如何在Jquery

Question

我有一个JSON数据对象，我从mongoDB检索。它具有以下格式：

var billData = [{
    "_id": "PT155/454",
    "_class": "com.aventyn.hms.domain.OPDBill",
    "billingDate": "2017-11-20",
    "patientId": "PT155",
    "transactions": [{
        "txnId": "PT155/454/1",
        "toBePaid": "0",
        "txnAmount": "0",
        "due": "0",
        "selfPay": true
    }, {
        "txnId": "PT155/454/2",
        "toBePaid": "450",
        "txnAmount": "350",
        "due": "100",
        "selfPay": false
    }]
}, {
    "_id": "PT156/455",
    "_class": "com.aventyn.hms.domain.OPDBill",
    "billingDate": "2017-11-20",
    "patientId": "PT156",
    "transactions": [{
        "txnId": "PT156/455/1",
        "toBePaid": "300",
        "txnAmount": "200",
        "due": "100",
        "selfPay": true
    }, {
        "txnId": "PT156/455/2",
        "toBePaid": "100",
        "txnAmount": "50",
        "due": "50",
        "selfPay": true
    }]
}];

我的问题是我要删除那些具有selfPay: false属性的事务，我正在执行以下操作，但它无法正常工作：

$.each(billData, function (k, v) {
    $.each(v.transactions, function (tK, tV) {
        if (tV.selfPay == true) {
            billData[k].transactions = tV;
        }
    });
});

但是我获得的数据与我从数据库中获得的数据相同。

我知道如何实现这一目标？

感谢您的帮助。

jsfiddle的链接是：https://jsfiddle.net/0uy38pLf/

Answer 1

您可以使用Array#map和Array#filter的组合来获得所需的结果（甚至不使用任何jQuery方法）：

var billData = [{
    "_id": "PT155/454",
    "_class": "com.aventyn.hms.domain.OPDBill",
    "billingDate": "2017-11-20",
    "patientId": "PT155",
    "transactions": [{
        "txnId": "PT155/454/1",
        "toBePaid": "0",
        "txnAmount": "0",
        "due": "0",
        "selfPay": true
      },
      {
        "txnId": "PT155/454/2",
        "toBePaid": "450",
        "txnAmount": "350",
        "due": "100",
        "selfPay": false
      }
    ]

  },
  {
    "_id": "PT156/455",
    "_class": "com.aventyn.hms.domain.OPDBill",
    "billingDate": "2017-11-20",
    "patientId": "PT156",
    "transactions": [{
        "txnId": "PT156/455/1",
        "toBePaid": "300",
        "txnAmount": "200",
        "due": "100",
        "selfPay": true
      },
      {
        "txnId": "PT156/455/2",
        "toBePaid": "100",
        "txnAmount": "50",
        "due": "50",
        "selfPay": true
      }

    ]
  }
];

var result = billData.map(bill => {
  bill.transactions = bill.transactions.filter(tran => tran.selfPay);
  return bill;
});

console.log(result);

Answer 2

据我所知，它可能会更好，你否定了if子句。这样您就可以查看selfPay === false。

console.log(billData);
$.each(billData,function(k,v){
    $.each(v.transactions,function(tK,tV){
        if(tV.selfPay === false ){
            billData[k].transactions.splice(tK, 1);
        }
    });
});
console.log(billData)

另外我猜你想要删除那个单项。要删除单个项目，请使用splice函数，该函数将获取您要删除的项目的索引tK。

希望它有所帮助！