apply all getters (path and virtual getters)

apply virtual getters (can override getters option)

if options.virtuals = true, you can set options.aliases = false to skip applying aliases. This option is a no-op if options.virtuals = false.

remove empty objects (defaults to true)

if set, mongoose will call this function to allow you to transform the returned object

if true, replace any conventionally populated paths with the original id in the output. Has no affect on virtual populated paths.

if false, exclude the version key (__v by default) from the output

if true, convert Maps to POJOs. Useful if you want to JSON.stringify() the result of toObject().

If true, omits fields that are excluded in this document's projection. Unless you specified a projection, this will omit any field that has select: false in the schema.