Javascript IndexedDB:多次使用方法add执行函数-无新的DB条目
我创建了一个函数,用于在索引数据库中存储数据:Javascript IndexedDB:多次使用方法add执行函数-无新的DB条目,javascript,sapui5,indexeddb,Javascript,Sapui5,Indexeddb,我创建了一个函数,用于在索引数据库中存储数据: var request = window.indexedDB.open("mynewDB", 1); request.onupgradeneeded = function(event) { var db = event.target.result; var objectStore = db.createObjectStore("toDoList", {keyPath: 'key', autoIncr
var request = window.indexedDB.open("mynewDB", 1);
request.onupgradeneeded = function(event) {
var db = event.target.result;
var objectStore = db.createObjectStore("toDoList", {keyPath: 'key', autoIncrement: true});
var txn = event.target.transaction;
var addRequest = txn.objectStore("toDoList").add({value: storagedata});
}
仅供参考:storagedata使用base64字符串填充
如果通过按钮执行此函数,则变量storagedata的内容位于IndexedDB中。但如果我想再次按下按钮将另一个值存储到IndexedDB中,则不会发生任何事情
除此之外,如果我在第二次执行函数时,函数在line request.onupgradeneeded=functionevent{中跳转到文件intervalTrigger-dbg.js的超时,以编写cleartimoutthis.\u delayedCallId
我是如何解决这个问题的:在浏览器中调试并阅读了大量关于indexeddb的文档。我自己解决了这个问题。 对于每个想了解其工作原理的人:
var request = window.indexedDB.open("yourDB-1", 1);
var db;
var transaction;
var store;
request.onupgradeneeded = function(event) {
var db = event.target.result;
var transaction = event.target.transaction;
var store = db.createObjectStore("yourDB", {keyPath: 'key', autoIncrement: true});
}
request.onerror = function (event) {
console.log("Here is a error: " + event.target.errorCode);
}
request.onsuccess = function (event) {
db = request.result;
transaction = db.transaction("yourDB", "readwrite");
store = transaction.objectStore("yourDB");
db.onerror = function(event){
console.log("ERROR" + event.target.errorCode);
}
store.put({value: storagedata});
transaction.complete = function() {
db.close();
}
}