GO DDD API

Create REST API with domain driven approach (DDD) using Golang, GORM (Object Relational Mapping), and MySQL.

Service Run

• Import docs/db.sql to mysql database
• Set project environment and run

# copy and rename config.exam.yaml
cp config.exam.yaml config.yaml

# set config.yaml
app:
  # app run port
  port: 8000
  pprof_port: 8090
  app_env: "local"
  app_debug: true
  app_name: "news"
  graceful_wait: 5s

# db config
db:
  user="your_db_username"
  password="your_db_password"
  host="your_db_host"
  port="your_db_port"
  dbname="your_db_name"

# run golang project
go run main.go

# API Endpoint : http://localhost:8000/api/v1/

Arch Design

• Application
  • Write business logic
    • news.go (GetNews, GetAllNews, &...)
    • topic.go (GetTopic, GetAllTopic, &...)
• Domain
  • Define interface
    • repository interface for infrastructure
  • Define struct
    • Entity struct that represent mapping to data model
      • news.go
      • topic.go
• Infrastructure
  • Implements repository interface
    • news_repository.go
    • topic_repository.go
• Interfaces
  • HTTP handler

Required Features

• Manajement news user can manage data news (CRUD)
• Manajement topic user can manage data topic (CRUD)
• Relational model betwean news & topic many to many (one news can contains multiple topic, one topic has multiple news)
• filter by news status filter news by it's status ['draft', 'deleted', 'publish']
• filter by news topic filter news by a topic (forinstance: politik)

URL ENDPOINT

/api/v1/news

• GET : Get all news
• POST : Create a news

/api/v1/news/{news_id}

• GET : Get a news by id
• PUT : Update a news by id
• DELETE : Delete a news by id

/api/v1/topic

• GET : Get all topic
• POST : Create a topic

/api/v1/topic/{news_id}

• GET : Get a topic by id
• PUT : Update a topic by id
• DELETE : Delete a topic by id

/api/v1/news?status={status}

• GET : Get all news filter by news.status

/api/v1/news/{topic-slug}

• GET : Get all news filter by topic

/api/v1/news?limit={limit}&page={page}

• GET : Get all news with pagination limit and page

Usage Examples

Get all news, URL GET /api/v1/news

curl --request GET \
  --url http://localhost:8000/api/v1/news

Get all news filter by status['draft', 'publish', 'deleted'], URL GET /api/v1/news?status={status}

curl --request GET \
  --url http://localhost:8000/api/v1/news?status=draft

Get all news filter by topic, URL GET /api/v1/news/{topic-slug}

curl --request GET \
  --url http://localhost:8000/api/v1/news/liputan-khusus

Get all news with pagination, URL GET /api/v1/news?limit={limit}&page={page}

curl --request GET \
  --url http://localhost:8000/api/v1/news?limit=2&page=1

Get all topics

curl --request GET \
  --url http://localhost:8000/api/v1/topic

Create a topic, URL POST /api/v1/topic

curl --request POST \
  --url http://localhost:8000/api/v1/topic \
  --header 'content-type: application/json' \
  --data '{
	"name":"Liputan Khusus",
	"slug":"liputan-khusus"
}'

Create a news, URL POST /api/v1/news

curl --request POST \
  --url http://localhost:8000/api/v1/news \
  --header 'content-type: application/json' \
  --data '{
	"title": "Triyana: TNI Razia Buku Upaya Desukarnoisasi",
	"slug": "memberangus-buku-memberangus-ilmu-1547439849539914993",
	"content": "30 November 1957, kunjungan Presiden Sukarno di Perguruan Cikini, Jakarta, atas undangan guru mendadak jadi tragedi. Hujan granat mendarat ketika ia berjalan keluar dari sekolah dua anaknya itu, Megawati Soekarnoputri dan Guruh Soekarnoputra. Dua pengawal, Oding Suhendar dan Sudiyo, merangkul Sukarno pergi menyelamatkan diri. Kedua anak Sukarno sudah lebih dulu diamankan.",
	"status": "publish",
	"topic": [
		{
			"id": 1,
			"created_at": "2019-01-19T03:12:32Z",
			"updated_at": "2019-01-19T03:12:32Z",
			"deleted_at": null,
			"name": "Liputan Khusus",
			"slug": "liputan-khusus",
			"News": null
		}
	]
}'

Delete a news, URL DELETE /api/v1/news/2

curl --request DELETE \
  --url http://localhost:8000/api/v1/news/2

Delete a topic, URL DELETE /api/v1/topic/2

curl --request DELETE \
  --url http://localhost:8000/api/v1/topic/3

Update a news, URL PUT /api/v1/news/2

curl --request PUT \
  --url http://localhost:8000/api/v1/news/2 \
  --header 'content-type: application/json' \
  --data '{
	"title": "[draft] Memberangus Buku, Memberangus Ilmu",
	"slug": "1memberangus-buku-memberangus-ilmu-1547439849539914993",
	"content": "yang disita itu berjudul Kronik ‘65: Catatan Hari Per Hari Peristiwa G30S Sebelum dan Sesudahnya, Jasmerah: Pidato-pidato Spektakuler Bung Karno Sepanjang Massa, dan Mengincar Bung Besar: Tujuh Upaya Pembunuhan Bung Karno. Tak ada satu pun judul buku yang memuat kata “PKI” atau “komunis” seperti yang dituduhkan",
	"status": "draft",
	"topic": [
		{
			"id": 2,
			"created_at": "2019-01-19T03:12:32Z",
			"updated_at": "2023-01-19T03:12:32Z",
			"deleted_at": null,
			"name": "Liputan Khusus1",
			"slug": "liputan-khusus2",
			"News": null
		}
	]
}'

Update a topic, URL PUT /api/v1/topic/2

curl --request PUT \
  --url http://localhost:8000/api/v1/topic/2 \
  --header 'content-type: application/json' \
  --data '{
	"name":"Sepak Bola Nasional",
	"slug":"sepak-bola-national"
}'

prometheus metrics and pprof

• http://localhost:8090/metrics
• http://localhost:8090/debug/pprof/

Product Items Backlog

• Mandatory: Create REST API News & Topic CRUD
  • News
    • Get all
    • Get by id
    • Create
    • Update
    • Delete
  • Topic
    • Get all topic
    • Get by id
    • Create
    • Update
    • Delete
• Mandatory: Create Filter
  • Filter by status news
  • Filter by topic
• Mandatory: API Functional Test
• Opsional: Deploy to (heroku/aws/azure/digital ocean)
• Opsional: Database setup migration schema DB

logger

you can see the https://github.com/go-god/logger

References & Library

• go-god: https://github.com/go-god
• DDD Skeleton : https://github.com/takashabe/go-ddd-sample
• gin: https://github.com/gin-gonic/gin 1.9.0
• GORM Documentation : http://doc.gorm.io
• GORM Pagination Extension : https://github.com/biezhi/gorm-paginator
• Viper : https://github.com/spf13/viper
• Deploy GoApp on GCP GAE https://medium.com/google-cloud/deploying-your-go-app-on-google-app-engine-5f4a5c2a837