[JavaScript][indexedDB] NotFoundError：无法在IDBDatabase上执行事务：找不到指定的对象存储之一

问题出在request.onupgradeneeded回调中，在我的实现中，我将两个客户端添加到objectStore，其中the same ID个.正如您在the ID should be unique下面的代码中看到的那样.通过添加这两个客户端，该函数抛出了一个错误，并调用了request.onerror，这就是数据库无法打开且未创建对象存储的原因.

request.onupgradeneeded = function (event) {
var db = event.target.result;
console.log("Object Store creation");
var objectstore = db.createObjectStore("client", {
    autoIncrement: true,
});

objectstore.createIndex("name", "name", { unique: false });
objectstore.createIndex("lastName", "lastName", { unique: false });
objectstore.createIndex("email", "email", { unique: true});
objectstore.createIndex("ID", "ID", { unique: true }); //HERE WAS THE PROBLEM
objectstore.createIndex("postal", "postal", { unique: false });
objectstore.createIndex("phoneNumber", "phoneNumber", { unique: true});

for (var i in clientData) {
    objectstore.add(clientData[i]); // Here was the error thrown
}
};

const clientData = [
    {
      name: "Piotr",
      lastName: "Wesoly",
      email: "PiotrWesoly@gmail.com",
      ID: 'CCU238293', //The same ID as in the other client
      postal: "90-234",
      phoneNumber: "500500200"
    },
    {
      name: "Pawel",
      lastName: "Rosiak",
      email: "pawelRosiak@gmail.com",
      ID: 'CCU238293', //The same ID as in the other client
      postal: "93-234",
      phoneNumber: "500400200"
    },
  ];

解决方法很简单:要么是set unique to false个，要么是change the ID of one of the clients个独特的东西.