feat: migrated prisma -> gorm

adapters/secondary/gateways/articleRepository.go

@@ -1,77 +1,57 @@
 package gateways
 
 import (
-	"GohCMS2/db"
+	entity "GohCMS2/adapters/secondary/gateways/models"
-	. "GohCMS2/domain/article"
+	domain "GohCMS2/domain/article"
 	. "GohCMS2/domain/gateways"
-	"context"
+	"gorm.io/gorm"
 )
 
 type ArticleRepository struct {
-	client *db.PrismaClient
+	db *gorm.DB
 }
 
-func NewArticleRepository() *ArticleRepository {
+func NewArticleRepository(db *gorm.DB) *ArticleRepository {
-	a := ArticleRepository{
+	a := ArticleRepository{db}
-		client: db.NewClient(),
-	}
 	return &a
 }
 
-func (a *ArticleRepository) connectClient() {
+func (a *ArticleRepository) Get(id uint32) (domain.Article, error) {
-	err := a.client.Connect()
+	var article domain.Article
+	err := a.db.Model(&entity.Article{}).First(&article, id).Error
 	if err != nil {
-		panic(err)
+		return article, err
-	}
 	}
 
-func (a *ArticleRepository) disconnectClient() {
+	return domain.FromDb(article.ID, article.Title, article.Body, article.CreatedAt, article.UpdatedAt), nil
-	err := a.client.Disconnect()
+}
+
+func (a *ArticleRepository) Create(article domain.Article) (domain.Article, error) {
+	creationResult := a.db.Create(&entity.Article{
+		Title: article.Title,
+		Body:  article.Body,
+	})
+	if creationResult.Error != nil {
+		return domain.Article{}, creationResult.Error
+	}
+
+	var createdArticle entity.Article
+	creationResult.Scan(&createdArticle)
+
+	return domain.FromDb(
+			createdArticle.ID,
+			createdArticle.Title,
+			createdArticle.Body,
+			createdArticle.CreatedAt,
+			createdArticle.UpdatedAt),
+		nil
+}
+
+func (a *ArticleRepository) GetAll() []domain.Article {
+	var articles []domain.Article
+	err := a.db.Model(&entity.Article{}).Find(&articles).Error
 	if err != nil {
-		panic(err)
+		return []domain.Article{}
-	}
-	a.client = db.NewClient()
-}
-
-func (a *ArticleRepository) Get(id int) Article {
-	a.connectClient()
-	defer a.disconnectClient()
-
-	article, err := a.client.Article.FindUnique(db.Article.ID.Equals(id)).Exec(context.Background())
-	if err != nil {
-		panic(err)
-	}
-
-	return FromDb(article.ID, article.Title, article.Body, article.CreatedAt.String(), article.UpdatedAt.String())
-}
-
-func (a *ArticleRepository) Create(article Article) Article {
-	a.connectClient()
-	defer a.disconnectClient()
-
-	articleDb, err := a.client.Article.CreateOne(
-		db.Article.Title.Set(article.Title),
-		db.Article.Body.Set(article.Body),
-	).Exec(context.Background())
-	if err != nil {
-		panic(err)
-	}
-
-	return FromDb(articleDb.ID, articleDb.Title, articleDb.Body, articleDb.CreatedAt.String(), articleDb.UpdatedAt.String())
-}
-
-func (a *ArticleRepository) GetAll() []Article {
-	a.connectClient()
-	defer a.disconnectClient()
-
-	articlesDb, err := a.client.Article.FindMany().Exec(context.Background())
-	if err != nil {
-		panic(err)
-	}
-
-	var articles []Article
-	for _, articleDb := range articlesDb {
-		articles = append(articles, FromDb(articleDb.ID, articleDb.Title, articleDb.Body, articleDb.CreatedAt.String(), articleDb.UpdatedAt.String()))
 	}
 
 	return articles

adapters/secondary/gateways/models/article.go

@@ -0,0 +1,15 @@
+package models
+
+import (
+	"gorm.io/gorm"
+	"time"
+)
+
+type Article struct {
+	gorm.Model
+	ID        uint32 `gorm:"primary_key;auto_increment;not_null"`
+	Title     string
+	Body      string
+	CreatedAt time.Time `gorm:"autoCreateTime"`
+	UpdatedAt time.Time `gorm:"autoUpdateTime"`
+}

api/article.go

@@ -10,19 +10,19 @@ import (
 )
 
 func getArticle(w http.ResponseWriter, r *http.Request) {
-	id, err := strconv.Atoi(chi.URLParam(r, "id"))
+	id, err := strconv.ParseUint(chi.URLParam(r, "id"), 10, 32)
 	if err != nil {
-		http.Error(w, err.Error(), http.StatusNotFound)
+		http.Error(w, "The server expects the ID to be in the format of an unsigned 32-bit integer (uint32).", http.StatusBadRequest)
 		return
 	}
 
