javascript - 从桌面 Chrome IndexedDB 删除记录与从 Android Chrome IndexedDB 删除记录

Question

我正在尝试使用以下代码从 IndexedDB 中删除一条记录:

DB.indexedDB.IDBTransaction.READ_WRITE="readwrite";
window.indexedDB =  window.indexedDB || window.webkitIndexedDB || window.mozIndexedDB;

if ('webkitIndexedDB' in window) {
        window.IDBTransaction = window.webkitIDBTransaction;
        window.IDBKeyRange = window.webkitIDBKeyRange;
        DB.indexedDB.IDBTransaction.READ_WRITE=IDBTransaction.READ_WRITE;
    }

DB.indexedDB.idelete = function( storeName, indexValue, index, keyPathfield ){
    var db = DB.indexedDB.db;
    var transaction = db.transaction([storeName], DB.indexedDB.IDBTransaction.READ_WRITE);
    var store = transaction.objectStore(storeName);
    var sindex = store.index(index);

    sindex.get(indexValue).onsuccess = function (event){
        store.delete(event.target.result[keyPathfield]).onsuccess = function(event) {
            document.getElementById("result").innerHTML+="deleted<br>";
            };
        }
}

它调用onsuccess，但是当我添加具有相同indexValue的新记录并再次调用idelete并使用以下命令搜索记录时代码:

DB.indexedDB.readAll=function(storeName, index){
    var results=document.getElementById("result");
    var db = DB.indexedDB.db;
    var transaction = db.transaction([storeName]);
    var store = transaction.objectStore(storeName);
    var key = IDBKeyRange.lowerBound(0);
    var cursor = store.openCursor(key);
    var x=0;

    cursor.onsuccess = function(event){
        var result = event.target.result;
        if(result)
        {
            x++;
            var charx=x.toString();
            results.innerHTML+=charx+result.value[index]+"<br>";
            result.continue();
        }
        else 
        return;
}

如果我使用 Windows Chrome，记录会被正确删除。但如果我使用的是 Android Chrome 版本 M18.1，readAll 仍然可以找到该记录，但 idelete 无法删除它，因为它实际上已被删除。

Answer 1

只打开键游标而不是实际检索它怎么样。

sindex.openKeyCursor(indexValue).onsuccess = function (event){
    var cursor = event.target.result;
    if (cursor) {
      // cursor.delete(); 
      var key = cursor.key;
      var primaryKey = cursor.primaryKey;

      store.delete(primaryKey).onsuccess = function(event) {
        document.getElementById("result").innerHTML+= key + ' (' + primaryKey + ") deleted<br>";
        };
      }
    } else {
      document.getElementById("result").innerHTML+= indexValue + ' not found.<br>";
    }
}