修改错误提示信息 添加对需求小于0的处理

services/ap/implments/Balance.service.impl.go

@@ -3041,7 +3041,7 @@ func (impl *BalanceServiceImplement) MpsPlanExport(user *global.User, CustArtSto
 		return "", grmi.NewBusinessError("查询物料需求数据失败, 错误:" + err.Error())
 	}
 	if len(artDemandLi) == 0 {
-		return "", grmi.NewBusinessError("未查询到需要到处的需求数据")
+		return "", grmi.NewBusinessError("未查询到需要导导出的需求数据")
 	}
 	// 构建map数据 map[artId]map[demandKey]model.ArticleDemand
 	artOpeningInventoryMap := make(map[string]float64)
@@ -3091,6 +3091,9 @@ func (impl *BalanceServiceImplement) MpsPlanExport(user *global.User, CustArtSto
 						qty = artDemand.OrderQty
 					}
 					qty = qty + artDemand.IndependentDemandQty - artDemand.OutSourcingQty
+					if qty < 0 {
+						qty = 0
+					}
 					demandQty.Qty += qty
 					productQty.Qty += artDemand.NetDemandQty
 					artDemandData.OutSourcingQty += artDemand.OutSourcingQty