followup to #bc03c509
There were 2 problems
1. VALUES was not properly getting multiple results ... we need (1),(2),(3)
not (1,2,3)
2. changes was mistakenly lazy evaluated eg `changed ||=` which meant some
queries were not running
* Remove unused method
* Prefabricate user in category_user_spec.rb
* FIX: Remove notification_level from category_users unique indexes
* FIX: CategoryUser#batch_set wasn't updating pre-existing records
* Improve tests for CategoryUser#batch_set
* FIX: changed was being reported incorrectly
* DEV: Rewrote query to do a bulk insert
* DEV: remove unnecessary parentheses
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
Introduce new patterns for direct sql that are safe and fast.
MiniSql is not prone to memory bloat that can happen with direct PG usage.
It also has an extremely fast materializer and very a convenient API
- DB.exec(sql, *params) => runs sql returns row count
- DB.query(sql, *params) => runs sql returns usable objects (not a hash)
- DB.query_hash(sql, *params) => runs sql returns an array of hashes
- DB.query_single(sql, *params) => runs sql and returns a flat one dimensional array
- DB.build(sql) => returns a sql builder
See more at: https://github.com/discourse/mini_sql
- present tags watched on the user prefs page
- automatically watch or unwatch old topics based on watch status
New watching and tracking logic takes care of handling old topics
(either with or without read state)
When you watch a topic you now watch historically
Also removes confusing warnings from user.
