Rails 6: ActiveRecord

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1. NIKOLAY SVERCHKOV @ssnickolay ACTIVE RECORD 6+
2. #saintprubyconf @ssnickolay
3. @ssnickolay RAILS 6.0 MULTIPLE DATABASE SUPPORT
4. @ssnickolay gem ‘octopus’
5. @ssnickolay gem ‘octopus’ FOCUSED ON
6. @ssnickolay RAILS 6.0: MULTI DB MULTI DB = DB SHARDING = + + + VERTICAL OR HORIZONTAL PARTITIONING / REPLICATION
7. @ssnickolay RAILS 6.0: MULTI DB RAILS DID NOT HAVE ADEQUATE* MULTI DB SUPPORT *https://github.com/ankane/multiverse
8. @ssnickolay RAILS 6.0: MULTI DB MULTI DB !!= DATABASE SHARDING
9. @ssnickolay AT LEAST 12 HUGE PRS FROM @EILEENCODES RAILS 6.0: MULTI DB
10. WHEN YOU RELEASE THE NEW FEATURE
11. @ssnickolay RAILS 6.0: MULTI DB MULTI DB !!= DATABASE SHARDING ?
12. @ssnickolay RAILS 6.0: MULTI DB MULTI DB !!= DATABASE SHARDING
13. @ssnickolay RAILS 6.0: BULK INSERTS # Insert multiple records, performing an upsert # when records have duplicate ISBNs Book.upsert_all([ { title: 'Rework', author: 'David', isbn: '1' }, { title: 'Eloquent Ruby', author: 'Russ', isbn: '1' } ], unique_by: { columns: %w[ isbn ] }) *gem ‘activerecord-import`
14. @ssnickolay RAILS 6.0: update Rails 4.0.2 update_attributes(column: value) update(column: value) Rails 6+ update(column: value) Deprecate `update_attributes`
15. @ssnickolay RAILS 6.0: update Rails 4.0.2 update_attributes(column: value) update(column: value) Rails 6+ update(column: value) Deprecate `update_attributes`
16. @ssnickolay RAILS 6.0: create_or_find_by find_or_create_by vs create_or_find_by
17. @ssnickolay find_or_create_by def find_or_create_by!(attributes, &block) find_by(attributes) !|| create!(attributes, &block) end
18. @ssnickolay find_or_create_by def find_or_create_by!(attributes, &block) find_by(attributes) !|| <Вот-Тут-> create!(attributes, &block) end
19. @ssnickolay RAILS 6.0: create_or_find_by def create_or_find_by(attributes, &block) transaction(requires_new: true) { create(attributes, &block) } rescue ActiveRecord!::RecordNotUnique find_by!(attributes) end
20. @ssnickolay RAILS 6.0: create_or_find_by def create_or_find_by(attributes, &block) transaction(requires_new: true) { create(attributes, &block) } rescue ActiveRecord!::RecordNotUnique <Вот-Тут-> find_by!(attributes) end
21. @ssnickolay RAILS 6.0: Other • Make t.timestamps with precision by default • Add support for UNLOGGED Postgresql tables • Add support for annotating queries generated by ActiveRecord::Relation with SQL comments • Make it possible to override the implicit order column • …