javascript - 即使使用 oncomplete 后，IndexedDB DOM IDBDatabase 异常 11

Question

我对 IndexedDB 概念非常陌生。我正在尝试在 IndexedDB 中存储电影列表并检索它。但由于某种原因，当我尝试检索它时，chrome 浏览器中出现 DOM IDBDatabase Exception 11。我尝试使用简单的警报来检索它。我还尝试通过将警报放入 onComplete 事件中来检索数据，但这似乎也失败了。有人可以让我知道我做错了什么吗？下面是我的代码。

const dbName = "movies";
var request = indexedDB.open(dbName, 1);
request.onerror = function(event) {
    alert("Seems like there is a kryptonite nearby.... Please Check back later");
};

request.onsuccess = function(event) {
    var db = event.target.result;
var transaction = db.transaction(["movies"],"readwrite");
var objectStore = transaction.objectStore("movies");
var request1 = objectStore.get("1");
request1.result.oncomplete=function(){
alert("The movie is"+request1.result.name);//This is the place where i get the error
}
};

request.onupgradeneeded = function(event) {
    db = event.target.result;
    var objectStore = db.createObjectStore("movies", { keyPath: "movieid" });
    objectStore.createIndex("name", "name", { unique: false });
    objectStore.createIndex("runtime", "runtime", { unique: false });
    for (var i in movieDataToStore) {
objectStore.add(movieDataToStore[i]);
}};

Answer 1

我还是不知道上一个程序出了什么问题。我重新编写了上面的程序，它的效果非常好。这是代码。希望这可以帮助任何遇到此问题的人。另外，如果有人知道上次出了什么问题，请分享您的想法。

var db; //database will be stored in this value when success is called
var movieDataToStore = [{ movieid: "1", name: "Keep my Storage Local", runtime:"60"},
            { movieid: "2", name: "Rich Internet Conversations", runtime:"45"},
            { movieid: "3", name: "Applications of the Rich and Famous", runtime:"30"},
            { movieid: "4", name: "All Jump All eXtreme", runtime:"45"}];

window.query = function() {
    db.transaction("movies").objectStore("movies").get("1").onsuccess = function(event) {
        alert("QUERY: CThe first movie is" + event.target.result.name);
    };};

window.onload = function() {
    if (!window.indexedDB) {
        window.alert("Your browser doesn't support a stable version of IndexedDB. Such and such feature will not be available.")
    }
else{
    var request = indexedDB.open("movies", 1);
    request.onerror = function(event) {
          alert("Seems like there is a kryptonite nearby.... Please Check back later");
};

    request.onsuccess = function(event) {
    db = this.result;
    query();
    };

    request.onupgradeneeded = function(event) {
         var db = event.target.result;
         if(db.objectStoreNames.contains("movies")) {
              db.deleteObjectStore("movies");
            }
         var objectStore = db.createObjectStore("movies", { keyPath: "movieid"});
         objectStore.createIndex("name", "name", { unique: false });
          objectStore.createIndex("runtime", "runtime", { unique: false });
          for (var i in movieDataToStore) {
                objectStore.add(movieDataToStore[i]);
              }
    };

        }   
};