优化后台高频查询性能

backend/internal/modules/adminfinance/dashboard.go

@@ -7,6 +7,9 @@ import (
 )
 
 func (r *Repository) Dashboard(ctx context.Context, query DashboardQuery) (*DashboardDTO, error) {
+	if cached := r.loadDashboardCache(ctx, query); cached != nil {
+		return cached, nil
+	}
 	dailyItems, err := r.dailyItems(ctx, query)
 	if err != nil {
 		return nil, err
@@ -31,7 +34,7 @@ func (r *Repository) Dashboard(ctx context.Context, query DashboardQuery) (*Dash
 	if err != nil {
 		return nil, err
 	}
-	return &DashboardDTO{
+	result := &DashboardDTO{
 		Summary:                 *summary,
 		DailyItems:              dailyItems,
 		PickupSummary:           *pickup,
@@ -39,7 +42,9 @@ func (r *Repository) Dashboard(ctx context.Context, query DashboardQuery) (*Dash
 		DisbursementSummary:     *disbursement,
 		OperatingExpenseSummary: *operatingExpense,
 		GeneratedAt:             timeutil.ShanghaiNow(),
-	}, nil
+	}
+	r.storeDashboardCache(ctx, query, result)
+	return result, nil
 }
 
 func (r *Repository) operatingExpenseSummary(ctx context.Context, query DashboardQuery) (*OperatingExpenseSummaryDTO, error) {

backend/internal/modules/adminfinance/dashboard_cache.go

@@ -0,0 +1,41 @@
+package adminfinance
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+const dashboardCacheTTL = time.Minute
+
+func (r *Repository) dashboardCacheKey(query DashboardQuery) string {
+	return fmt.Sprintf("admin-finance:dashboard:v1:%d:%d", query.StartDate.Unix(), query.EndDate.Unix())
+}
+
+func (r *Repository) loadDashboardCache(ctx context.Context, query DashboardQuery) *DashboardDTO {
+	if r.redis == nil {
+		return nil
+	}
+	raw, err := r.redis.Get(ctx, r.dashboardCacheKey(query)).Bytes()
+	if err != nil {
+		return nil
+	}
+	var value DashboardDTO
+	if err := json.Unmarshal(raw, &value); err != nil {
+		return nil
+	}
+	return &value
+}
+
+func (r *Repository) storeDashboardCache(ctx context.Context, query DashboardQuery, value *DashboardDTO) {
+	if r.redis == nil || value == nil {
+		return
+	}
+	raw, err := json.Marshal(value)
+	if err != nil {
+		return
+	}
+	// 缓存不可用时静默降级到实时统计，不能影响财务页面可用性。
+	_ = r.redis.Set(ctx, r.dashboardCacheKey(query), raw, dashboardCacheTTL).Err()
+}

backend/internal/modules/adminfinance/repository.go

@@ -1,13 +1,19 @@
 package adminfinance
 
 import (
+	"github.com/redis/go-redis/v9"
 	"gorm.io/gorm"
 )
 
 type Repository struct {
-	db *gorm.DB
+	db    *gorm.DB
+	redis *redis.Client
 }
 
-func NewRepository(db *gorm.DB) *Repository {
-	return &Repository{db: db}
+func NewRepository(db *gorm.DB, redisClient ...*redis.Client) *Repository {
+	repo := &Repository{db: db}
+	if len(redisClient) > 0 {
+		repo.redis = redisClient[0]
+	}
+	return repo
 }