Is there a way to set onInvalid throw at the document level?

[phstc]

Is it possible to throw an error when trying to save an object with not defined attributes?

For example: if I define a schema only with firstName, then I try to save lastName, is there a way to cause it to raise an error? Currently, it is silently ignoring the any not defined value, but I would rather receive an error.

I tried (random attempt) to use onInvalid: 'throw', but it didn't work.

Object.defineProperties(Model.prototype, {
  [DynamoDbTable]: {
    value: 'table',
  },
  [DynamoDbSchema]: {
    onInvalid: 'throw',
    value: {
      hash: { type: 'String', keyType: 'Hash' },
      range: { type: 'String', keyType: 'Range' },
      firstName: { type: 'String' },
      data: {
        type: 'Document',
        members: dataSchema,
        onInvalid: 'throw'
      }
    }
  }
})

[jeskew]

Validation currently isn't supported by this library; errors will only be thrown when a value can't be converted to a DynamoDB type. onInvalid: 'throw' will only have an effect on types that rely on runtime type detection (such as Any, Collection, or Hash).

You could use a separate runtime validation library (like joi) or rely on a static type checker like TypeScript or Flow.

[phstc]

Hi @jeskew

I'm using joi already 😄 It would be great if DDB data-mapper could throw an error when trying to serialize something that is not defined. Currently, it just ignores what's not defined, which can be misleading.

[jeskew]

Understood. At the moment, the marshaller iterates over the properties defined on the schema rather than the properties defined on the object received so that the marshaller won't unknowingly invoke any getters or attempt to serialize methods.

[LucasBadico]

I build a model that merges dynamodb mapper schema and joi schema.
I write my schemas in this way:

const PhoneSchema = hasToBe => ({
  number: {
    type: 'String',
    validator: hasToBe.string().min(8).max(9).required()
  },
  areaCode: {
    type: 'String',
    validator: hasToBe.string().min(2).max(3).required()
  },
  kind: {
    type: 'String',
    validator: hasToBe.string()
  },
  countryCode: {
    type: 'String',
    validator: hasToBe.string().min(2).max(4)
  }
})

And inside my model it split it in joi and data-mapper schemas.
For now I have to call phone.validate() to try to apply the joi validation, I'm studing do this on the instantiation of the model itself.