Created
May 24, 2024 20:02
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Go Migrations with embedded files
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package db | |
import ( | |
"embed" | |
"errors" | |
gokit_log "github.com/go-kit/log" | |
"github.com/go-kit/log/level" | |
"github.com/golang-migrate/migrate/v4" | |
"github.com/golang-migrate/migrate/v4/database/postgres" | |
_ "github.com/golang-migrate/migrate/v4/source/go_bindata" | |
"github.com/golang-migrate/migrate/v4/source/iofs" | |
_ "github.com/jackc/pgx/stdlib" | |
"github.com/jmoiron/sqlx" | |
) | |
//go:embed migrations/*.sql | |
var migrations embed.FS | |
type DB struct { | |
DB *sqlx.DB | |
} | |
func New(cfg Config, logger gokit_log.Logger) (*DB, error) { | |
self := &DB{ ... } | |
db, err := sqlx.Connect("pgx", cfg.DSN) | |
if err != nil { | |
return nil, err | |
} | |
self.DB = db | |
return self, nil | |
} | |
func (d *DB) Migrate() error { | |
migrationDriver, err := iofs.New(migrations, "migrations") | |
if err != nil { | |
return err | |
} | |
dbDriver, err := postgres.WithInstance(d.DB.DB, &postgres.Config{}) | |
if err != nil { | |
return err | |
} | |
m, err := migrate.NewWithInstance( | |
"iofs", | |
migrationDriver, | |
"postgres", | |
dbDriver, | |
) | |
if err != nil { | |
return err | |
} | |
level.Info(d.Cfg.Log).Log("msg", "running migrations") | |
if err := m.Up(); err != nil { | |
if errors.Is(err, migrate.ErrNoChange) { | |
return nil | |
} | |
return err | |
} | |
return nil | |
} |
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