namespace doesn't use layout engine that set globally!

namepace.rb

# configure block
configure do
  set :views	, "assets"
  set :erb	, :layout => :"views/layout"
  enable :sessions
end

.
.
.

namespace "/login/?" do
  get do
    ...
    erb :"views/auth/login" # by default this erb file doesn't load the layout engine that set globally
  end
  post do
    ...
  end	
end

# after adding this code inside namespace is work
namespace "/login/?" do
  get do
    ...
    erb :"views/auth/login" , :layout => :"views/layout" # layout engine work perfectly!
  end
  
  post do
    ...
  end
end