“Data mapper pattern”的意思、由来-开放百科全书

词条

Data mapper pattern

释义

Implementations
Java/.NET Node.js / TypeScript PHP Python Ruby Elixir Golang
See also
References

In software engineering, the data mapper pattern is an architectural pattern. It was named by Martin Fowler in his 2003 book Patterns of Enterprise Application Architecture.^[1] The interface of an object conforming to this pattern would include functions such as Create, Read, Update, and Delete, that operate on objects that represent domain entity types in a data store.

A Data Mapper is a Data Access Layer that performs bidirectional transfer of data between a persistent data store (often a relational database) and an in-memory data representation (the domain layer). The goal of the pattern is to keep the in-memory representation and the persistent data store independent of each other and the data mapper itself. The layer is composed of one or more mappers (or Data Access Objects), performing the data transfer. Mapper implementations vary in scope. Generic mappers will handle many different domain entity types, dedicated mappers will handle one or a few.

Implementations

Implementations of the concept can be found in various frameworks for many programming environments.

Java/.NET

MyBatis persistence framework
Hibernate (NHibernate) persistence framework

Node.js / TypeScript

Bookshelf.js library
[https://typeorm.github.io/ TypeORM] library
[https://dmfay.github.io/massive-js/ Massive.js] library
[https://www.prisma.io/ Prisma]

PHP

Atlas ORM (data mapper, table data gateway, query builder, and PDO wrapper)^[2]
Doctrine2 Object Relational Mapper (ORM) and the Database Abstraction Layer^[3]

Python

SQLAlchemy library

Ruby

DataMapper library (Actually this library implemented the Active Record design pattern, its successor, DataMapper 2 (now ROM) aimed to actually implement the design pattern it was named after)

Elixir

[https://github.com/elixir-ecto/ecto Ecto] persistence framework

Golang

[https://www.prisma.io/ Prisma]

References

1. ^{{cite book |last=Fowler |first=Martin |title=Patterns of enterprise application architecture |publisher=Addison-Wesley |year=2003 |isbn=978-0-321-12742-6 |url=https://books.google.com/books?id=FyWZt5DdvFkC&lpg=PA1&dq=Patterns%20of%20Enterprise%20Application%20Architecture%20by%20Martin%20Fowler&pg=PT187#v=onepage&q=active%20record&f=false }}
2. ^{{cite web|url=http://atlasphp.io/|title=Atlas ORM{{spaced ndash |archiveurl=http://atlasphp.io}} Atlas}}
3. ^{{cite web|url=http://www.doctrine-project.org/blog/your-own-orm-doctrine2.html#doctrine2-and-activerecord|title=Doctrine2 and ActiveRecord{{spaced ndash |archiveurl=http://www.doctrine-project.org/blog/your-own-orm-doctrine2.html#doctrine2-and-activerecord}} Doctrine2|publisher=Doctrine2}}

1 : Software design patterns

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