daddy/cmd/server/migration.go
William Petit 591112a800 Intégration d'un point d'entrée GraphQL et d'un connecteur pour
PostgreSQL

- Possibilité de migrer le schéma de la base de données via drapeau
- Génération du code GraphQL avec https://gqlgen.com/
2020-07-13 09:20:14 +02:00

101 lines
2.0 KiB
Go

package main
import (
"context"
"forge.cadoles.com/Cadoles/daddy/internal/database"
"forge.cadoles.com/Cadoles/daddy/internal/migration"
"github.com/jackc/pgx/v4"
"github.com/pkg/errors"
"gitlab.com/wpetit/goweb/logger"
"gitlab.com/wpetit/goweb/service"
)
const (
migrateUp = "up"
migrateLatest = "latest"
migrateDown = "down"
)
func applyMigration(ctx context.Context, ctn *service.Container) error {
migr, err := migration.From(ctn)
if err != nil {
return err
}
// Register available migrations
migr.Register(
m000initialSchema(),
)
currentVersion, err := migr.CurrentVersion(ctx)
if err != nil {
return errors.Wrap(err, "could not retrieve current data schema version")
}
switch migrate {
case migrateUp:
if err := migr.Up(ctx); err != nil {
return errors.Wrap(err, "could not apply up migration")
}
case migrateLatest:
latestVersion, err := migr.LatestVersion()
if err != nil {
return errors.Wrap(err, "could not retrieve latest data schema version")
}
logger.Info(
ctx,
"migrating data schema to latest version",
logger.F("currentVersion", currentVersion),
logger.F("latestVersion", latestVersion),
)
// Execute migration to latest available version
if err := migr.Latest(ctx); err != nil {
return errors.Wrap(err, "could not migrate to latest data schema")
}
case migrateDown:
if err := migr.Down(ctx); err != nil {
return errors.Wrap(err, "could not apply down migration")
}
default:
return errors.Errorf("unknown migration command: '%s'", migrate)
}
logger.Info(
ctx,
"migration completed",
)
return nil
}
func m000initialSchema() migration.Migration {
return database.NewMigration(
"00_initial_schema",
func(ctx context.Context, tx pgx.Tx) error {
_, err := tx.Exec(ctx, `
CREATE TABLE users (
id SERIAL PRIMARY KEY,
name TEXT,
email TEXT NOT NULL,
CONSTRAINT unique_email unique(email)
);
`)
return err
},
func(ctx context.Context, tx pgx.Tx) error {
_, err := tx.Exec(ctx, `
DROP TABLE users;
`)
return err
},
)
}