Ruby on Rails - Validates_inclusion_of in an array

Question

I'm trying to create validations, where it only allows values that are in an array.

validates_inclusion_of :valid_number, :in =>[1,2,3,4,5,6,7,8,9,10]

That works, but what I want is something like this

numbers = [1,2,3,4,5,6,7,8,9,10]

validates_inclusion_of :valid_number, :in => numbers

When I type that I always get a NoMethodError. This leads me to believe maybe I need a different type of variable (instance, class, global).

Just a heads-up, I know there's a way to validate numericality in a range, but that's not what I'm looking for. I just picked numbers because it was quicker to type.

agmcleod · Accepted Answer · 2014-07-29 18:18:24Z

5

Should be able to make it a constant:

NUMBERS = (1..10).to_a
validates_inclusion_of :valid_number, :in => NUMBERS

~~This might work as well, but i haven't tested :)~~

Edit Nope, doesn't work. The below throws an error.

self.numbers = (1..10).to_a
validates_inclusion_of :valid_number, :in => numbers

edited Jul 29, 2014 at 18:18

answered Jul 29, 2014 at 17:46

agmcleod

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1 Comment

Darkmouse Over a year ago

That doesn't work, I get undefined local variable or method numbers. Do we need an @ symbol before the variable name or make self.numbers a method? Of course, I also had my validates statement before the numbers statement. Should it be the other way around? Never mind, that doesn't work either.

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