How to add new attribute to ActiveRecord

Question

After getting all values from model, I want to add another custom attribute to the ActiveRecord class (this attribute is not a column in db) so that I could use it in view, but

Answer 1

@test.all

@test.each do |elm|
    write_attribute(:newatt, "added string")
end

Answer 2

If it's really just temporary it doesn't have to be in the object:

@test.all
@test_temp = []

@test.each do |elm|
    @test_temp << {:elm => elm, :newatt => 'added string'}
end   

Otherwise, there are also good answers here.