How to filter JSON objects according to "schema"

I build a RESTful api with node.js and express / koa.

I want to filter the JSON data input - for security reasons as well to have only the needed business specific properties. After filtering the business-specific validation takes place.

How can I throw away unwanted JSON / JS object properties - i.e. properties not in my database schema as well as empty properties?

• Define Schema & filter according to this? Using e.g. http://ift.tt/1I4G42a


• Any configurable filtering available?