I am getting an array in request body like :

[

{
   "month" : "JUL",
   "year" :"2018"
},
{
   "month" : "JAN",
   "year" :"2018"
},
{
   "month" : "MAR",
   "year" :"2018"
}
    ]

This input has two parameters (month:enum and year:string).

I need to loop through this array and call the chaincode and finally send the response . I have done the following :

     for(var i=0; i<req.body.length; i++) {
                    var month = req.body[i].month;
                    var year = req.body[i].year;
                    var monthYear = month + year;
    key = monthYear + "_new";
        console.log("Key is ", key);
            var request = {
            //targets: let default to the peer assigned to the client
            chaincodeId: 'abc',
            fcn: 'getTransactionsByKey',
            args: [key]

//Calling chaincode smartcontract
return channel.queryByChaincode(request);
}

but the response is ing correct if I pass only one input parameter . If I pass two values in input , the 2nd value result overrides the first one . Any help on how can I get response for all the list of inputs with the overlapping part.

Also , I need to sort the input values before calling the chaincode , like if I get Feb Mar Jan in the input , I should sort it as Jan Feb Mar and then run the for loop.

Any help on this is appreciated.

Thanks in advance. Thanks.

I am getting an array in request body like :

[

{
   "month" : "JUL",
   "year" :"2018"
},
{
   "month" : "JAN",
   "year" :"2018"
},
{
   "month" : "MAR",
   "year" :"2018"
}
    ]

This input has two parameters (month:enum and year:string).

I need to loop through this array and call the chaincode and finally send the response . I have done the following :

     for(var i=0; i<req.body.length; i++) {
                    var month = req.body[i].month;
                    var year = req.body[i].year;
                    var monthYear = month + year;
    key = monthYear + "_new";
        console.log("Key is ", key);
            var request = {
            //targets: let default to the peer assigned to the client
            chaincodeId: 'abc',
            fcn: 'getTransactionsByKey',
            args: [key]

//Calling chaincode smartcontract
return channel.queryByChaincode(request);
}

but the response is ing correct if I pass only one input parameter . If I pass two values in input , the 2nd value result overrides the first one . Any help on how can I get response for all the list of inputs with the overlapping part.

Also , I need to sort the input values before calling the chaincode , like if I get Feb Mar Jan in the input , I should sort it as Jan Feb Mar and then run the for loop.

Any help on this is appreciated.

Thanks in advance. Thanks.

• javascript
• node.js
• express
• swagger
• hyperledger

Share Improve this question Follow edited Aug 1, 2018 at 4:21 newTask asked Jul 26, 2018 at 6:43 newTasknewTask 8711 gold badge22 silver badges99 bronze badges 3

• 1 What exactly you means by parsing, some kind of string manipulation or what ? – Anirudha Gupta Commented Jul 26, 2018 at 6:46
• Possible duplicate of Parse Array of JSON objects in NodeJS – Helen Commented Jul 26, 2018 at 6:53
• Can you console.log(req.body.transaction) and see is that what you want – Sridhar Commented Jul 26, 2018 at 7:37

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2 Answers 2

Sorted by: Reset to default 2

You can use body-parser in your app.js like this:

app.use(bodyParser.urlencoded({ 
     extended: true 
}));

Let's say you are receiving array in the post request body with the key: users you will parse it like this:

req.body.users

(It contains the users array)

Do you want to get the value from the key ?

for (var key in req.body) {
  if (req.body.hasOwnProperty(key)) {
    let value = req.body[key];
    console.log( `value for ${key} is ${value}` )
  }
}