webapi生成采购入库单的业务类型赋值

1 业务需要要生成资产类型的采购入库单
2 生成资产类型的采购入库单的接口 {"Creator":"demo","NeedUpDateFields":[""],"Model":{"FID":0,"FBillTypeID":{"FNumber":"RKD05_SYS"},"FBusinessType":"ZCCG",
"FStockOrgId":{"FNumber":"100"},"FPurchaseOrgId":{"FNumber":"100"},"FSupplierId":{"FNumber":"20002"},"FSettleOrgId":{"FNumber":"100"},"FOwnerHead":{"FNumber":"100"},"FDemandOrgId":{"FNumber":"100"},"FBillNo":null,"FSOURCESTKNUMBER":"ZJDB000001","FDate":"\/Date(1523935281000+0800)\/","FCreateDate":"\/Date(1523935281000+0800)\/","FInStockEntry":[{"FEntryID":0,"FID":0,"FMaterialId":{"FNumber":"010101000001"},"FRealQty":2.0000000000,"FTaxPrice":0.0,"FStockStatusId":{"FNumber":"KCZT01_SYS"},"FStockId":{"FNumber":"CK002"},"FLot":null,"FPriceUnitId":{"FNumber":"kg"},"FUnitId":{"FNumber":"kg"},"FRemainInStockUnitId":{"FNumber":"kg"},"FPriceQty":2.0000000000},{"FEntryID":0,"FID":0,"FMaterialId":{"FNumber":"010200000001"},"FRealQty":5.0000000000,"FTaxPrice":0.0,"FStockStatusId":{"FNumber":"KCZT01_SYS"},"FStockId":{"FNumber":"CK002"},"FLot":null,"FPriceUnitId":{"FNumber":"kg"},"FUnitId":{"FNumber":"kg"},"FRemainInStockUnitId":{"FNumber":"kg"},"FPriceQty":5.0000000000}]}}
3 执行的时候报错，提示分录必填

4 取消业务类型字段的值"FBusinessType":"ZCCG"，就能正常保存
5 查询了标准的保存接口，里面没有字段FBusinessType，如果想通过接口来实现保存FBusinessType的值，该怎么操作呢，麻烦各位大神给些建议和思路。