Cakephp: Add Validator::custom()

[nrother]

The Validator class has all kind of useful methods like Validator::boolean() as a shortcut for ->add(['field', 'name', ['rule' => 'boolean']]}). As far as I can see there is no such method for the "custom" rule that allows you to specify a custom regex. Is there a reason for this or was it merely missed? (Maybe Validator::regex might be a less confusing name.)

A more general approach might be to add a __call method to Validator that works for all the default rules automatically (just based on the name).

[markstory]

regex or pattern is probably a better name than custom.

[inoas]

👍 for regex() over custom() (pattern could be ... whatever, say an ICU pattern)

[cleptric]

PR is open