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-rw-r--r--packages/idb-bridge/src/MemoryBackend.test.ts37
-rw-r--r--packages/idb-bridge/src/MemoryBackend.ts30
-rw-r--r--packages/idb-bridge/src/util/cmp.ts2
3 files changed, 57 insertions, 12 deletions
diff --git a/packages/idb-bridge/src/MemoryBackend.test.ts b/packages/idb-bridge/src/MemoryBackend.test.ts
index c882b9760..b5bc5dad2 100644
--- a/packages/idb-bridge/src/MemoryBackend.test.ts
+++ b/packages/idb-bridge/src/MemoryBackend.test.ts
@@ -151,6 +151,43 @@ test("Spec: Example 1 Part 3", async t => {
cursor = request4.result;
t.is(cursor.value.isbn, 123456);
+ cursor.continue();
+
+ await promiseFromRequest(request4);
+
+ cursor = request4.result;
+ t.is(cursor.value.isbn, 234567);
+
+ cursor.continue();
+
+ await promiseFromRequest(request4);
+
+ cursor = request4.result;
+ t.is(cursor.value.isbn, 345678);
+
+ cursor.continue();
+ await promiseFromRequest(request4);
+
+ cursor = request4.result;
+
+ t.is(cursor, null);
+
+ const tx5 = db.transaction("books", "readonly");
+ const store5 = tx5.objectStore("books");
+ const index5 = store5.index("by_author");
+
+ const request5 = index5.openCursor(null, "next");
+
+ await promiseFromRequest(request5);
+ cursor = request5.result;
+ t.is(cursor.value.author, "Barney");
+ cursor.continue();
+
+ await promiseFromRequest(request5);
+ cursor = request5.result;
+ t.is(cursor.value.author, "Fred");
+ cursor.continue();
+
db.close();
t.pass();
diff --git a/packages/idb-bridge/src/MemoryBackend.ts b/packages/idb-bridge/src/MemoryBackend.ts
index 75e583a89..c72431f28 100644
--- a/packages/idb-bridge/src/MemoryBackend.ts
+++ b/packages/idb-bridge/src/MemoryBackend.ts
@@ -747,7 +747,11 @@ export class MemoryBackend implements Backend {
}
}
- let indexEntry;
+ if (indexPos === undefined || indexPos === null) {
+ indexPos = forward ? indexData.minKey() : indexData.maxKey();
+ }
+
+ let indexEntry: IndexRecord | undefined;
indexEntry = indexData.get(indexPos);
if (!indexEntry) {
const res = indexData.nextHigherPair(indexPos);
@@ -756,22 +760,19 @@ export class MemoryBackend implements Backend {
}
}
- if (!indexEntry) {
- // We're out of luck, no more data!
- return { count: 0, primaryKeys: [], indexKeys: [], values: [] };
- }
-
let primkeySubPos = 0;
// Sort out the case where the index key is the same, so we have
// to get the prev/next primary key
if (
+ indexEntry !== undefined &&
req.lastIndexPosition !== undefined &&
compareKeys(indexEntry.indexKey, req.lastIndexPosition) === 0
) {
let pos = forward ? 0 : indexEntry.primaryKeys.length - 1;
+ console.log("number of primary keys", indexEntry.primaryKeys.length);
// Advance past the lastObjectStorePosition
- while (pos >= 0 && pos < indexEntry.primaryKeys.length) {
+ do {
const cmpResult = compareKeys(
req.lastObjectStorePosition,
indexEntry.primaryKeys[pos],
@@ -780,7 +781,8 @@ export class MemoryBackend implements Backend {
break;
}
pos += forward ? 1 : -1;
- }
+ } while (pos >= 0 && pos < indexEntry.primaryKeys.length);
+
// Make sure we're at least at advancedPrimaryPos
while (
primaryPos !== undefined &&
@@ -797,10 +799,12 @@ export class MemoryBackend implements Backend {
pos += forward ? 1 : -1;
}
primkeySubPos = pos;
- } else {
+ } else if (indexEntry !== undefined) {
primkeySubPos = forward ? 0 : indexEntry.primaryKeys.length - 1;
}
+ console.log("pos=", primkeySubPos);
+
while (1) {
if (req.limit != 0 && numResults == req.limit) {
break;
@@ -811,14 +815,19 @@ export class MemoryBackend implements Backend {
if (!range.includes(indexPos)) {
break;
}
+ if (indexEntry === undefined) {
+ break;
+ }
if (
primkeySubPos < 0 ||
primkeySubPos >= indexEntry.primaryKeys.length
) {
+ console.log("moving subkey forward");
primkeySubPos = forward ? 0 : indexEntry.primaryKeys.length - 1;
const res = indexData.nextHigherPair(indexPos);
if (res) {
indexPos = res[1].indexKey;
+ indexEntry = res[1];
} else {
break;
}
@@ -866,10 +875,11 @@ export class MemoryBackend implements Backend {
// Advance store position if we are either still at the last returned
// store key, or if we are currently not on a key.
const storeEntry = storeData.get(storePos);
+ console.log("store entry:", storeEntry);
if (
!storeEntry ||
(req.lastObjectStorePosition !== undefined &&
- compareKeys(req.lastObjectStorePosition, storeEntry.primaryKey))
+ compareKeys(req.lastObjectStorePosition, storePos) === 0)
) {
storePos = storeData.nextHigherKey(storePos);
}
diff --git a/packages/idb-bridge/src/util/cmp.ts b/packages/idb-bridge/src/util/cmp.ts
index 078c0a9bd..9d0dc99a2 100644
--- a/packages/idb-bridge/src/util/cmp.ts
+++ b/packages/idb-bridge/src/util/cmp.ts
@@ -39,8 +39,6 @@ const getType = (x: any) => {
// https://w3c.github.io/IndexedDB/#compare-two-keys
const compareKeys = (first: any, second: any): -1 | 0 | 1 => {
- console.log("comparing keys", first, second);
-
if (second === undefined) {
throw new TypeError();
}