-	article := container.GetArticleUseCase.GetArticle(id)
+	article, err := container.GetArticleUseCase.GetArticle(uint32(id))
-	articleJson, err := json.Marshal(article)
 	if err != nil {
-		http.Error(w, err.Error(), http.StatusNotFound)
+		http.Error(w, "The requested resource, identified by its unique ID, could not be found on the server.", http.StatusNotFound)
 		return
 	}
 
+	articleJson, _ := json.Marshal(article)
 	_, _ = w.Write(articleJson)
 }
 
@@ -30,14 +30,18 @@ func postArticle(w http.ResponseWriter, r *http.Request) {
 	var article Article
 	err := json.NewDecoder(r.Body).Decode(&article)
 	if err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
+		http.Error(w, "The request cannot be processed due to a mismatch in the format of the body.", http.StatusBadRequest)
 		return
 	}
 
-	createdArticle := container.CreateArticleUseCase.CreateAarticle(CreateArticleCommand{
+	createdArticle, err := container.CreateArticleUseCase.CreateArticle(CreateArticleCommand{
 		Title: article.Title,
 		Body:  article.Body,
 	})
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
 	articleJson, _ := json.Marshal(createdArticle)
 
 	_, _ = w.Write(articleJson)

api/dependecyInjection.go

@@ -1,8 +1,11 @@
 package api
 
 import (
+	"GohCMS2/adapters/secondary/gateways/models"
 	. "GohCMS2/useCases"
+	"github.com/glebarez/sqlite"
 	"go.uber.org/dig"
+	"gorm.io/gorm"
 )
 
 type Container struct {
@@ -13,7 +16,7 @@ type Container struct {
 
 var container *Container
 
-func createContainer(
+func setContainer(
 	createArticle *CreateArticleUseCase,
 	getArticle *GetArticleUseCase,
 	listArticle *ListArticlesUseCase,
@@ -33,9 +36,17 @@ func InitContainer() {
 
 	digContainer := dig.New()
 
-	_ = digContainer.Provide(NewCreateArticleUseCase)
+	db, err := gorm.Open(sqlite.Open("test.db"), &gorm.Config{})
-	_ = digContainer.Provide(NewGetArticleUseCase)
+	if err != nil {
-	_ = digContainer.Provide(NewListArticlesUseCase)
+		panic(err)
+	}
+	_ = db.AutoMigrate(&models.Article{})
 
-	_ = digContainer.Invoke(createContainer)
+	_ = digContainer.Provide(func() *gorm.DB { return db })
+
+	_ = digContainer.Provide(func(db *gorm.DB) *CreateArticleUseCase { return NewCreateArticleUseCase(db) })
+	_ = digContainer.Provide(func(db *gorm.DB) *GetArticleUseCase { return NewGetArticleUseCase(db) })
+	_ = digContainer.Provide(func(db *gorm.DB) *ListArticlesUseCase { return NewListArticlesUseCase(db) })
+
+	_ = digContainer.Invoke(setContainer)
 }

cmd/main.go

@@ -9,6 +9,13 @@ import (
 	"net/http"
 )
 
+func jsonContentTypeMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		next.ServeHTTP(w, r)
+	})
+}
+
 func main() {
 	api.InitContainer()
 
@@ -21,6 +28,7 @@ func main() {
 
 	apiRouter := chi.NewRouter()
 	apiRouter.Use(httplog.RequestLogger(httplog.NewLogger("GohCMS2")))
+	apiRouter.Use(jsonContentTypeMiddleware)
 	apiRouter.Mount("/v1", r)
 
 	fmt.Println("Server starting on port 8080")

db/.gitignore

@@ -1,2 +0,0 @@
-# gitignore generated by Prisma Client Go. DO NOT EDIT.
-*_gen.go

domain/article/article.go

@@ -1,11 +1,13 @@
 package article
 
+import "time"
+
 type Article struct {
-	Id        int    `json:"id"`
+	ID        uint32    `json:"id"`
 	Title     string    `json:"title"`
 	Body      string    `json:"body"`
-	CreatedAt string `json:"created_at"`
+	CreatedAt time.Time `json:"created_at"`
-	UpdatedAt string `json:"updated_at"`
+	UpdatedAt time.Time `json:"updated_at"`
 }
 
