mongoose-schema-extend

Adds schema inheritance and discriminator key support to Mongoose schemas, enabling model hierarchies stored in a single collection. Version 0.2.2 is the latest stable release (last updated 2014). Requires Harmony proxies (--harmony_proxies flag) since 0.2.1. Distinguished by its simple extend() method and automatic discriminator key population for polymorphic queries. Alternatives like mongoose's built-in discriminators are more stable and don't require special flags.