优化mongo，封装count逻辑，处理objectId

dao/advertisement_dao.go

@@ -6,12 +6,10 @@ import (
 	"context"
 	"time"
 
-	"gitee.com/red-future---jilin-g/common/http"
 	"gitee.com/red-future---jilin-g/common/mongo"
 	"github.com/gogf/gf/v2/frame/g"
 	"github.com/gogf/gf/v2/util/gconv"
 	"go.mongodb.org/mongo-driver/v2/bson"
-	"go.mongodb.org/mongo-driver/v2/mongo/options"
 )
 
 var Advertisement = &advertisement{}
@@ -231,24 +229,7 @@ func (d *advertisement) List(ctx context.Context, req *dto.ListAdvertisementReq)
 		return
 	}
 
-	// 分页参数处理
-	pageNum := req.PageNum
-	if pageNum <= 0 {
-		pageNum = 1
-	}
-	pageSize := req.PageSize
-	if pageSize <= 0 {
-		pageSize = http.PageSize
-	}
-
-	limit := int64(pageSize)
-	skip := int64((pageNum - 1) * pageSize)
-
-	// 排序处理
-	sort := bson.M{"createdAt": -1}
-
-	opts := options.Find().SetLimit(limit).SetSkip(skip).SetSort(sort)
-
-	err = mongo.DB().Find(ctx, filter, &list, entity.AdvertisementCollection, opts)
+	// 使用common/mongo的Find方法，自动处理分页、租户等
+	total, err = mongo.DB().Find(ctx, filter, &list, entity.AdvertisementCollection, req.Page, nil)
 	return
 }