feat(document): validateUpdatedOnly option. only validates modified

[captaincaius]

schema option that can be overridden on validate, validateSync, and save

Summary

#7421 - ignore validation on unmodified paths

Abandoned yucky post-filtering approach in #7483.

• Still unresolved: feat(document): validateUpdatedOnly option. ignores valid on unmodified #7483 (comment) - are you sure I should add it?

Examples

see tests ;)

[captaincaius]

FYI for some reason I didn't see the problem I had with the hooks the first time I tried it "the right way". I probably just had a mistake, but if anything pops into your head that I should check, LMK.

[captaincaius]

Cool beans. Is there anything else you'd like done differently or added? Any other tests perhaps?

[vkarpov15]

Nope this looks solid enough to merge into the 5.5 branch. Since this is a new feature, it'll be released with 5.5.0 sometime in March 2019.

[exentrich]

Unfortunately this option doesn't work. And I can't find documentation for this feature.

I have this schema and options:

const Schema = mongoose.Schema({
  title: String,
  coverId: Number
}, {
  validateModifiedOnly: true
}

//pre('validate'...
this.isModified('coverId') //false
this.coverId //NaN
this.isModified('title') //true

When I try to update existing document title field, it fails because coverId field value is NaN (invalid). My use-case to ignore such validations.

Can you please help? Maybe I do something wrong.