Created
June 14, 2024 06:42
-
-
Save IamNator/f1e9e6b1ae4d9e3eb66c73998f545f6c to your computer and use it in GitHub Desktop.
Clean Database Transactions in Go with GORM
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package main | |
| import ( | |
| "context" | |
| "fmt" | |
| "gorm.io/driver/sqlite" | |
| "gorm.io/gorm" | |
| ) | |
| // Entity represents a database entity | |
| type Entity struct { | |
| ID uint | |
| Name string | |
| } | |
| // Repository defines the methods for database operations and transaction handling | |
| type Repository interface { | |
| Create(ctx context.Context, entity *Entity) error | |
| Update(ctx context.Context, entity *Entity) error | |
| Transaction(ctx context.Context, fn func(repo Repository) error) error | |
| } | |
| // repository implements the Repository interface and holds the GORM DB instance | |
| type repository struct { | |
| db *gorm.DB | |
| } | |
| // withTx creates a new repository instance with the given transaction | |
| func (r *repository) withTx(tx *gorm.DB) Repository { | |
| return &repository{ | |
| db: tx, | |
| } | |
| } | |
| // Transaction manages the transaction lifecycle | |
| func (r *repository) Transaction(ctx context.Context, fn func(repo Repository) error) error { | |
| tx := r.db.Begin() | |
| if tx.Error != nil { | |
| return tx.Error | |
| } | |
| repo := r.withTx(tx) | |
| err := fn(repo) | |
| if err != nil { | |
| tx.Rollback() | |
| return err | |
| } | |
| return tx.Commit().Error | |
| } | |
| // Create adds a new entity to the database | |
| func (r *repository) Create(ctx context.Context, entity *Entity) error { | |
| return r.db.Create(entity).Error | |
| } | |
| // Update modifies an existing entity in the database | |
| func (r *repository) Update(ctx context.Context, entity *Entity) error { | |
| return r.db.Save(entity).Error | |
| } | |
| // Service handles the business logic | |
| type Service struct { | |
| repo Repository | |
| } | |
| // PerformBusinessLogic performs multiple database operations within a transaction | |
| func (s *Service) PerformBusinessLogic(ctx context.Context) error { | |
| return s.repo.Transaction(ctx, func(repo Repository) error { | |
| if err := repo.Create(ctx, &Entity{Name: "Example"}); err != nil { | |
| return err | |
| } | |
| return repo.Update(ctx, &Entity{ID: 1, Name: "Updated Example"}) | |
| }) | |
| } | |
| func main() { | |
| db, err := gorm.Open(sqlite.Open("test.db"), &gorm.Config{}) | |
| if err != nil { | |
| panic("failed to connect database") | |
| } | |
| // Migrate the schema | |
| db.AutoMigrate(&Entity{}) | |
| repo := &repository{db: db} | |
| service := &Service{repo: repo} | |
| ctx := context.Background() | |
| if err := service.PerformBusinessLogic(ctx); err != nil { | |
| fmt.Printf("Transaction failed: %v\n", err) | |
| } else { | |
| fmt.Println("Transaction succeeded") | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment