Validation and buildRules with custom condition

Need Help
1

Hello,

I have an API that calls cakePHP Rest Api. That api can’t handle “null” in an integer field (c#). Is it possible to modify validators and/or buildRules that way, that the “existsIn”-Check is only executed, when the value (here of “archive_id”) is greater than 0?

I tried many possibilities and read the cookbook, but had no luck with that task.

Please help me with the powerful validation of Cake.

Thank in advance!

2

This is how you can customize Data Validation, check this link.
https://book.cakephp.org/3.0/en/orm/validation.html#creating-a-rules-checker