Hi everybody
i am new developer in ROR. now i have one question to ask?
i am using devise for authentication.it is work very well .but when i
select data (category or sub_category) from database in
app/views/layouts/application.html.erb and then i click sign_in it show
errors as shown below:
NoMethodError in Devise::Sessions#new
Showing *C:/railsapp/facepro/app/views/layouts/application.html.erb* where
line *#28* raised:
undefined method `each' for nil:NilClass
Extracted source (around line *#28*):
25
26
27
28
29
30
31
<li><a href="/">Home</a></li>
<li><a href="#">Products</a>
<ul class="dropdown-menu">
<% @categories.each do |category| %>
<li><a href="#"><%= category.category_name
%></a>
<ul class="dropdown-menu">
please help me!
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