# Formulir Rails (Ruby on Rails)

> form_with, model forms, form_for legacy, strong parameters, nested attributes, file uploads

- 20 pertanyaan wawancara
- Mid-Level
- [Pertanyaan Wawancara: Ruby on Rails](https://sharpskill.dev/id/technologies/ruby-on-rails/pertanyaan-wawancara.md)

## 1. Apa form helper yang direkomendasikan di Rails 5.1+ untuk membuat formulir?

**Jawaban**

form_with adalah helper terpadu yang diperkenalkan di Rails 5.1 yang menggantikan form_for dan form_tag. Secara default ia menghasilkan formulir dengan remote: true (permintaan AJAX) dan menyederhanakan sintaks dengan mendeteksi secara otomatis apakah objek model diteruskan. Penyatuan ini mengurangi kebingungan antara dua helper lama dan menyediakan API yang lebih konsisten.

## 2. Apa perbedaan antara form_with model: @user dan form_with url: users_path?

**Jawaban**

Dengan model: @user, Rails secara otomatis menentukan URL dan metode HTTP berdasarkan keadaan objek (new_record? atau persisted?). Untuk record baru, ia menggunakan POST ke users_path, untuk yang sudah ada, PATCH ke user_path(@user). Dengan url: users_path, URL dan metode HTTP yang sesuai harus ditentukan secara manual.

## 3. Bagaimana cara menonaktifkan pengiriman AJAX default dari form_with untuk mendapatkan pengiriman HTML klasik?

**Jawaban**

Secara default, form_with menghasilkan formulir dengan data-remote='true' yang mengirim permintaan AJAX. Untuk mendapatkan pengiriman HTML tradisional dengan pemuatan ulang halaman, local: true harus ditambahkan. Mulai dari Rails 6.1, perilaku default dapat dikonfigurasi secara global melalui config.action_view.form_with_generates_remote_forms.

## 17 pertanyaan lagi tersedia

- Apa peran strong parameters dalam konteks formulir Rails?
- Bagaimana cara mendefinisikan dengan benar metode strong parameters untuk model Article dengan title dan content?

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