Access Current Entry in Custom Validation Rule

Sometimes, when writing a custom validation rule for a Statamic project, I find myself in a position where I need information about the current entry I am editing.

But because validation rules don’t provide this kind of information I tried some hacky stuff like reading the current entry id from the request URL. But that doesn't work if you have more than two stacks open at once.

Luckily I discovered that Statamic did a nifty thing with their own validation …

access current don editing entry find information kind project request rules url validation writing