Query All Cars | fabric-samples > chaincode > fabcar > node > fabcar.js

async queryAllCars(stub, args) {

  let startKey = 'CAR0';
  let endKey = 'CAR999';

  let iterator = await stub.getStateByRange(startKey, endKey);

  let allResults = [];
  while (true) {
    let res = await iterator.next();

    if (res.value && res.value.value.toString()) {
      let jsonRes = {};
      console.log(res.value.value.toString('utf8'));

      jsonRes.Key = res.value.key;
      try {
        jsonRes.Record = JSON.parse(res.value.value.toString('utf8'));
      } catch (err) {
        console.log(err);
        jsonRes.Record = res.value.value.toString('utf8');
      }

      allResults.push(jsonRes);
    }
    if (res.done) {
      console.log('end of data');
      await iterator.close();
      console.info(allResults);
      return Buffer.from(JSON.stringify(allResults));
    }
  }
}