 func FromApi(
@@ -19,14 +21,14 @@ func FromApi(
 }
 
 func FromDb(
-	id int,
+	id uint32,
 	title string,
 	body string,
-	createdAt string,
+	createdAt time.Time,
-	updatedAt string,
+	updatedAt time.Time,
 ) Article {
 	return Article{
-		Id:        id,
+		ID:        id,
 		Title:     title,
 		Body:      body,
 		CreatedAt: createdAt,

domain/gateways/IArticleRepository.go

@@ -5,7 +5,7 @@ import (
 )
 
 type IArticleRepository interface {
-	Get(id int) Article
+	Get(id uint32) (Article, error)
 	GetAll() []Article
-	Create(article Article) Article
+	Create(article Article) (Article, error)
 }

go.mod

@@ -3,17 +3,23 @@ module GohCMS2
 go 1.20
 
 require (
-	github.com/iancoleman/strcase v0.0.0-20190422225806-e506e3ef7365
+	github.com/glebarez/sqlite v1.9.0
-	github.com/joho/godotenv v1.5.1
+	github.com/go-chi/httplog v0.3.1
-	github.com/shopspring/decimal v1.3.1
+	go.uber.org/dig v1.17.0
-	github.com/steebchen/prisma-client-go v0.21.0
+	gorm.io/gorm v1.25.2
-	github.com/takuoki/gocase v1.0.0
-	golang.org/x/text v0.10.0
 )
 
 require (
-	github.com/go-chi/httplog v0.3.1
+	github.com/dustin/go-humanize v1.0.1 // indirect
-	go.uber.org/dig v1.17.0
+	github.com/glebarez/go-sqlite v1.21.2 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	modernc.org/libc v1.24.1 // indirect
+	modernc.org/mathutil v1.5.0 // indirect
+	modernc.org/memory v1.6.0 // indirect
+	modernc.org/sqlite v1.25.0 // indirect
 )
 
 require (

go.sum

@@ -1,17 +1,24 @@
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/glebarez/go-sqlite v1.21.2 h1:3a6LFC4sKahUunAmynQKLZceZCOzUthkRkEAl9gAXWo=
+github.com/glebarez/go-sqlite v1.21.2/go.mod h1:sfxdZyhQjTM2Wry3gVYWaW072Ri1WMdWJi0k6+3382k=
+github.com/glebarez/sqlite v1.9.0 h1:Aj6bPA12ZEx5GbSF6XADmCkYXlljPNUY+Zf1EQxynXs=
+github.com/glebarez/sqlite v1.9.0/go.mod h1:YBYCoyupOao60lzp1MVBLEjZfgkq0tdB1voAQ09K9zw=
 github.com/go-chi/chi/v5 v5.0.7/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
 github.com/go-chi/chi/v5 v5.0.10 h1:rLz5avzKpjqxrYwXNfmjkrYYXOyLJd37pz53UFHC6vk=
 github.com/go-chi/chi/v5 v5.0.10/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
 github.com/go-chi/httplog v0.3.1 h1:uC3IUWCZagtbCinb3ypFh36SEcgd6StWw2Bu0XSXRtg=
 github.com/go-chi/httplog v0.3.1/go.mod h1:UoiQQ/MTZH5V6JbNB2FzF0DynTh5okpXxlhsyxoP5m8=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
-github.com/iancoleman/strcase v0.0.0-20190422225806-e506e3ef7365 h1:ECW73yc9MY7935nNYXUkK7Dz17YuSUI9yqRqYS8aBww=
+github.com/google/pprof v0.0.0-20221118152302-e6195bd50e26 h1:Xim43kblpZXfIBQsbuBVKCudVG457BR2GZFIz3uw3hQ=
-github.com/iancoleman/strcase v0.0.0-20190422225806-e506e3ef7365/go.mod h1:SK73tn/9oHe+/Y0h39VT4UCxmurVJkR5NA7kMEAOgSE=
+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
-github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
 github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
@@ -21,64 +28,29 @@ github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APP
 github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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-github.com/steebchen/prisma-client-go v0.21.0 h1:mWBW4eDbKKdLJ8ET2kj0U8myDIVEPuZFRT7En7Yf7YU=
-github.com/steebchen/prisma-client-go v0.21.0/go.mod h1:3VhO5OCbQEAUH64bm15HobZMBVqgU93T/uIVRN0+wrM=
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-golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.10.0 h1:UpjohKhiEgNc0CSauXmwYftY1+LlaC75SJwh0SgCX58=
-golang.org/x/text v0.10.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
-golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
-golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/gorm v1.25.2 h1:gs1o6Vsa+oVKG/a9ElL3XgyGfghFfkKA2SInQaCyMho=
+gorm.io/gorm v1.25.2/go.mod h1:L4uxeKpfBml98NYqVqwAdmV1a2nBtAec/cf3fpucW/k=
+modernc.org/libc v1.24.1 h1:uvJSeCKL/AgzBo2yYIPPTy82v21KgGnizcGYfBHaNuM=
+modernc.org/libc v1.24.1/go.mod h1:FmfO1RLrU3MHJfyi9eYYmZBfi/R+tqZ6+hQ3yQQUkak=
+modernc.org/mathutil v1.5.0 h1:rV0Ko/6SfM+8G+yKiyI830l3Wuz1zRutdslNoQ0kfiQ=
+modernc.org/mathutil v1.5.0/go.mod h1:mZW8CKdRPY1v87qxC/wUdX5O1qDzXMP5TH3wjfpga6E=
+modernc.org/memory v1.6.0 h1:i6mzavxrE9a30whzMfwf7XWVODx2r5OYXvU46cirX7o=
+modernc.org/memory v1.6.0/go.mod h1:PkUhL0Mugw21sHPeskwZW4D6VscE/GQJOnIpCnW6pSU=
+modernc.org/sqlite v1.25.0 h1:AFweiwPNd/b3BoKnBOfFm+Y260guGMF+0UFk0savqeA=
+modernc.org/sqlite v1.25.0/go.mod h1:FL3pVXie73rg3Rii6V/u5BoHlSoyeZeIgKZEgHARyCU=

