Setting an attribute in a rails concern

Asked Oct 05 '17 at 12:00

Active Oct 05 '17 at 13:54

Viewed 259 times

How can I set an attribute in a rails concern?

here is my concern:

module Nodeable
  extend ActiveSupport::Concern
  def set_lat                
    lat = 5
  end
end

And then if i try to use it

test = Item.first
test.set_lat
test.save!

Check if it worked:

test.lat
=> nil

edited Oct 05 '17 at 12:06

asked Oct 05 '17 at 12:00

Will

Use explicit self: `self.lat = 5` – Sergio Tulentsev Oct 05 '17 at 12:01
the answer is to have self.lat = not lat = – Will Oct 05 '17 at 12:06
That's what I said :) – Sergio Tulentsev Oct 05 '17 at 12:07
this is a more specific question, much easier to understand than the candidate for duplicate – Will Oct 05 '17 at 12:07
Yes, a better dup target undoubtedly exists. But this one is "good enough", I think. – Sergio Tulentsev Oct 05 '17 at 12:12
Unless you use implicit self as mentioned by @sergio-tulentsev you are just assigning a local variable in the method - not the instance variable of the object that includes the module. – max Oct 05 '17 at 13:23
1

I think I found a better dup @SergioTulentsev – max Oct 05 '17 at 14:00
@max: yep, this one is indeed better. – Sergio Tulentsev Oct 05 '17 at 14:02
guys, that isn't a great choice at all. – Will Oct 06 '17 at 10:03

0 Answers0