diff --git a/erp/purchase.go b/erp/purchase.go
index e1f282b..d4ea712 100644
--- a/erp/purchase.go
+++ b/erp/purchase.go
@@ -258,11 +258,12 @@ func (p *purchase) FactoryBatch(ctx context.Context, args ArgsPurchaseFactoryBat
 }
 
 type PurchaseAssociationItem struct {
-	Id        int64  `json:"id"`
-	FactoryId int64  `json:"factoryId"`
-	SaleId    int64  `json:"saleId"`
-	PoSerial  string `json:"poSerial"`
-	BatchNo   int64  `json:"batchNo"`
+	Id         int64  `json:"id"`
+	FactoryId  int64  `json:"factoryId"`
+	SaleId     int64  `json:"saleId"`
+	PoSerial   string `json:"poSerial"`
+	BatchNo    int64  `json:"batchNo"`
+	WorkflowId int64  `json:"workflowId"`
 }
 
 // Association @TITLE 关联采购合同