如何查找特定资产的交易是否已存在以及超级分类合成者的参与者？ [英] How to find whether the transaction already exist for particular asset and participant in hyperledger composer?

问题描述

Participant 
IDFC 

Participant
TATA , MRF 

Asset
FINANCEPROGRAM 

Transaction
(Data need to submit)
participant(TATA) ,Asset (FINANCEPROGRAM ) ,loanAmount , loantenure

我需要检查FINANCEPROGRAM和TATA的交易是否已经存在。

I need to check whether the transaction for FINANCEPROGRAM and TATA are already exist.

如果存在，我需要拒绝交易。

If so exist i need to reject the transaction.

var query1 = query('SELECT com.ett.blockchain.Programmeben WHERE (beneficiary == _$beneficiary AND bankprogramme == _$bank program) ');

 return  query('query1',{beneficiary : 'resource:com.ett.blockchain.Beneficiary #'+pgben.beneficiary .customerid,bankprogram: 'resource:com.ett.blockchain.Bankprogramme#'+pgben.bankprogramme.programmeid})

  .then(function (transactions1) {

   transactions1.forEach(function (trans1) {    

       console.log("transaction exist " );

        });

    throw Error("Transaction already exist");

});

推荐答案

你错过了 buildQuery 声明。

例如

var query1 = buildQuery('SELECT com.ett.blockchain.Programmeben WHERE (beneficiary == _$beneficiary AND bankprogramme == _$bank program) ');

return query(query1, { beneficiary : 'resource:com.ett.blockchain.Beneficiary#' + pgben.beneficiary.customerid, bankprogram: 'resource:com.ett.blockchain.Bankprogramme#' + pgben.bankprogramme.programmeid } )

请参阅此处的示例（具体来说，'Javascript code js'部分） - > 为什么以下增加了资产不存在于超级注册表中？

See examples here (specifically, the 'Javascript code js' section) -> Why are the following added assets not persisted in the hyperledger registry?

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