```ruby
# Here you define the fundamentals of your application.
#
# Add a model:
# model 'customer' do |customer|
#   customer.attr :name
#   customer.attr :birth, type: :date
#   customer.attr :email
# end
#
# Add a web user interface:
# wui 'customer' do |wui|
#   wui.action :index
#   wui.action :show
#   wui.action :lock, scope: :member, method: :post
# end
```

Add navigation to application model template (thereby fix Cucumber scenario)
user
```ruby
# Here you define the fundamentals of your application.
#
# Add a model:
# model 'customer' do |customer|
#   customer.attr :name
#   customer.attr :birth, type: :date
#   customer.attr :email
# end
#
# Add a web user interface:
# wui 'customer' do |wui|
#   wui.action :index
#   wui.action :show
#   wui.action :lock, scope: :member, method: :post
# end
#
# Add navigation
# navigation :main
```
assistant