如何在HTML 5中设置索引数据库的版本

Question

我正在创建一个HTML 5 Web应用程序，我在本地存储上使用索引数据库，我在HTML 5索引数据库中设置数据库版本时遇到问题
代码片段如下

try {
                var request = iDB.open('travelDB', dbVersion);
                request.onerror = function (event) { errorDisplay('Failed to open IndexedDB database.'); }
                request.onsuccess = function (event) {
                    db = request.result;  // set the global db variable


                    db.onerror = dbErrorHandler;



                    alert(db.version != dbNewVersion);
                    if (db.version != dbNewVersion) {
                        alert('game begins');
                        db.setVersion(dbNewVersion);  
                       // var req = db.setAttribute(version, dbNewVersion);
                        alert('game ends');
                        req.onerror = function (event) { alert('version error: ' + event.target.errorCode); }
                        req.onsuccess = function (event) {
                            alert('Creating the object store');
                            var objectStore = db.createObjectStore('oTravel', { keyPath: 'id', autoIncrement: true });
                            objectStore.createIndex('traveler', 'ciTraveler', { unique: false });
                        }
                    }
                }
            } catch (e) {
                dispError('Browser supports IndexedDB but didn\'t open the database. (' + e.message + ')');
            }

Answer 1

我相信setVersion已被弃用。只需为indexedDB.open指定一个较新的版本，并使用onupgradeneeded回调来执行升级。