getAll()
metodu IDBIndex
Arabirimi, dizinin içindeki tüm nesneleri alır.
Nesne tembel olarak oluşturulduğundan, bir imlecin value özelliğine bakmakla ilişkili bir performans maliyeti söz konusudur. GetAll () gibi bir özellik kullanmak için, tarayıcının tüm nesneleri aynı anda oluşturması gerekir. Örneğin sadece anahtarların her birine bakmak istiyorsanız, bir imleci kullanmak daha etkilidir. Ancak, bir nesne deposundaki tüm nesnelerin bir dizisini almaya çalışıyorsanız, getAll () kullanmalısınız.
Syntax
var getAllKeysRequest = IDBIndex.getAll(); var getAllKeysRequest = IDBIndex.getAll(query); var getAllKeysRequest = IDBIndex.getAll(query, count);
Parametreler
- query Optional
- A key or an
IDBKeyRange
identifying the records to retrieve. If this value is null or missing, the browser will use an unbound key range. - count Optional
- The number records to return. If this value exceeds the number of records in the query, the browser will only retrieve the first item. If it is lower than
0
or greater than232-1
aTypeError
exception will be thrown.
Return value
An IDBRequest
object on which subsequent events related to this operation are fired.
Exceptions
This method may raise a DOMException
of the following types:
Exception | Description |
---|---|
TransactionInactiveError |
This IDBIndex 's transaction is inactive. |
InvalidStateError |
The IDBIndex has been deleted or removed. |
A TypeError
exception is thrown if the count
parameter is not between 0
and 232-1
included.
Example
var myIndex = objectStore.index('index');
var getAllKeysRequest = myIndex.getAllKeys();
getAllKeysRequest.onsuccess = function() {
console.log(getAllKeysRequest.result);
}
Specification
Specification | Status | Comment |
---|---|---|
Indexed Database API 2.0 The definition of 'getAll()' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 48 | 44.0 (44.0) [1] | No support | 35 | No support |
Indexed Database 2.0 | 58 | ? | ? | 45 | ? |
Feature | Android Webview | Chrome for Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | 48 | 48 | 44.0 (44.0) [1] | No support | 35 | No support |
Indexed Database 2.0 | 58 | 58 | ? | ? | 45 | ? |
[1] This feature was available since Firefox 24, but behind the dom.indexedDB.experimental
pref, off by default
See also
- Using IndexedDB
- Starting transactions:
IDBDatabase
- Using transactions:
IDBTransaction
- Setting a range of keys:
IDBKeyRange
- Retrieving and making changes to your data:
IDBObjectStore
- Using cursors:
IDBCursor
- Reference example: To-do Notifications (view example live.)