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我有一個Rails應用程序，其中我有一個實體模型，它有一個類型和類別模型，我試圖使用fields_for但我已經有了現有的數據，我不需要創建一個新的，所以我的問題是，有可能，是否有另一個具有此功能的輔助方法？或者我應該保持通過Ajax將它們動態顯示在頁面中，然後通過json向用戶發送選擇的方式？fields_for rails with existing data
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我想讀Rails的指南可以幫助你（不僅是這個問題）
http://guides.rubyonrails.org/form_helpers.html#building-complex-forms
此外，檢查出瑞恩·貝茨
http://railscasts.com/episodes/196-nested-model-form-part-1
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你不需要阿賈克斯那裏。您能否請您張貼一些您已經嘗試過的代碼，以便我們能夠繼續解決您的問題？ – vee