IndexedDB - 带有 IDBKeyRange 的 IDBObjectStore.get - 请求只返回单个对象？

Question

According to documentation :

 var request = objectStore.get(key);

Parameters

key

• The key or key range that identifies the record to be retrieved.

So I expect that when I call get with a key range, eg IDBKeyRange.bound(0, 4) , I should somehow receive four values when the request succeeds? But I only see a single value (tested in Chromium). Is this wrong documentation or wrong implementation, or am I missing a way to access all results without doing multiple requests?

Answer 1

get(query)

The query parameter may be a key or an IDBKeyRange identifying the record to be retrieved. If a range is specified, the method retrieves the first existing value in that range .

-- IndexedDB API 2.0 - W3C

* Emphasis mine.

To get all the values, use IDBObjectStore.getAll() instead of .get() or IDBObjectStore.openCursor() :

 function displayData() { var keyRangeValue = IDBKeyRange.bound("A", "F"); var transaction = db.transaction(['fThings'], 'readonly'); var objectStore = transaction.objectStore('fThings'); objectStore.openCursor(keyRangeValue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listItem = document.createElement('li'); listItem.innerHTML = '<strong>' + cursor.value.fThing + '</strong>, ' + > cursor.value.fRating; list.appendChild(listItem); cursor.continue(); } else { console.log('Entries all displayed.'); } }; }

-- IDBKeyRange - Web APIs | MDN