ActiveRecord is Still Magical

on YouTube ↗42m

" summary

A walk through concrete ActiveRecord behaviors: failing tests due to deterministic test order (3,684 tests run), a surprising has_many through where+create bug that inserts only the child because a CollectionProxy becomes a Relation, default_scope quirks and how unscoped or build_default_scope behaves, differences in where-merging between Rails 3 and 4, autosave and inverse_of identity fixes, and a Rails 4 merge/joins implementation that fixes broken scope merging; patches and test advice for multiple databases are discussed.

AI-written summary · about

" chapters (6)

1. 0:00Start
2. 15:08Accept Method
3. 19:08Build Default Scope
4. 21:16Eagle Load
5. 21:35Include
6. 24:07Auto Save

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