Question

我有大量数据需要将其插入indexedDB数据库。

数据大小约为5MB。

超过77,000行。

我将数据库转换为“all.js”文件，如下所示： -

const AllData = [
{ id: 1, en: "10th", ar: "arabic word" },
{ id: 2, en: "1st", ar: "arabic word" },
{ id: 3, en: "2nd", ar: "arabic word" },
{ id: 4, en: "3rd", ar: "arabic word" },
{ id: 5, en: "4th", ar: "arabic word" },
{ id: 6, en: "5th", ar: "arabic word" },
{ id: 7, en: "6th", ar: "arabic word" },
{ id: 8, en: "7th", ar: "arabic word" },
{ id: 9, en: "8th", ar: "arabic word" },

to about 77,000


];

以及我在HTML和JavaScript中的代码

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">

<script src="all.js" type="text/javascript"></script>


<script type="text/javascript">
/*
var custom = [
    {"id":1 ,"name":"hussein","email":"test@gmail.com"},
    {"id":2 ,"name":"ali","email":"test2@gmail.com"}

];
*/

var db;
var request = window.indexedDB.open("YesData13", 1);




request.onerror = function(event) {
  alert("Why didn't you allow my web app to use IndexedDB?!");
};


request.onsuccess = function(event) {
  db = event.target.result;





/*

var transaction = db.transaction(["data"], "readwrite");



transaction.oncomplete = function(event) {
  alert("All done!");
};


transaction.onerror = function(event) {
  // Don't forget to handle errors!
};




var objectStore = transaction.objectStore("data");




for (var i in AllData) {
  var request = objectStore.add(AllData[i]);
  request.onsuccess = function(event) {
    // event.target.result == customerData[i].ssn;
  };
}


*/


};






request.onupgradeneeded = function(event) { 
  var db = event.target.result;


  var objectStore = db.createObjectStore("data", { keyPath: "id" });
  //objectStore.createIndex("en","en",{unique:true});
  //objectStore.createIndex("ar","ar",{unique:false});


  for (var i in AllData){
    objectStore.put(AllData[i])

  }



};









/*
for (var i in AllData) {
  var request = objectStore.add(AllData[i]);
  request.onsuccess = function(event) {
    // event.target.result == customerData[i].ssn;
  };
}
*/





    function read() {
        var transaction = db.transaction(["data"]);
        var objectStore = transaction.objectStore("data");
        var request = objectStore.get(25001);
        request.onerror = function(event) {
          alert("Unable to retrieve daa from database!");
        };
        request.onsuccess = function(event) {
          // Do something with the request.result!
          if(request.result) {
            alert("id: " + request.result.id + ", English: " + request.result.en + ", arabic: " + request.result.ar);
          } else {
            alert("Kenny couldn't be found in your database!");  
          }
        };
    }




</script>
</head>

点击这里

上面的代码在firefox和google chrome中运行良好，并插入了所有行。但是当在firefox os模拟器中尝试它时它没有工作，并且当尝试将行减少到25,000时它工作正常。

我尝试将其拆分为每个文件大约25000个文件，只添加了25,000个，但未添加25,000个

Answer 1

根据我在firefox os上使用indexedDB进行的实验，似乎模拟器对indexedDB可以存储的数据量施加了相当小的限制。我尝试编写一个脚本来将一堆随机数据添加到单个数据库中，并且模拟器没有给我一个错误，但它停止了允许我在大约12,000个条目后添加数据。但是，如果我尝试使用模拟器创建一个新数据库，它会给我一个错误，说超出配额。

然而，当我在手机上运行这一切时，它只是继续前进和运行，我怀疑模拟器不能代表实际设备，因为firefox应用程序据称不会强加indexedDB限制。因此，如果您可以进行测试，那么您的应用应该可以在设备上运行。

Firefox OS中的大量数据到indexedDB中

1 个答案: