Entity types too strict

[sam-goodwin]

This doesn't work:

export interface StringType {
  type: string;
}

const foo = entity("Foo", {
  partition: ["pk"],
  attributes: {
    pk: z.string(),
    broken: null as any as z.ZodType<StringType>
  }
});

Type 'JSONSchemaType' is not assignable to type 'ZodType<AttributeValue, ZodTypeDef, AttributeValue>'.
  Types of property '_type' are incompatible.
    Type 'StringType' is not assignable to type 'AttributeValue'.
      Type 'StringType' is not assignable to type 'Attributes'.
        Index signature for type 'string' is missing in type 'StringType'.ts(2322)

But this does:

broken: null as any as z.ZodType<{type: string}>

[thantos]

The type error is by design in typescript. interfaces without a index signature cannot be used as a type that does (ex: Attribute). And the Attribute/AttributeValue type is trying to limit property types to match what dynamo can handle.

Plus the code sample here is a hack that would break if said field was used as a key or we ever generate jsonschema/openai for entities.

Options:

1. close as by design
2. change AttributeValue to any and do not type check the definition of the entity attributes.