schema.prisma

@@ -1,16 +0,0 @@
-datasource db {
-  provider = "sqlite"
-  url      = "file:dev.db"
-}
-
-generator db {
-  provider = "go run github.com/steebchen/prisma-client-go"
-}
-
-model Article {
-  id        Int      @id @default(autoincrement())
-  title     String
-  body      String
-  createdAt DateTime @default(now())
-  updatedAt DateTime @updatedAt
-}

useCases/CreateArticleUseCase.go

@@ -3,6 +3,7 @@ package useCases
 import (
 	. "GohCMS2/adapters/secondary/gateways"
 	. "GohCMS2/domain/article"
+	"gorm.io/gorm"
 )
 
 type CreateArticleUseCase struct {
@@ -14,12 +15,12 @@ type CreateArticleCommand struct {
 	Body  string
 }
 
-func NewCreateArticleUseCase() *CreateArticleUseCase {
+func NewCreateArticleUseCase(db *gorm.DB) *CreateArticleUseCase {
 	return &CreateArticleUseCase{
-		articleRepository: *NewArticleRepository(),
+		articleRepository: *NewArticleRepository(db),
 	}
 }
 
-func (g *CreateArticleUseCase) CreateAarticle(article CreateArticleCommand) Article {
+func (g *CreateArticleUseCase) CreateArticle(article CreateArticleCommand) (Article, error) {
 	return g.articleRepository.Create(FromApi(article.Title, article.Body))
 }

useCases/GetArticleUseCase.go

@@ -3,18 +3,19 @@ package useCases
 import (
 	. "GohCMS2/adapters/secondary/gateways"
 	. "GohCMS2/domain/article"
+	"gorm.io/gorm"
 )
 
 type GetArticleUseCase struct {
 	articleRepository ArticleRepository
 }
 
-func NewGetArticleUseCase() *GetArticleUseCase {
+func NewGetArticleUseCase(db *gorm.DB) *GetArticleUseCase {
 	return &GetArticleUseCase{
-		articleRepository: *NewArticleRepository(),
+		articleRepository: *NewArticleRepository(db),
 	}
 }
 
-func (g *GetArticleUseCase) GetArticle(id int) Article {
+func (g *GetArticleUseCase) GetArticle(id uint32) (Article, error) {
 	return g.articleRepository.Get(id)
 }

useCases/ListArticlesUseCase.go

@@ -3,15 +3,16 @@ package useCases
 import (
 	. "GohCMS2/adapters/secondary/gateways"
 	. "GohCMS2/domain/article"
+	"gorm.io/gorm"
 )
 
 type ListArticlesUseCase struct {
 	articleRepository ArticleRepository
 }
 
-func NewListArticlesUseCase() *ListArticlesUseCase {
+func NewListArticlesUseCase(db *gorm.DB) *ListArticlesUseCase {
 	return &ListArticlesUseCase{
-		articleRepository: *NewArticleRepository(),
+		articleRepository: *NewArticleRepository(db),
 	}
 }