How do I create instance variables from an array?

Question

I'm using Rails 3.2. Here's my code:

transports = %w(car bike)

transports.each do |transport|
  @transport = transport.classify.all
end

That code is not working, but I want the results to be:

@cars = Car.all
@bikes = Bike.all

How do I do that?

toro2k · Accepted Answer · 2013-05-14 17:03:19Z

5

transports.each do |transport|
  instance_variable_set("@#{transport}", 
                        transport.classify.constantize.all)
end

Update Given that the entries in the transports array are now singular the correct code to get the result you want is

transports.each do |transport|
  instance_variable_set("@#{transport.pluralize}", 
                        transport.classify.constantize.all)
end

edited May 14, 2013 at 17:03

answered May 14, 2013 at 14:26

toro2k

19.3k8 gold badges66 silver badges72 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Beat Richartz Over a year ago

If you change transport.classify.all to transport.classify.constantize.all, your answer will be correct. classify does not get the class constant. Also, you will not need to pluralize the transport string, since it is already in plural form.

Victor Over a year ago

Many many thanks. Can I post a follow-up question: stackoverflow.com/questions/16555660

Collectives™ on Stack Overflow

How do I create instance variables from an array?

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related