如何获取current_user的用户角色的信息

Question

I have a roles based authentication with devise gem; all users can has many roles and how can i retrieve just user role slug for the current_user?

now in my User.rb model i have created a method called get_role

User.rb

def get_role
  roles.each { |role| role.slug.downcase }
end

i call this method in a view like that

current_user.get_role

and it returns this:

[#<Role id: 3, name: "Seller", created_at: "2013-01-10 21:04:46", updated_at: "2013-01-10 21:04:46", slug: "Venditore">]

why if a call an each block in that method? Thanks

Answer 1

Use map ( doc for map method ) instead of each ( doc for each method ):

def get_role
  roles.map { |role| role.slug.downcase }
end

When you iterate a collection with each the returned value will be the collection itself. each iterator is for doing something with each element. And it's property allow you to write chains of each method calls:

workers.each{ |w| w.take_a_break }.each{ |w| w.just_joke_go_to_work }

Not very smart example, because we may do just:

workers.each{ |w| w.take_a_break; w.just_joke_go_to_work }

But just as an example.