displays captcha only on new, not edit

app/helpers/recaptcha_helper.rb

@@ -1,4 +1,8 @@
 module RecaptchaHelper
+
+  def recaptchable?
+    @debate.new_record?
+  end
   
   def recaptcha_keys?
     Recaptcha.configuration.public_key.present? && 

app/views/shared/_captcha.html.erb

@@ -1,3 +1,3 @@
-<% if recaptcha_keys?   %>
+<% if recaptchable? and recaptcha_keys? %>
   <%= recaptcha_tags ajax: true, hl: I18n.locale %>
 <% end %>

spec/helpers/recaptcha_helper_spec.rb

@@ -2,6 +2,20 @@ require 'rails_helper'
 
 describe RecaptchaHelper do
 
+  describe '#recaptchable?' do
+
+    it 'should be true if new record' do
+      assign(:debate, build(:debate))
+      expect(helper.recaptchable?).to be true
+    end
+
+    it 'should be false if existing record' do
+      assign(:debate, create(:debate))
+      expect(helper.recaptchable?).to be false
+    end
+
+  end
+
   describe "#recaptcha_keys?" do
 
     it "should be true if Recaptcha keys are configured" do