Rails 6: ActiveRecord

NIKOLAY SVERCHKOV @ssnickolay ACTIVE RECORD 6+

#saintprubyconf @ssnickolay

@ssnickolay RAILS 6.0 MULTIPLE DATABASE SUPPORT

@ssnickolay gem ‘octopus’

@ssnickolay gem ‘octopus’ FOCUSED ON

@ssnickolay RAILS 6.0: MULTI DB MULTI DB = DB SHARDING
= + + + VERTICAL OR HORIZONTAL PARTITIONING / REPLICATION

@ssnickolay RAILS 6.0: MULTI DB RAILS DID NOT HAVE ADEQUATE*
MULTI DB SUPPORT *https://github.com/ankane/multiverse

@ssnickolay RAILS 6.0: MULTI DB MULTI DB !!= DATABASE SHARDING

@ssnickolay AT LEAST 12 HUGE PRS FROM @EILEENCODES RAILS 6.0:
MULTI DB

WHEN YOU RELEASE THE NEW FEATURE

?

@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`

@ssnickolay RAILS 6.0: update Rails 4.0.2 update_attributes(column: value) update(column: value)
Rails 6+ update(column: value) Deprecate `update_attributes`

@ssnickolay RAILS 6.0: create_or_ﬁnd_by find_or_create_by vs create_or_find_by

@ssnickolay ﬁnd_or_create_by def find_or_create_by!(attributes, &block) find_by(attributes) !|| create!(attributes, &block) end

@ssnickolay ﬁnd_or_create_by def find_or_create_by!(attributes, &block) find_by(attributes) !|| <Вот-Тут-> create!(attributes, &block)
end

@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

@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

@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 • …

Rails 6: ActiveRecord

Rails 6: ActiveRecord

Nikolay Sverchkov

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NIKOLAY SVERCHKOV @ssnickolay ACTIVE RECORD 6+

#saintprubyconf @ssnickolay

@ssnickolay RAILS 6.0 MULTIPLE DATABASE SUPPORT

@ssnickolay gem ‘octopus’

@ssnickolay gem ‘octopus’ FOCUSED ON

@ssnickolay RAILS 6.0: MULTI DB MULTI DB = DB SHARDING

@ssnickolay RAILS 6.0: MULTI DB RAILS DID NOT HAVE ADEQUATE*

@ssnickolay RAILS 6.0: MULTI DB MULTI DB !!= DATABASE SHARDING

@ssnickolay AT LEAST 12 HUGE PRS FROM @EILEENCODES RAILS 6.0:

WHEN YOU RELEASE THE NEW FEATURE

@ssnickolay RAILS 6.0: MULTI DB MULTI DB !!= DATABASE SHARDING

@ssnickolay RAILS 6.0: MULTI DB MULTI DB !!= DATABASE SHARDING

@ssnickolay RAILS 6.0: BULK INSERTS # Insert multiple records, performing

@ssnickolay RAILS 6.0: update Rails 4.0.2 update_attributes(column: value) update(column: value)

@ssnickolay RAILS 6.0: update Rails 4.0.2 update_attributes(column: value) update(column: value)

@ssnickolay RAILS 6.0: create_or_ﬁnd_by find_or_create_by vs create_or_find_by

@ssnickolay ﬁnd_or_create_by def find_or_create_by!(attributes, &block) find_by(attributes) !|| create!(attributes, &block) end

@ssnickolay ﬁnd_or_create_by def find_or_create_by!(attributes, &block) find_by(attributes) !|| <Вот-Тут-> create!(attributes, &block)

@ssnickolay RAILS 6.0: create_or_ﬁnd_by def create_or_find_by(attributes, &block) transaction(requires_new: true) {

@ssnickolay RAILS 6.0: create_or_ﬁnd_by def create_or_find_by(attributes, &block) transaction(requires_new: true) {

@ssnickolay RAILS 6.0: Other • Make t.timestamps with precision by