gem "recaptcha", require: "recaptcha/rails"
Ruby on rails recaptcha
https://www.paypal.com/donate?hosted_...
gem "recaptcha" github
Protect your email from any spam or rebut email by using recaptcha gem
integrate Google reCAPTCHA in your website
Ruby on rails website email protection
Install Google Recaptcha
gem "recaptcha" for ruby on rails
Recaptcha site key and public key
RECAPTCHA_PUBLIC_KEY
recaptcha_tags
verify_recaptcha
undefined method public_key= for # Recaptcha
We detected that your site is verifying reCAPTCHA passed solutions less than 50% of the time. This could indicate a problem with your integration with reCAPTCHA. Please see our developer site for more information.
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