped 
    end 
    end 

這是最後where條款觸發錯誤：

SQLite3::SQLException: no such column: projects.person_id: SELECT COUNT(DISTINCT "invoices"."id") FROM "invoices" LEFT OUTER JOIN "items" ON "items"."invoice_id" = "invoices"."id" LEFT OUTER JOIN "payments" ON "payments"."invoice_id" = "invoices"."id" WHERE "invoices"."user_id" = 1 AND (projects.person_id = '1') 

在我的模型全部belongs_to和has_many語句設置正確，它在我以前版本的Rails中工作（不確定哪一個是通過）。

有人可以告訴我如何再次得到這個工作？

感謝您的任何幫助。

Answer 1

我相信你將不得不加入projects表：

.. 
    elsif person_id 
     joins(:projects).where("projects.person_id = ?", person_id)  
    else 
..