feat: image variants engine

internal/infrastructure/persistence/database/migrate.go

@@ -7,9 +7,29 @@ import (
 )
 
 func Migrate(db *gorm.DB) error {
-	err := tableOptionsFor(db).AutoMigrate(&models.Article{}, &models.Image{}, &models.User{}, &models.Invite{}, &models.APIKey{}, &models.PurgeSettings{}, &models.AuditEvent{}, &models.AuditSettings{})
+	err := tableOptionsFor(db).AutoMigrate(&models.Article{}, &models.Image{}, &models.User{}, &models.Invite{}, &models.APIKey{}, &models.PurgeSettings{}, &models.AuditEvent{}, &models.AuditSettings{}, &models.ImageVariant{}, &models.ImageVariantFile{})
 	if err != nil {
 		return err
 	}
+	if err := ensureImagePathIndex(db); err != nil {
+		return err
+	}
 	return BackfillUserRoles(db)
 }
+
+const (
+	imagePathIndexName      = "idx_images_path"
+	mysqlDialectorName      = "mysql"
+	imagePathIndexStatement = "CREATE INDEX " + imagePathIndexName + " ON images (path)"
+	mysqlImagePathStatement = "CREATE INDEX " + imagePathIndexName + " ON images (path(191))"
+)
+
+func ensureImagePathIndex(db *gorm.DB) error {
+	if db.Migrator().HasIndex(&models.Image{}, imagePathIndexName) {
+		return nil
+	}
+	if db.Dialector.Name() == mysqlDialectorName {
+		return db.Exec(mysqlImagePathStatement).Error
+	}
+	return db.Exec(imagePathIndexStatement).Error
+}