callback 검증 보강. seed-tenant 추가보강

backend/internal/bootstrap/tenant_seed.go

@@ -42,15 +42,6 @@ type InitialTenantConfig struct {
 func SeedTenants(db *gorm.DB) error {
 	slog.Info("[Bootstrap] Checking initial tenant seed...")
 
-	var tenantCount int64
-	if err := db.Model(&domain.Tenant{}).Count(&tenantCount).Error; err != nil {
-		return fmt.Errorf("count tenants before seed: %w", err)
-	}
-	if tenantCount > 0 {
-		slog.Info("[Bootstrap] Tenant seed skipped because tenants already exist", "count", tenantCount)
-		return nil
-	}
-
 	configs, err := loadSeedTenantConfigs()
 	if err != nil {
 		return err
@@ -59,7 +50,62 @@ func SeedTenants(db *gorm.DB) error {
 		return errors.New("seed tenant csv has no tenant rows")
 	}
 
-	return seedTenantConfigs(db, configs)
+	existingSlugs, existingIDs, err := loadExistingTenantIdentitySet(db)
+	if err != nil {
+		return err
+	}
+
+	missingConfigs := filterMissingSeedTenantConfigs(configs, existingSlugs, existingIDs)
+	if len(missingConfigs) == 0 {
+		slog.Info("[Bootstrap] Tenant seed skipped because all seed slugs already exist", "count", len(configs))
+		return nil
+	}
+
+	slog.Info(
+		"[Bootstrap] Tenant seed will create missing seed tenants",
+		"total", len(configs),
+		"missing", len(missingConfigs),
+		"existing", len(configs)-len(missingConfigs),
+	)
+	return seedTenantConfigs(db, missingConfigs)
+}
+
+func loadExistingTenantIdentitySet(db *gorm.DB) (map[string]bool, map[string]bool, error) {
+	var tenants []domain.Tenant
+	if err := db.Select("id", "slug").Find(&tenants).Error; err != nil {
+		return nil, nil, fmt.Errorf("load existing tenants before seed: %w", err)
+	}
+
+	slugs := make(map[string]bool, len(tenants))
+	ids := make(map[string]bool, len(tenants))
+	for _, tenant := range tenants {
+		slug := strings.TrimSpace(strings.ToLower(tenant.Slug))
+		if slug != "" {
+			slugs[slug] = true
+		}
+		id := strings.TrimSpace(strings.ToLower(tenant.ID))
+		if id != "" {
+			ids[id] = true
+		}
+	}
+	return slugs, ids, nil
+}
+
+func filterMissingSeedTenantConfigs(configs []InitialTenantConfig, existingSlugs map[string]bool, existingIDs map[string]bool) []InitialTenantConfig {
+	filtered := make([]InitialTenantConfig, 0, len(configs))
+	for _, config := range configs {
+		slug := strings.TrimSpace(strings.ToLower(config.Slug))
+		id := strings.TrimSpace(strings.ToLower(config.TenantID))
+		if slug == "" || existingSlugs[slug] || (id != "" && existingIDs[id]) {
+			continue
+		}
+		filtered = append(filtered, config)
+		existingSlugs[slug] = true
+		if id != "" {
+			existingIDs[id] = true
+		}
+	}
+	return filtered
 }
 
 func seedTenantConfigs(db *gorm.DB, configs []InitialTenantConfig) error {