Chaining getter on virtual doesn't work with lean about mongoose-lean-virtuals HOT 4 CLOSED

What error do you get? I notice you're using typescript, is this a compiler error or a runtime error?

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it's a runtime error. as i wrote we get the error, that "instances" is undefined in the .get method body

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Try adding justOne: false?

AnnotationTypeSchema.virtual('instances', {
    ref: AnnotationType.name,
    localField: 'classToAnnotate',
    foreignField: 'classToAnnotate',
    match: { textField: { $exists: true } },
    justOne: false // <-- add this
}).get((instances: BaseAnnotationType[]) => instances.map(instance => instance.textField));

from mongoose-lean-virtuals.

So we had another point where we needed this and it seemed to work. Don't know if it's because of the justOne option, but it works i will close this issue.

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