This method is deprecated or moved on the latest stable version.
The last existing version (v2.2.1) is shown here.
request_method()
public
The true HTTP request \method as a
lowercase symbol, such as :get. UnknownHttpMethod is
raised for invalid methods not listed in ACCEPTED_HTTP_METHODS.
# File actionpack/lib/action_controller/request.rb, line 28
def request_method
method = @env['REQUEST_METHOD']
method = parameters[:_method] if method == 'POST' && !parameters[:_method].blank?
HTTP_METHOD_LOOKUP[method] || raise(UnknownHttpMethod, "#{method}, accepted HTTP methods are #{HTTP_METHODS.to_sentence}")
end