# Lemmy v0.9.0 Release (2021-01-25) ## Changes Since our last release in October of last year, and we’ve had ~450 commits. The biggest changes, as we’ll outline below, are a re-work of Lemmy’s database structure, a v2 of Lemmy’s API, and activitypub compliance fixes. The new re-worked DB is much faster, easier to maintain, and now supports hierarchical rather than flat objects in the new API. We’ve also seen the first release of Lemmur, an android / iOS (soon) / windows / linux client, as well as Lemmer, a native iOS client. Much thanks to @krawieck, @shilangyu, and @uuttff8 for making these great clients. If you can, please contribute to their patreon to help fund lemmur development. ## LemmyNet projects ### Lemmy Server - Moved views from SQL to Diesel. This was a spinal replacement for much of lemmy. - Removed all the old fast_tables and triggers, and created new aggregates tables. - Added a v2 of the API to support the hierarchical objects created from the above changes. - Moved continuous integration to drone, now includes formatting, clippy, and cargo build checks, unit testing, and federation testing. Drone also deploys both amd64 and arm64 images to dockerhub. - Split out documentation into git submodule. - Shortened slur filter to avoid false positives. - Added query performance testing and comparisons. Added indexes to make sure every query is < 30 ms. - Added compilation time testing. ### Federation This release includes some bug fixes for federation, and some changes to get us closer to compliance with the ActivityPub standard. - Community bans now federating. - Local posts sometimes got marked as remote. - Creator of post/comment was not notified about new child comments. - Community deletion now federated. None of these are breaking changes, so federation between 0.9.0 and 0.8.11 will work without problems. ### Lemmy javascript / typescript client - Updated the lemmy-js-client to use the new v2 API. Our API docs now reference this project’s files, to show what the http / websocket forms and responses should look like. - Drone now handles publishing its npm packages. ### Lemmy-UI - Updated it to use the v2 API via lemmy-js-client, required changing nearly every component. - Added a live comment count. - Added drone deploying, and builds for ARM. - Fixed community link wrapping. - Community Titles are now used instead of names. - Various other bug fixes. ### Lemmy Docs - We moved documentation into a separate git repository, and support translation for the docs now! - Moved our code of conduct into the documentation. ## Upgrading If you’d like to make a DB backup before upgrading, follow this guide. - Upgrade with manual Docker installation - Upgrade with Ansible installation ## Known issues Some older self-comments are being marked as unread in your inbox, click Mark all as read to resolve this.