對于將記錄寫入文件的循環，只打印最后一項

我正在嘗試將forloop寫入json文件，它只打印數組中的最后一項

    let rawdata = fs.readFileSync('./input_data.json');
    let jsondata = JSON.parse(rawdata);
    let result='';
    let key='';
    let data = {
       items: []
    } 
    myrecords=[];
      for(let i = 0; i < jsondata.records.length; i++) {
        let obj = jsondata.records[i];
        result = obj.Id
        items = jsondata.records[i].data
        data.items = [items];
        data.key=result
        myrecords.push(data)
      }
   var log_file = fs.createWriteStream(__dirname + '/output.json', {flags : 'w'});
   var log_stdout = process.stdout;
   console.log = function(d) {
    log_file.write(util.format(d) + '\n');
    log_stdout.write(util.format(d) + '\n');
   };
   console.log(JSON.stringify(myrecords, null, 2))