--- url: /changelog/core.md --- # Changelog for [`@signaldb/core`](https://www.npmjs.com/package/@signaldb/core) ### Added * Added the previous state (before the update) as an argument to `'changed'` event handlers. This provides additional information to handlers, enabling e.g. history functionality (thanks @robot-controller!) ## \[1.8.1] - 2026-03-17 ### Fixed * Filter out gone items when getting items from index. This fixes a bug where items that were removed from the collection but were still present in the index and lead to an exception when trying to get the item from the collection. ## \[1.8.0] - 2026-03-13 ### Added * Introduced the `transformAll` option when creating a `Collection`. This allows you to define a function that transform items after they are retrieved from persistence, enabling the integration of data from other collections or external sources (thanks @signalize!) * Added `Collection.resetData()` to clear in-memory state and reload data from the persistence adapter. ### Fixed * Fixed a race condition in SyncManager.dispose() that could cause unhandled "Collection is disposed" errors during organization/context switches while sync operations were still in flight (thanks @shajan-journal!) ## \[1.7.2] - 2026-01-07 ### Changed * Upgraded mingo dependency to v7 ## \[1.7.1] - 2025-08-25 ### Fixed * Fixed index info for `$or` queries with mixed indexed and non-indexed fields ## \[1.7.0] - 2025-07-08 ### Added * Type safety for modifiers in `updateOne`, `updateMany`, and `replaceOne` methods ### Fixed * Fixed a bug where nested array parts where not resolved correctly * Removed non-working `$text` operator from query selector type * Fixed function signature for `$where` operator ## \[1.6.0] - 2025-05-12 ### Added * Introduced `primaryKeyGenerator`. A function that generates a unique ID for the item. If not provided, a default generator will be used (thanks @signalize!) ### Fixed * Improve performance of checking id index * Export `Cursor` type ### Changed * Leverage null and undefined values for indexing ## \[1.5.4] - 2025-05-02 ### Fixed * Fixed a bug where the index wasn't filtered correctly when it was outdated ## \[1.5.3] - 2025-05-02 ### Changed * deep clone items before modifying them ## \[1.5.2] - 2025-04-04 ### Changed * Export `DotNotation` and `GetType` types (thanks @maxfriedmann!) ## \[1.5.1] - 2025-04-01 ### Fixed * Add missing scope check for internal signals ## \[1.5.0] - 2025-03-26 ### Added * Introduce `validation` event to allow schema validation of items in collections. ## \[1.4.0] - 2025-03-19 ### Added * Implemented `{ upsert: true }` option for `updateOne` and `updateMany` methods. * Implemented `replaceOne` method. ### Changed * Check for already existing ids in `updateMany` ### Fixed * Fixed checking for existing ids in `updateOne` and `updateMany`. There was a bug that made it impossible to update the id of an item. ## \[1.3.1] - 2025-02-19 ### Changed * Improved index query performance ## \[1.3.0] - 2025-02-18 ### Added * Implement exclusion of specific items when querying indices (when a selector contains `$nin` or `$ne`) ### Fixed * Emit `getItems` event on collections regardless of an index hit ### Removed * Removed auto-loading of developer tools and moved the loading to the `@signaldb/devtools` package. To load the developer tools, you now need to import `@signaldb/devtools` somewhere in your frontend code. Make sure that it doesn't get imported when running your code in production mode. ## \[1.2.4] - 2025-02-17 ### Changed * Improved type checking of selectors ## \[1.2.3] - 2025-02-11 ### Changed * Replace EventTarget-based emitter with a native implementation (thanks @Jordan-Mysten) ## \[1.2.2] - 2025-02-03 ### Fixed * Fixed check if `@signaldb/devtools` package is available for some environments (addition to [#1359](https://github.com/maxnowack/signaldb/issues/1359)) ## \[1.2.1] - 2025-02-01 ### Fixed * Fixed a bug where the build environment was complaining about missing `@signaldb/devtools` package ([#1359](https://github.com/maxnowack/signaldb/issues/1359)) ### Added * Enabled type checking in query selectors ## \[1.2.0] - 2025-01-13 ### Added * `isReady` method on `Collection` to wait for the collection to be ready ### Changed * Don't load developer tools automatically in production (thanks @lorof) ## \[1.1.0] - 2025-01-10 ### Added * Support for @signaldb/devtools * Allow specifying a name for a collection * Added `Collections.onCreation` method to listen for collection creation * Added `Collections.onDispose` method to listen for collection disposal * Added `Collections.getCollections` method to get all collections ### Changed * Switched from native EventEmitter to custom class that is based on EventTarget * Remove all listeners when disposing a collection ## \[1.0.0] - 2024-12-16 ### Added * Added JSDoc comments to all public APIs * Added method to globally configure field tracking * Added method for configuring field tracking on a collection * Allow configuring field tracking in collection options ### Removed * BREAKING: `createLocalStorageAdapter` was moved to `@signaldb/localstorage` * BREAKING: `createOPFSAdapter` was moved to `@signaldb/opfs` * BREAKING: `createFilesystemAdapter` was moved to `@signaldb/fs` * BREAKING: `PersistentCollection` was removed entirely * BREAKING: `SyncManager` was moved to `@signaldb/sync` * BREAKING: `ReplicatedCollection` was removed entirely * BREAKING: `options` parameter was removed from `combinePersistenceAdapters` * BREAKING: support for old `IndexProviders` was removed