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Code Issues Projects Releases Packages Wiki Activity

Simplify DB upgrade

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This commit is contained in:
Ming Ming 2021-06-15 17:24:38 +08:00
parent fd95e459b8
commit 9297686a6e
1 changed files with 13 additions and 16 deletions
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29
lib/app_db.dart
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@ -45,34 +45,31 @@ class AppDb {
final db = event.database;
ObjectStore fileStore, albumStore, fileDbStore;
if (event.oldVersion < 1) {
fileStore = db.createObjectStore(fileStoreName);
albumStore = db.createObjectStore(albumStoreName);
} else {
fileStore = event.transaction.objectStore(fileStoreName);
albumStore = event.transaction.objectStore(albumStoreName);
}
if (event.oldVersion < 2) {
// version 2 store things in a new way, just drop all
await fileStore.clear();
await albumStore.clear();
fileStore.createIndex(AppDbFileEntry.indexName, AppDbFileEntry.keyPath);
try {
db.deleteObjectStore(albumStoreName);
} catch (_) {}
albumStore = db.createObjectStore(albumStoreName);
albumStore.createIndex(
AppDbAlbumEntry.indexName, AppDbAlbumEntry.keyPath);
}
if (event.oldVersion < 3) {
// new object store in v3
try {
db.deleteObjectStore(fileDbStoreName);
} catch (_) {}
fileDbStore = db.createObjectStore(fileDbStoreName);
fileDbStore.createIndex(
AppDbFileDbEntry.indexName, AppDbFileDbEntry.keyPath,
unique: false);
// drop files
// ObjectStore.clear is bugged when there's index created on Android
final cursor = fileStore.openKeyCursor(autoAdvance: true);
await for (final k in cursor) {
await fileStore.delete(k.primaryKey);
}
// recreate file store from scratch
try {
db.deleteObjectStore(fileStoreName);
} catch (_) {}
fileStore = db.createObjectStore(fileStoreName);
fileStore.createIndex(AppDbFileEntry.indexName, AppDbFileEntry.keyPath);
}
});
}