查询超级账本历史学家

Question

我正在开发Hyperledger composer应用程序，并且想要获取特定客户端的所有交易（participantInvoking）。

这是我在Permission.acl中的代码：

rule ProducerCanReadClientTxHistorian {
  description: "Read historian of an client"
  participant: "org.hyperledger.composer.system.Participant"
  operation: READ
  resource: "org.hyperledger.composer.system.HistorianRecord"
  action: ALLOW
}

这是查询：

query selectTxOfClientID {
  description: "Select all tx of Client x"
  statement:
      SELECT org.hyperledger.composer.system.HistorianRecord 
          WHERE (participantInvoking == _$clientId)
}

但是当我通过使用REST API提供利益相关者ID来执行此查询时，它会提供空的响应正文。

您是如何解决的？

screenshot of rest api for input value.

clientId的值为2814，我应该输入其他值（例如“ resource：org.example.Client＃2814”）还是其他值？

“ GET / system / historian ”（返回所有历史学家）的响应如下：

{
    "$class": "org.hyperledger.composer.system.HistorianRecord",
    "transactionId": "4524d8b127be3b2fab008d73228cedf92bfc7cf46ada6e8355070ebbbe83f74e",
    "transactionType": "org.example.Tx",
    "transactionInvoked": "resource:org.example.Tx#4524d8b127be3b2fa28cedf92bfc7cf46ada6e8355070ebbbe83f74e",
    "participantInvoking": "resource:org.example.Client#2814",
    "identityUsed": "resource:org.hyperledger.composer.system.Identity#6fe4f7cbc1fce39598fdc1c1afe4d3324466c78ee40f0ab1fa3c",
    "eventsEmitted": [
      {
        "$class": "org.example.TxEvent",
        "newTimestamp": "0000000001",
        "newProdottoUsato": "resource:org.example.Product#900",
        "newCount": 0,
        "eventId": "4524d8b127be3b2fd73228cedf92bfc7cf46ada6e8355070ebbbe83f74e#0",
        "timestamp": "2019-01-11T11:33:48.129Z"
      }
    ],
    "transactionTimestamp": "2019-01-11T11:33:48.129Z"
  },