How to map more than one Attribute with ActiveRecord?

Question

Hi Guys, quick question.

If I type in my console

u = User.first
u.friends(&map:username)

I geht ["Peter", "Mary", "Jane"]

But I also want to show the birthday, so how do I do that?

u.friends(&map:username, &map:birthday)

doesn't work thanks in advance

Answer 1

you can use the alternate block syntax:

u.friends.map{|f| [f.username, f.birthday]}

would give an array of arrays

u.friends.map{|f| "#{f.username} - #{f.birthday}"}

would give you an array of strings... you can do quite a bit from there.

Answer 2

Try

u.friends.map {|friend| [friend.username, friend.birthday]}

The & syntax is simply a shorthand to the underlying Ruby method.