Alias class methods in Ruby
Yesterday I came across a problem where one possible solution was to alias a class method. I’ve blogged about aliasing methods before, but I didn’t know how to do this for class methods.
Turns out, it’s pretty simple – the syntax is just a bit different.
class Person
def self.all
%w{ Bob Steve }
end
class << self
alias_method :old_all, :all
def all
old = self.old_all
old << "Peter"
old << "Owen"
end
end
end
p Person.old_all
# ["Bob", "Steve"]
p Person.all
# ["Bob", "Steve", "Peter", "Owen"]Happy coding.