Fasterer yields "Calling argumentless methods within blocks is slower than using symbol to proc" within my validations. How to solve it?

Question

I am coding my own ERP. For the People (model class) I have the following validations:

class People < ApplicationRecord

  # some code for N:M relations

  # validations
  validates :aka, presence: { if: proc { |person| person.aka? } },
              uniqueness: true,
              length: { within: 3..25,
                        if: proc { |person| person.aka? } }
  validates :last_name, presence: { if: proc { |person| person.last_name? } },
                    uniqueness: { scope: %i[last_name first_name] },
                    length: { within: 2..100,
                              if: proc { |person| person.last_name? } }
  validates :phone_ext, presence: { if: proc { |person| person.phone_ext? } },
                               length: { within: 1..10,
                                         if: proc { |person| person.phone_ext? } },
                               format: { with: /\A\d{1,10}\Z/i,
                                         if: proc { |person| person.phone_ext? } }
  validates :first_name, presence: true,
                  uniqueness: { scope: %i[last_name first_name] },
                  length: { within: 2..100 }
end

As you can see in all the if: proc { .... lines, they are almost kind of the same stuff. And fasterer knows about it, that's why I am getting the Calling argumentless methods within blocks is slower than using symbol to proc message.

Now, unsuccessfully all day I have trying all day long to figure a way out to solve this Fasterer's message. I have tried lambdas, closures, &:, ->, so I give up.

Any ideas?

Answer 1

This is referring to, for example, a.map(&:foo) being faster than a.map { |o| o.foo }.

In this context, validates will take a method name to check as a symbol. For example, if: :aka? instead of if: proc { |person| person.aka? }