Methods
C
Instance Public methods
csrf_meta_tag()

Alias for csrf_meta_tags

csrf_meta_tags()

Returns meta tags “csrf-param” and “csrf-token” with the name of the cross-site request forgery protection parameter and token, respectively. 

  <head>
    <%= csrf_meta_tags %>
  </head>

These are used to generate the dynamic forms that implement non-remote links with :method.

Note that regular forms generate hidden fields, and that Ajax calls are whitelisted, so they do not use these tags.

This method is also aliased as csrf_meta_tag

Source: show | on GitHub 

    # File actionpack/lib/action_view/helpers/csrf_helper.rb, line 19
19:       def csrf_meta_tags
20:         if protect_against_forgery?
21:           [
22:             tag('meta', :name => 'csrf-param', :content => request_forgery_protection_token),
23:             tag('meta', :name => 'csrf-token', :content => form_authenticity_token)
24:           ].join("\n").html_safe
25:         end
26:       end