Custom validation of dependent fields

[emarkovskyi]

Issue type

I'm submitting a (check one): [ ] Bug report [] Feature request [ ] Regression (something that used to work, but stopped working in a newer version) [x ] Support request [x?] Documentation issue or request

Is it possible to implement some custom validation rule for dependent fields? so for example I want to check that some 'width' field is greater than or equal to 'height' field The idea to store this inside schema as a validation rule, and do not handle this by "onChanges" for example Txs!