weijuesen
65 lines
1.8 KiB
Go
65 lines
1.8 KiB
Go
package database
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import (
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"errors"
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"fmt"
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"strconv"
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"github.com/golang-migrate/migrate/v4"
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"github.com/golang-migrate/migrate/v4/database/postgres"
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"github.com/golang-migrate/migrate/v4/source/iofs"
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"gorm.io/gorm"
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"silk-server-go/migrations"
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)
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// CurrentSchemaVersion 是当前后端代码期望的迁移版本。
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const CurrentSchemaVersion = "6"
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// RunMigrations 使用嵌入式 SQL 迁移文件将数据库升级到最新版本。
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func RunMigrations(db *gorm.DB) error {
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sqlDB, err := db.DB()
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if err != nil {
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return fmt.Errorf("获取数据库连接: %w", err)
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}
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sourceDriver, err := iofs.New(migrations.FS, ".")
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if err != nil {
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return fmt.Errorf("加载嵌入式迁移文件: %w", err)
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}
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defer sourceDriver.Close()
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databaseDriver, err := postgres.WithInstance(sqlDB, &postgres.Config{})
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if err != nil {
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return fmt.Errorf("初始化 PostgreSQL 迁移驱动: %w", err)
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}
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m, err := migrate.NewWithInstance("iofs", sourceDriver, "postgres", databaseDriver)
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if err != nil {
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return fmt.Errorf("创建迁移实例: %w", err)
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}
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if err := m.Up(); err != nil && !errors.Is(err, migrate.ErrNoChange) {
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return fmt.Errorf("执行数据库迁移: %w", err)
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}
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return nil
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}
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// CheckSchemaVersion 校验 schema_migrations 当前版本与 expected 一致，且不是 dirty。
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func CheckSchemaVersion(db *gorm.DB, expected string) error {
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var version int64
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var dirty bool
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row := db.Raw("SELECT version, dirty FROM schema_migrations ORDER BY version DESC LIMIT 1").Row()
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if err := row.Scan(&version, &dirty); err != nil {
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return fmt.Errorf("读取 schema_migrations: %w", err)
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}
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if dirty {
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return fmt.Errorf("schema 迁移处于 dirty 状态，版本 %d", version)
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}
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if strconv.FormatInt(version, 10) != expected {
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return fmt.Errorf("schema 版本不匹配：当前 %d，期望 %s", version, expected)
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}
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return nil
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}
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