Add reCAPTCHA to Users::RegistrationsController#create

app/controllers/users/registrations_controller.rb

@@ -4,6 +4,8 @@ class Users::RegistrationsController < Devise::RegistrationsController
   skip_after_action :verify_authorized
   skip_after_action :verify_policy_scoped
 
+  prepend_before_action :check_captcha, only: :create
+
   # before_action :configure_sign_up_params, only: [:create]
   # before_action :configure_account_update_params, only: [:update]
 
@@ -67,4 +69,13 @@ protected
   def after_update_path_for(_resource)
     edit_user_registration_path
   end
+
+  def check_captcha
+    return if verify_recaptcha
+
+    self.resource = resource_class.new sign_up_params
+    resource.validate
+    set_minimum_password_length
+    render :new
+  end
 end

app/views/users/registrations/new.html.erb

@@ -16,6 +16,10 @@
       <%= f.input :password_confirmation,
                   required: true,
                   input_html: { autocomplete: 'new-password' } %>
+
+      <div class="mb-3">
+        <%= recaptcha_tags %>
+      </div>
     </div>
 
     <div class="form-actions">