Rails验证和自定义回调顺序

Question

I have the below validations for one of my models. The goal is to validate presence of first_name, last_name, and shop. Then after (but still before validation), I want to run my custom validation :status.

  validates_presence_of :first_name
  validates_presence_of :last_name
  validates_presence_of :shop

  validate :status, :on => :create

def status
  do stuff with first_name and last_name
end

But it appears that :status is running before the other validations, so I am getting errors for nil first_name etc. How can I correct this?

Answer 1

If you don't want your custom validation to run if the other validations have come back as invalid, do this:

def status
  return if errors.present?
  do stuff with first_name and last_name
end

Answer 2

I will try to help. If status is a field in your table, you have to change the custom validate name. For instance

validates_presence_of :first_name
validates_presence_of :last_name
validates_presence_of :shop

validate :check_status, :on => :create

def check_status
  if first_name.present? && last_name.present? && shop.present?
    do stuff with first_name and last_name
    errors.add(:status, "you message here.") // if you need a error message
  end
end

For more information here custom validation . Hopefully it can help you