feat(admin): 优化商品与支付配置列表

backend/internal/modules/paymentconfig/query.go

@@ -2,9 +2,7 @@ package paymentconfig
 
 import (
 	"context"
-	"database/sql/driver"
 	"errors"
-	"time"
 
 	"hfb_sys/backend/internal/model"
 
@@ -63,10 +61,8 @@ func (r *Repository) List(ctx context.Context, query ListQuery) ([]ConfigDTO, in
 		}
 		dtos = append(dtos, dto)
 	}
-	if err := r.applySuccessfulPaymentStats(ctx, dtos); err != nil {
-		return nil, 0, err
-	}
-	if err := r.applyReferenceCounts(ctx, dtos); err != nil {
+
+	if err := r.applyPaymentReferenceFlags(ctx, dtos); err != nil {
 		return nil, 0, err
 	}
 
@@ -86,14 +82,12 @@ func (r *Repository) FindByID(ctx context.Context, id uint64, includeSecret bool
 	if err != nil {
 		return nil, err
 	}
-	statDTOs := []ConfigDTO{dto}
-	if err := r.applySuccessfulPaymentStats(ctx, statDTOs); err != nil {
+
+	dtos := []ConfigDTO{dto}
+	if err := r.applyPaymentReferenceFlags(ctx, dtos); err != nil {
 		return nil, err
 	}
-	if err := r.applyReferenceCounts(ctx, statDTOs); err != nil {
-		return nil, err
-	}
-	dto = statDTOs[0]
+	dto = dtos[0]
 	if includeSecret {
 		if err := appendAuditLog(r.db.WithContext(ctx), actorID, "payment_config.view_secret", item.ID, meta, map[string]any{
 			"name":        item.Name,
@@ -106,15 +100,9 @@ func (r *Repository) FindByID(ctx context.Context, id uint64, includeSecret bool
 	return &dto, nil
 }
 
-type paymentConfigSuccessStat struct {
-	ConfigID          uint64
-	TotalTransactions int64
-	TotalAmountCent   int64
-	LastPaidAt        nullableTime
-}
-
-// applySuccessfulPaymentStats 使用真实成功支付流水覆盖配置统计，避免仅打开二维码也被算作成交。
-func (r *Repository) applySuccessfulPaymentStats(ctx context.Context, dtos []ConfigDTO) error {
+// applyPaymentReferenceFlags 批量标记配置是否已有支付单，用于前端提前禁用删除。
+// 真正的删除保护仍由 Delete 按包含历史数据的口径校验。
+func (r *Repository) applyPaymentReferenceFlags(ctx context.Context, dtos []ConfigDTO) error {
 	if len(dtos) == 0 {
 		return nil
 	}
@@ -123,109 +111,26 @@ func (r *Repository) applySuccessfulPaymentStats(ctx context.Context, dtos []Con
 	for idx, dto := range dtos {
 		ids = append(ids, dto.ID)
 		indexByID[dto.ID] = idx
-		dtos[idx].TotalTransactions = 0
-		dtos[idx].TotalAmountCent = 0
-		dtos[idx].LastUsedAt = nil
+		dtos[idx].HasPaymentRecords = false
 	}
 
-	var rows []paymentConfigSuccessStat
+	var referencedIDs []uint64
 	if err := r.db.WithContext(ctx).Model(&model.PaymentOrder{}).
-		Select("payment_config_id AS config_id, COUNT(*) AS total_transactions, COALESCE(SUM(amount_cent), 0) AS total_amount_cent, MAX(paid_at) AS last_paid_at").
-		Where("payment_config_id IN ? AND biz_type = ? AND status = ?", ids, "order_pay", "paid").
-		Group("payment_config_id").
-		Scan(&rows).Error; err != nil {
+		Where("payment_config_id IN ?", ids).
+		Distinct().
+		Pluck("payment_config_id", &referencedIDs).Error; err != nil {
 		return err
 	}
-	for _, row := range rows {
-		idx, ok := indexByID[row.ConfigID]
+	for _, id := range referencedIDs {
+		idx, ok := indexByID[id]
 		if !ok {
 			continue
 		}
-		dtos[idx].TotalTransactions = row.TotalTransactions
-		dtos[idx].TotalAmountCent = row.TotalAmountCent
-		if row.LastPaidAt.Time != nil {
-			value := row.LastPaidAt.Time.Format(time.RFC3339)
-			dtos[idx].LastUsedAt = &value
-		}
+		dtos[idx].HasPaymentRecords = true
 	}
 	return nil
 }
 
-// applyReferenceCounts 使用删除保护的同一口径统计配置被支付记录引用的次数。
-func (r *Repository) applyReferenceCounts(ctx context.Context, dtos []ConfigDTO) error {
-	for idx := range dtos {
-		count, err := r.referenceCount(ctx, dtos[idx])
-		if err != nil {
-			return err
-		}
-		dtos[idx].ReferenceCount = count
-	}
-	return nil
-}
-
-func (r *Repository) referenceCount(ctx context.Context, dto ConfigDTO) (int64, error) {
-	var count int64
-	db := r.db.WithContext(ctx).Model(&model.PaymentOrder{}).
-		Where("payment_config_id = ?", dto.ID).
-		Or("(payment_config_id = ? OR payment_config_id IS NULL) AND provider = ? AND merchant_id = ? AND pay_way = ?", 0, dto.Provider, dto.MerchantID, dto.PayWay)
-	if err := db.Count(&count).Error; err != nil {
-		return 0, err
-	}
-	return count, nil
-}
-
-type nullableTime struct {
-	Time *time.Time
-}
-
-// Value 实现 driver.Valuer，让 GORM 能把 nullableTime 当作普通扫描字段处理。
-func (nt nullableTime) Value() (driver.Value, error) {
-	if nt.Time == nil {
-		return nil, nil
-	}
-	return *nt.Time, nil
-}
-
-// Scan 兼容 MySQL 聚合函数可能返回的 time.Time 与字符串时间。
-func (nt *nullableTime) Scan(value any) error {
-	switch v := value.(type) {
-	case nil:
-		nt.Time = nil
-	case time.Time:
-		nt.Time = &v
-	case []byte:
-		return nt.scanString(string(v))
-	case string:
-		return nt.scanString(v)
-	default:
-		nt.Time = nil
-	}
-	return nil
-}
-
-func (nt *nullableTime) scanString(value string) error {
-	if value == "" {
-		nt.Time = nil
-		return nil
-	}
-	for _, layout := range []string{
-		time.RFC3339Nano,
-		time.RFC3339,
-		"2006-01-02 15:04:05.999999999-07:00",
-		"2006-01-02 15:04:05-07:00",
-		"2006-01-02 15:04:05.999999999",
-		"2006-01-02 15:04:05",
-	} {
-		parsed, err := time.Parse(layout, value)
-		if err == nil {
-			nt.Time = &parsed
-			return nil
-		}
-	}
-	nt.Time = nil
-	return nil
-}
-
 // FindRuntimeByID 根据配置 ID 查询运行时配置，不写审计日志，供支付单回溯原配置使用。
 func (r *Repository) FindRuntimeByID(ctx context.Context, id uint64, includeSecret bool) (*ConfigDTO, error) {
 	var item model.PaymentMerchantConfig