Create database version tracking

backend/database/database.go

@@ -11,9 +11,30 @@ func MigrateStructure(db ...*gorm.DB) error {
 		targetDB = DB
 	}
 
-	err := targetDB.AutoMigrate()
+	err := targetDB.AutoMigrate(
+		&SchemaVersion{},
+		&MigrationHistory{},
+	)
 	if err != nil {
 		return err
 	}
 	return nil
 }
+
+func MigrateDataIfNeeded(db *gorm.DB) error {
+	// Implement data migration logic here if needed
+	schemaVersion := SchemaVersion{}
+	err := db.First(&schemaVersion, "version = ?", "0.1.37").Error
+	if err != nil {
+		// No initial version found, assume no migration needed
+		schemaVersion.Version = "0.1.37"
+		schemaVersion.MigrationNumber = 1
+		schemaVersion.BackendVersion = "0.1.37"
+		schemaVersion.Description = "Initial schema version"
+		err = db.Create(&schemaVersion).Error
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

backend/database/model.go

@@ -0,0 +1,36 @@
+package database
+
+// SchemaVersion represents the schema_version table
+type SchemaVersion struct {
+	ID              uint   `gorm:"primaryKey;autoIncrement"`
+	Version         string `gorm:"size:20;not null;index"`
+	MigrationNumber int    `gorm:"not null;index"`
+	AppliedAt       int64  `gorm:"autoCreateTime"`
+	BackendVersion  string `gorm:"size:20;not null"`
+	Description     string `gorm:"type:text"`
+	Checksum        string `gorm:"size:64"`
+}
+
+// TableName sets the table name for SchemaVersion
+func (SchemaVersion) TableName() string {
+	return "schema_version"
+}
+
+// MigrationHistory represents the migration_history table
+type MigrationHistory struct {
+	ID                uint   `gorm:"primaryKey;autoIncrement"`
+	MigrationNumber   int    `gorm:"not null;uniqueIndex"`
+	Version           string `gorm:"size:20;not null;index"`
+	Description       string `gorm:"type:text;not null"`
+	AppliedAt         int64  `gorm:"autoCreateTime"`
+	AppliedBy         string `gorm:"size:100"`
+	ExecutionTimeMs   int64
+	Success           bool   `gorm:"default:true"`
+	ErrorMessage      string `gorm:"type:text"`
+	RollbackAvailable bool   `gorm:"default:true"`
+}
+
+// TableName sets the table name for MigrationHistory
+func (MigrationHistory) TableName() string {
+	return "migration_history"
+}

backend/maintenance/handlers.go

@@ -63,9 +63,15 @@ func migrateAllStructures(db *gorm.DB) error {
 func migrateDataIfNeeded(db *gorm.DB) error {
 	logger.Debug("Starte Datenmigration falls erforderlich...")
 
+	err := database.MigrateDataIfNeeded(db)
+	if err != nil {
+		logger.Error("Fehler beim Migrieren der Datenbankdaten: %s", err.Error())
+		return fmt.Errorf("failed to migrate database data: %w", err)
+	}
+
 	// Kopiere categorie nach learning_category für Spells, wenn learning_category leer ist
 	logger.Debug("Migriere Spell Learning Categories...")
-	err := migrateSpellLearningCategories(db)
+	err = migrateSpellLearningCategories(db)
 	if err != nil {
 		logger.Error("Fehler beim Migrieren der Spell Learning Categories: %s", err.Error())
 		return fmt.Errorf("failed to migrate spell learning categories: %w", err)