我有一个返回多个资产的查询。
我需要一个示例事务包装器来显示结果。
我能想到的一切，首先尝试一下（做查询）。我已经用尽了我的Google Fu，这些示例似乎还不能很好地涵盖这一点。我看过driverfines和其他示例。
query getCattleForOwner {
description: "Select all cattle for farmer"
statement:
SELECT org.example.hooftotable.Cattle
WHERE (Farmer == _$owner)
}
针对资产和参与者：
abstract asset Animal identified by animalId {
o String animalId
--> Owner owner
o String sex
o String breed
o Double acquireweight
o DateTime dateexpiry
o Double currweight optional
// animal can be born or bought
o DateTime dob
o DateTime acquiredate optional
// animal can be sold or killed
o DateTime killdate optional
o String killreason optional
o DateTime dateshipped optional
o DateTime datereceived optional
// animals are usually ided by an eartag
o String eartag
// animals are sold by the pound
o Double priceperpound optional
// processor usually charge by animal/weight
--> Transporter transporter optional
o String typeoffeed
o String grade optional
--> Processor processor optional
o Double processingfee optional
o DateTime processingdate optional
o Double wasteweight optional
o Boolean processed default = false
}
asset Cattle extends Animal {
o String type default = 'Beef'
o Boolean dehorned default = false
o Boolean castrated default = false
}
abstract participant Owner identified by ownerid {
o String ownerid
o String firstname
o String lastname
o String street
o String streetaddress
o String city
o String state
o String zip
o String phone
}
participant Farmer extends Owner {
o String type default = 'Farmer'
// animals for sale are from registered farmers
o String farmregcode
}
并且正在尝试使用此事务包装器：
async function CallgetCattleforOwner(owner) {
const cattle = [];
const cattleRegistry = await
getAssetRegistry('org.example.hooftotable.Cattle);
const results = await query('getCattleforOwner', {owner:'tx.owner'});
for (let n = 0; n < results.length; n++) {
let cattle = results[n];}
通过超级账本游乐场使用以下方式提交：
{
"$class": "org.example.hooftotable.CallgetCattleforOwner",
"owner":"resource:org.example.hooftotable.Farmer#XdyQXV3k0Z239wuv"
}
产生的错误是：
错误：ID为'$ sysregistries'的集合中ID为'Asset：org.sample.hooftotable.Cattle'的对象不存在
我想获取特定农民拥有的，尚未经过处理且未因其他原因被杀死的牛的清单。我希望将其显示在作曲家游乐场中，并最终显示在前端。
我已将交易修改为：
async function CallgetCattleforOwner (owner){
var x = 0;
return getAssetRegistry('org.example.hooftotable.Cattle')
.then(function (assetRegistry) {
return query('getCattleForOwner',{'owner':owner})
.then (function (results) {
x = results.length;
for (var n = 0; n < results.length; n++) {
var cattle = results[n];
var QueryCattle = getFactory().newEvent('org.example.hooftotable','QueryCattle');
QueryCattle.cattle = cattle;
emit(QueryCattle);
console.log(QueryCattle);
}
});
});
console.log(x);
}
现在它可以正确执行，但是也不产生任何事件，如何从console.log调用中看到结果？