Missing Multiple Field Validation Hook (Schema Validation)

Hi everybody. I have previous experience using other validation libraries and in all of them I have a hook to put my code where I want validate multiple fields. This hook is executed after successful validation of all individual fields. I know that is possible achieve the same using mongoose, but I end up executing the same field validation for each field dependency. E.g. field2 validation depends on field1 and field3 depends on field1. Did you see? field1 validation executed two times.

After search a lot, my only solution to avoid this was override schema.methods.validate, inside it call validate and then put my multiple field validation code. To improve this, I plan do a monkey patch on mongoose.Document.prototype.validate.

There is another solution for this? Please tell me.

[pedro-net]

I just found a way to workaround this issue: Create a method schema.validateTogether and put there multi-field validation code, then create another method schema.validateAll that calls schema.validate and schema.validateTogether. Then schema.pre('save') calls schema.validateTogether. If I want validate data, instead schema.validate I do schema.validateAll. Yeah, that’s it.

[vkarpov15]

That’s a good workaround 👍