fix:衍生指标保存

models/data_manage/edb_classify.go

@@ -412,7 +412,7 @@ func (edbClassify *EdbClassify) Update(cols []string) (err error) {
 
 // GetEdbClassifyMaxSort 获取分类下最大的排序数
 func GetEdbClassifyMaxSort(parentId int, classifyType uint8) (sort int, err error) {
-	sql := `SELECT Max(sort) AS sort FROM edb_classify WHERE parent_id=? AND classify_type=? `
+	sql := `SELECT COALESCE(Max(sort), 0) AS sort FROM edb_classify WHERE parent_id=? AND classify_type=? `
 	err = global.DmSQL["data"].Raw(sql, parentId, classifyType).Scan(&sort).Error
 
 	return
@@ -420,7 +420,7 @@ func GetEdbClassifyMaxSort(parentId int, classifyType uint8) (sort int, err erro
 
 // GetEdbInfoMaxSortByClassifyId 获取分类下指标的最大的排序数
 func GetEdbInfoMaxSortByClassifyId(classifyId int) (sort int, err error) {
-	sql := `SELECT Max(sort) AS sort FROM edb_info WHERE classify_id=? `
+	sql := `SELECT COALESCE(Max(sort), 0) AS sort FROM edb_info WHERE classify_id=? `
 	err = global.DmSQL["data"].Raw(sql, classifyId).Scan(&sort).Error
 
 	return