Controlling the order of rails validations

Question

I have a rails model which has 7 numeric attributes filled in by the user via a form.

I need to validate the presence of each of these attributes which is obviously

Answer 1

I recall running into this issue quite some time ago, still unclear if validations order can be set and execution chain halted if a validation returns error.

I don't think Rails offers this option. It makes sense; we want to show all of the errors on the record (incl. those that come after a failing, due to invalid input, validation).

One possible approach is to validate only if the input to validate is present:

def within_required_range?
  return unless [:attribute1, attribute2, ..].all?(&:present?)

  # check the calculations and return true or false here
end

Make it pretty & better structured (single responsibility) with Rails idiomatic validation options:

validates :attribute1, :presence => true
validates :attribute2, :presence => true
# and so on through the attributes

validate :calculations_ok?, if: :attributes_present?

private
  def attributes_present?
    [:attribute1, attribute2, ..].all?(&:present?)
  end

  def calculations_ok?
    errors[:base] << "Not within required range" unless within_required_range?
  end

  def within_required_range?
    # check the calculations and return true or false here
  end