Rails Validates less than 0 or greater than 0, or field not equal to 0

Question

I've added validation to my Rails model for less_than and greater_than, but they obviously conflict each other.

I want to make sure Rails validates a field on model to never be 0. So less than OR greater than 0, but not both because that's not possible.

How can I do this?

Answer 1

There is already a validator for this called numericality

http://edgeguides.rubyonrails.org/active_record_validations.html#numericality

class Player < ApplicationRecord
  validates :salary, numericality: { other_than: 0 }
end

Answer 2

validate :non_zero

def non_zero
  if self.field_name == 0
     self.errors.add(:field_name, "Field can't be zero")
  end
end