• Sometimes called Transformation

• ORM/ODM

• DTOs

• Original .NET AutoMapper

• Mapping by Convention

• Opinionated

• Alleviate the boring tasks of mapping from Domain Models to DTOs/View Models

• Separation of Concerns

• Conventions over Configurations

Demo Time

• Dynamic Typings

• Weak Reflection

• Inconsistent metadata with different tsconfig

Demo Time

• @automapper monorepo with different packages

• @automapper utilizes plugin-based approach
  • classes plugin to work with TS/ES6 Classes
  • pojos plugin to work with plain objects + interfaces

• @automapper/nestjs is official NestJS integration

• Main target: TypeScript Node on the Server side (NestJS and others)

Mapper

Mapper

Mapping

• Contract between a Source and a Destination

• Within a Mapper, a Mapping is unidirectionally unique

• Contains all mapping configurations for all members

MappingProperty

• Each mapping configuration on Mapping is a MappingProperty

• Each MappingProperty contains the property name and its MappingTransformation

• "Auto" configuration vs Custom Configuration

MappingTransformation

• Instruction on how Mapper should map a MappingProperty

• Based on different TransformationType

TransformationType

• More to explore on Github and official documentations

• Github repo: https://github.com/nartc/mapper

• Documentations: https://automapperts.netlify.app

Demo