I have received some files from Japanese clients and have trouble with reading it through Vim, it…
200,000,000+ 的下載量是什麼概念?
在許多場合需要統計 has_many 一對多關聯的資料數量,若使用單純的 Rails 關聯查詢,則每次讀取頁面都會重新再統計一次,影響網站效能。
has_many
Is that a question?