Set _id from another input field

[AaronPorts]

Is it possible to create a setter for the _id field to take a value from another input field (eg id ) when saving a new model? Something like Model.create({ id: a, key: value }) -> will create document { _id: a, key: value } .

[vkarpov15]

Yes, however you would have to add one yourself using something like the following:

schema.virtual('id').get(function() { return this._id; }).set(function(v){ this._id = v; return v; });

Mongoose briefly had a virtual like this between versions 7.4 and 8.0, but we had to remove it because the virtual caused too many hard-to-debug issues for existing codebases to enable it by default. But there's nothing stopping you from adding that to your codebase.