Andrei Prigorshnev fbd24fa6ae DEV: Allow chat mentions to have several notifications (#24874) ... This PR is a reworked version of https://github.com/discourse/discourse/pull/24670. In chat, we need the ability to have several notifications per `chat_mention`. Currently, we have one_to_one relationship between `chat_mentions` and `notifications`: d7a09fb08d/plugins/chat/app/models/chat/mention.rb (L9) We want to have one_to_many relationship. This PR implements that by introducing a join table between `chat_mentions` and `notifications`. The main motivation for this is that we want to solve some performance problems with mentions that we're having now. Let's say a user sends a message with @ all in a channel with 50 members, we do two things in this case at the moment: - create 50 chat_mentions - create 50 notifications We don't want to change how notifications work in core, but we want to be more efficient in chat, and create only 1 `chat_mention` which would link to 50 notifications. Also note, that on the side of notifications, having a lot of notifications is not so big problem, because notifications processing can be queued. Apart from improving performance, this change will make the code design better. Note that I've marked the old `chat_mention.notification_id` column as ignored, but I'm not deleting it in this PR. We'll delete it later in https://github.com/discourse/discourse/pull/24800.		2023-12-19 18:53:00 +04:00
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20230116090324_drop_chat_drafts_over_max_length.rb	SECURITY: Limit chat drafts length and preloaded count (#19987)	2023-01-25 13:50:10 +02:00
20230123025112_move_chat_uploads_to_upload_references_post.rb	DEV: Use UploadReference instead of ChatUpload in chat (#19947)	2023-01-24 13:28:21 +10:00
20230227172543_make_chat_mention_notification_id_nullable.rb	DEV: Always create chat mention records (#20470)	2023-03-07 19:07:11 +04:00
20230403012844_drop_chat_uploads.rb	DEV: Drop chat_uploads table and model and remove old references (#20926)	2023-04-04 09:13:39 +10:00
20230411023340_update_thread_reply_counts.rb	DEV: Chat thread reply counter cache (#21050)	2023-04-11 15:40:25 +10:00
20230710040640_backfill_chat_channel_and_thread_last_message_ids_post_migrate.rb	DEV: Add last_message_id to channel and thread (#22488)	2023-07-13 10:28:11 +10:00
20231214180002_update_relationship_between_chat_mentions_and_notifications_post_migrate.rb	DEV: Allow chat mentions to have several notifications (#24874)	2023-12-19 18:53:00 +04:00