Rails render not showing in browser, despite positive server reply

Question

I've got an issue using 'render' in Rails. I've got a custom action "search" in my controller, which is supposed to render index, as shown below.

def search
    @date = params[:reserve_date]
    @tables = Table.all
    render 'index'
end

The action is being used in a different view using the following piece of code:

<%= form_with url: search_tables_path do |f| %>
<%= f.date_field :reserve_date %>
<%= submit_tag "SEND" %>
<% end %>

After pressing the 'SEND' button, the 'index' view should be rendered. The server states:

Rendered tables/index.html.erb within layouts/application (25.0ms)

Completed 200 OK in 127ms (Views: 123.2ms | ActiveRecord: 3.0ms)

However, nothing is being displayed in the browser at all. It stays at the previous page with no change. If I try to access the index view via a link like this:

Then the index view is being displayed normally, but of course I don't pass any extra information then. How can I have it render properly?

EDIT Form tag in HTML appears to be complete

<form action="/tables/search" accept-charset="UTF-8" data-remote="true" method="post"><input name="utf8" type="hidden" value="&#x2713;" /><input type="hidden" name="authenticity_token" value="4L/RNvCzlPX8PzDGk2LXcSiyrhzXVU3cwsLUmaQvq10y9HpESbH8CX+74n/UHxLJ5LUdiWYBdoaqCb2jFIYEgw==" />

This is my routes.rb file:

Rails.application.routes.draw do
  devise_for :users

  resources :tables do
  collection do
    post 'search'
    end
  end
  resources :reservations

  root 'home#index'
end

Answer 1

Forms generated with form_with by default has data-remote set to true.

If the data-remote is set to true your form makes an AJAX call. So your view is getting rendered as the response of that AJAX call. That is why you are not getting any errors.

Add local: true in your form_with

You can learn more about form_with from the docs.

Update:

As @julien-lamarche suggested in the comment, in the latest version of Rails, you may also need to add data: { turbo: false } if you are using Turbo, which is the default case in the latest version of Rails.