code: function formatDate (payload, schema) {
    _.forEach(schema, function(v, k) {
      if (v !== null && v._type === 'date') {
        if (payload[k] !== null) {
          payload[k] = new Date(payload[k])
        }
      }
    })
  }
docs: Applies simple to-date conversion for every date property of a payload, as defined in the schema provided.