Rails form_for的authenticated参数无效问题咨询

First off, that authenticated: true parameter you're seeing in the form_for call? It's not a valid option for Rails' form helpers—so Rails just ignores it entirely, which is why it doesn't show up in your generated HTML. Let's break down what's going on here and fix it, based on what the original dev was probably trying to do.

What the original developer likely intended #

It sounds like they wanted to either:

• Ensure the form includes an authenticity token (for CSRF protection), or
• Restrict form submission to authenticated users only

Let's tackle both scenarios:

1. Ensuring the authenticity token is present #

Rails handles CSRF protection out of the box, but the behavior differs a bit for remote forms:

• For regular (non-remote) forms, Rails automatically adds a hidden authenticity_token field to the form.
• For remote: true forms, Rails instead sends the CSRF token via the X-CSRF-Token HTTP header when making the AJAX request—you won't see it as a form field in the HTML.

If you want to explicitly include it as a form field anyway (though it's unnecessary for remote forms), you can add it manually inside the form block:

<%= form_for @house, url: action_path, method: "PATCH", remote: true, html: { id: 'house-edit-contact' } do |f| %>
  <%= hidden_field_tag :authenticity_token, form_authenticity_token %>
  <!-- rest of your form fields -->
<% end %>

Just double-check that CSRF protection is enabled in your app (it's on by default): in config/application.rb, you should have:

config.action_controller.default_protect_from_forgery = true

2. Restricting submission to authenticated users #

If the goal was to make sure only logged-in users can submit this form, the authenticated: true parameter won't do anything. You need to handle this at the controller level:

• If you're using Devise for authentication, add a before_action to your HousesController:

  class HousesController < ApplicationController
    before_action :authenticate_user!, only: [:update] # or whichever action handles this PATCH request
    # ... rest of your controller code
  end
  

• If you have a custom authentication system, add your own check (e.g., before_action :require_login where require_login redirects unauthenticated users).

Modified form code (without the invalid parameter) #

Since authenticated: true doesn't serve any purpose, remove it from your form_for call:

<%= form_for @house, url: action_path, method: "PATCH", remote: true, html: { id: 'house-edit-contact' } do |f| %>
  <%= f.label :website, 'website: ' %>
  <%= f.text_field :website %>
  <br>
  <%= f.label :phone, 'phone: ' %>
  <%= f.text_field :phone %>
  <br><br>
  <%= f.submit "Submit Changes" %>
<% end %>

内容的提问来源于stack exchange，提问作者theghall