restructure

providers/database/postgres/postgres.go

@@ -0,0 +1,40 @@
+package postgres
+
+import (
+	"log"
+
+	"github.com/rogeecn/atom/container"
+	"go.uber.org/dig"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	"gorm.io/gorm/schema"
+)
+
+func Provide(conf *Config, opts ...dig.ProvideOption) error {
+	return container.Container.Provide(func() (*gorm.DB, error) {
+		dbConfig := postgres.Config{
+			DSN: conf.DSN(), // DSN data source name
+		}
+		log.Println("PostgreSQL DSN: ", dbConfig.DSN)
+
+		gormConfig := gorm.Config{
+			NamingStrategy: schema.NamingStrategy{
+				TablePrefix:   conf.Prefix,
+				SingularTable: conf.Singular,
+			},
+			DisableForeignKeyConstraintWhenMigrating: true,
+		}
+
+		db, err := gorm.Open(postgres.New(dbConfig), &gormConfig)
+		if err != nil {
+			return nil, err
+		}
+
+		sqlDB, _ := db.DB()
+		sqlDB.SetMaxIdleConns(conf.MaxIdleConns)
+		sqlDB.SetMaxOpenConns(conf.MaxOpenConns)
+
+		return db, err
+	}, opts...)
+}