Error in Form Submisson with Rails and Hotwire

Question

I am running rails 6.1 with hotwire. I am creating a login form take email and password and then redirect to the store_index path. However, I am running into this error- Error: Form responses must redirect to another location. I have tried the following things but getting the same error,

1. Using format.html { redirect_to store_index_path}

2. I commented out everything in the create function and added puts "Hello". However, i still got the same error.

I an confused now, any help

  <%= form_with url: retailer_log_in_path, class: 'box'  do |f| %>
    <div class="field">
        <%= f.label 'email:', class: "label"%><br>
        <%= f.text_field :email, class: "input" %>
    </div>
    <div class="field">
        <%= f.label 'password:' ,class: "label"%><br>
        <%= f.password_field :password, class: "input" %>
    </div>
    <div class="field">
        <%= f.submit 'Log In', class: "input" %>
    </div>
  <% end %>

session controller.rb

def create
        retailer = Retailer.find_by(email: params[:email])
        if retailer.present? && retailer.authenticate(params[:password])
            session[:retailer_id] = retailer.id 
            redirect_to store_index_path
        else
            flash.now[:alert] = 'Invalid email or password'
            render :new
        end
    end

Answer 1

If you want to use turbo drive form submission you have to return 4xx or 5xx response code for validation errors from your controller:

eg

render :new, status: :unprocessable_entity

In your code, it should look like this:

    def create
        retailer = Retailer.find_by(email: params[:email])
        if retailer.present? && retailer.authenticate(params[:password])
            session[:retailer_id] = retailer.id 
            redirect_to store_index_path
        else
            flash.now[:alert] = 'Invalid email or password'
            render :new, status: :unprocessable_entity
        end
    end

You can find more info in Turbo documentation https://turbo.hotwired.dev/handbook/drive#redirecting-after-a-form-submission