Documentation does not talk about resourceId in class validation rules

[cweiske]

• Nova Version: 4 + 5

Description:

There is no documentation about using the resourceId in custom update validation rules.

Neither v4 nor v5 docs talk about this:

• https://nova.laravel.com/docs/v4/resources/validation#update-rules
• https://nova.laravel.com/docs/v5/resources/validation#update-rules

There is the closed ticket #749 in this issue tracker which has a hint, but no official documentation.