Support adding default auto generated attributes on all entities

[owain68]

I can see updatedAt but I invariably add createdAt for my entities. I cannot see this in the code. Something like this.

  put: async (putItem: DocumentClient.PutItemInput) => {
    const dateCreated = new Date().toISOString()
    const creationAttributes = { createdAt: dateCreated, updatedAt: dateCreated }
    const mergedPutItemWithCreationAttributes = { ...creationAttributes, ...putItem.Item }

Would be nice to be able to do this simply on the entity annotation too.

[whimzyLive]

@owain68
Hi, you can already achieve this today by leveraging entity inheritance.

// Create a base entity with all the attributes you normally have
abstract class BaseEntity {
  @AutoGenerateAttribute({
    strategy: AUTO_GENERATE_ATTRIBUTE_STRATEGY.ISO_DATE
  })
  createdAt: string
} 

// Create other entities from the base entity
class User extends BaseEntity {
  @AutoGenerateAttribute({
    strategy: AUTO_GENERATE_ATTRIBUTE_STRATEGY.UUID4
  })
  id: string
}