ruby on rails NoMethodError in User#new

Showing app/views/mahasiswa/new.html.erb where line #3 raised:

undefined method `mahasiswas_path' for # 

Extracted source (around line #3):
1: Add Mahasiswa
2: 
3: <% form_for (@mahasiswa) do |f| %> 
4:

5: Nama 
6: <%= f.text_field :nama %>

TRY..

<% form_for(@mahasiswa) do |f| %>

Should be

<% form_for(:mahasiswa) do |f| %>
 

good luck