How to prioritize validations in Ruby on Rails?

Question

Ruby on Rails

validates_presence_of :count
validates :count, numericality: true
validates :count, numericality: { only_integer: true,greater_than: 0}

validate :validate_max_count_sklad_tovar

I set two validations, the second one, which I created, is performed from the very beginning, but it is necessary that after the first one in the list. How to do it?

Answer 1

No way. Your code should not be tied to the order of validations. Inside validate_max_count_sklad_product check if count is a number and only then check against the warehouse.

Answer 2

Did it like this:

class InetSklad < ActiveRecord::Base

  validates :tovar_id, presence: true
  validates :count, presence: true
  validates :count, numericality: true
  validates :count, numericality: { only_integer: true,greater_than: 0}
  
  validate :validate_max_count_sklad_tovar, :if => Proc.new { |a| a.dependent_attributes_valid? }

def dependent_attributes_valid?
    [:tovar_id, :count].each do |field|
      self.class.validators_on(field).each { |v| v.validate(self) }
      if self.errors.messages[field].present?
        self.errors.messages[field]=[self.errors.messages[field][0]] if self.errors.messages[field].kind_of?(Array)
        return false
      end
    end
    return true
  end

works!
spied here