how to generate AuthenticityToken on rails

Question

I build the form tag by myself and when I post the form to server it give me a InvalidAuthenticityToken error, so I want to know how to add it in my own in curr

Answer 1

To generate the token you have to use the method: form_authenticity_token as it was correctly noted by @flitzwald. Since it is rediced in a active controller's concern, you must include the module into a controller expclicitly before using as follows:

include ActionController::RequestForgeryProtection

# use

def set_csrf_header
  response.headers['X-CSRF-Token'] = form_authenticity_token
end