优化mongo，封装count逻辑，处理objectId

service/advertisement_service.go

@@ -5,7 +5,6 @@ import (
 	"cid/model/dto"
 	"cid/model/entity"
 	"context"
-	"time"
 
 	"github.com/gogf/gf/v2/util/gconv"
 )
@@ -21,15 +20,10 @@ func (s *advertisement) Add(ctx context.Context, req *dto.AddAdvertisementReq) (
 		return
 	}
 
-	// 设置基础字段
-	now := time.Now()
-	advertisement.CreatedAt = now
-	advertisement.UpdatedAt = now
-	advertisement.IsDeleted = false
-
 	// 设置初始状态
 	advertisement.Status = "待审核"
 
+	// 注意：CreatedAt、UpdatedAt、TenantId、IsDeleted等字段由common/mongo的Insert方法自动设置
 	if err = dao.Advertisement.Insert(ctx, advertisement); err != nil {
 		return
 	}