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database_migrate.go
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database_migrate.go
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package db
import (
"database/sql"
"fmt"
"log"
"os"
_ "github.com/go-sql-driver/mysql"
"github.com/golang-migrate/migrate"
"github.com/golang-migrate/migrate/database/mysql"
_ "github.com/golang-migrate/migrate/source/file"
)
// func CreateDatabase() (*sql.DB, error) {
// serverName := "localhost:3306"
// user := "myuser"
// password := "pw"
// dbName := "demo"
// connectionString := fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&collation=utf8mb4_unicode_ci&parseTime=true&multiStatements=true", user, serverName, dbName)
// db, err := sql.Open("mysql", connectionString)
// if err != nil {
// return nil, err
// }
// if err := migrateDatabase(db); err != nil {
// return db, err
// }
// return db, nil
// }
func migrateDatabase(db *sql.DB) error {
driver, err := mysql.WithInstance(db, &mysql.Config{})
if err != nil {
return err
}
dir, err := os.Getwd()
if err != nil {
log.Fatal(err)
}
migration, err := migrate.NewWithDatabaseInstance(
fmt.Sprintf("file://%s/db/migrations", dir),
"mysql",
driver,
)
if err != nil {
return err
}
migration.Log = &MigrationLogger{}
migration.Log.Printf("Applying database migrations")
err = migration.Up()
if err != nil && err != migrate.ErrNoChange {
return err
}
version, _, err := migration.Version()
if err != nil {
return err
}
migration.Log.Printf("Active database version: %d", version)
return nil
}