feat: 添加仅已购用户筛选功能

backend_v1/app/http/dto/user.go

@@ -4,5 +4,7 @@ import "quyun/v2/app/requests"
 
 type UserListQuery struct {
 	*requests.Pagination
-	Keyword *string `query:"keyword"`
+	Keyword *string `query:"keyword"` // 关键词（模糊匹配手机号/用户名；若为数字且>0，则同时按用户 ID 精确匹配）
+
+	OnlyBought *bool `query:"onlyBought"` // 是否仅返回“购买数量>0”的用户（true=仅已购用户；false/空=全部用户）
 }

backend_v1/app/services/users.go

@@ -50,16 +50,57 @@ func (m *users) List(
 
 	query = query.Order(tbl.ID.Desc())
 
+	keyword := ""
 	if filter.Keyword != nil && *filter.Keyword != "" {
+		keyword = strings.TrimSpace(*filter.Keyword)
 		query = query.
-			Where(tbl.Phone.Like(database.WrapLike(*filter.Keyword))).
-			Or(tbl.Username.Like(database.WrapLike(*filter.Keyword)))
+			Where(tbl.Phone.Like(database.WrapLike(keyword))).
+			Or(tbl.Username.Like(database.WrapLike(keyword)))
 
-		if id, err := strconv.ParseInt(strings.TrimSpace(*filter.Keyword), 10, 64); err == nil && id > 0 {
+		if id, err := strconv.ParseInt(keyword, 10, 64); err == nil && id > 0 {
 			query = query.Or(tbl.ID.Eq(id))
 		}
 	}
 
+	if filter.OnlyBought != nil && *filter.OnlyBought {
+		// 仅返回“购买数量>0”的用户：通过 JOIN user_posts 做存在性过滤。
+		// 注意：FindByPage 内部用 Count()，在 GROUP BY 场景下可能不准确，这里改为手动 Count(DISTINCT users.id)。
+		tblUserPost, _ := models.UserPostQuery.QueryContext(ctx)
+		query = query.Join(tblUserPost, tbl.ID.EqCol(tblUserPost.UserID)).Group(tbl.ID)
+
+		offset := int(filter.Pagination.Offset())
+		limit := int(filter.Pagination.Limit)
+
+		items, err := query.Offset(offset).Limit(limit).Find()
+		if err != nil {
+			return nil, errors.Wrap(err, "query users error")
+		}
+
+		db := _db.WithContext(ctx).Model(&models.User{}).
+			Joins("JOIN user_posts ON user_posts.user_id = users.id")
+		if keyword != "" {
+			like := database.WrapLike(keyword)
+			args := []any{like, like}
+			where := "(users.phone LIKE ? OR users.username LIKE ?)"
+			if id, err := strconv.ParseInt(keyword, 10, 64); err == nil && id > 0 {
+				where = "(users.phone LIKE ? OR users.username LIKE ? OR users.id = ?)"
+				args = append(args, id)
+			}
+			db = db.Where(where, args...)
+		}
+
+		var cnt int64
+		if err := db.Distinct("users.id").Count(&cnt).Error; err != nil {
+			return nil, errors.Wrap(err, "count users error")
+		}
+
+		return &requests.Pager{
+			Items:      items,
+			Total:      cnt,
+			Pagination: *filter.Pagination,
+		}, nil
+	}
+
 	items, cnt, err := query.FindByPage(int(filter.Pagination.Offset()), int(filter.Pagination.Limit))
 	if err != nil {
 		return nil, errors.Wrap(err, "query users error")