ruby - Using constraints in Rails to change the default root_path for some users -

i looking way change default routing (root_path specifically) of app using other simple if/then check different types of users. found this code example online, can't make work app , main problem don't understand underlying code does, therefore cannot adapt code app.

first create rule in router:

root 'admin#index', constraints: roleconstraint.new(:admin) 

then create new file called role_constrait.rb in lib directory , user code:

class roleconstraint   def initialize(*roles)     @roles = roles   end    def matches?(request)     @roles.include? request.env['warden'].user.try(:role)   end end 

i see guy using warden here, using cancan, , since piece of code makes no sense me, can't make changes it, have tried, keep getting undefined local variable or method `root_path' error.

would highly appreciate help!

i don't think router should in charge of doing that. it's hard implement , hard test. more than, it's extremely inconsistent - different users see different things under same url. normally, people wrap admin area /admin scope.

so, suggestion routing straightforward (just /admin scope), , put authentication logic controllers (e.g. admincontroller).

if need further advice, ask.