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Diffstat (limited to 'activerecord/CHANGELOG.md')
-rw-r--r-- | activerecord/CHANGELOG.md | 130 |
1 files changed, 128 insertions, 2 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 2551841aaf..faab0f9554 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,121 @@ +* Rework `ActiveRecord::Relation#last` + + 1. Always find last with ruby if relation is loaded + 2. Always use SQL instead if relation is not loaded. + 3. Deprecated relation loading when SQL order can not be automatically reversed + + Topic.order("title").load.last(3) + # before: SELECT ... + # after: No SQL + + Topic.order("title").last + # before: SELECT * FROM `topics` + # after: SELECT * FROM `topics` ORDER BY `topics`.`title` DESC LIMIT 1 + + Topic.order("coalesce(author, title)").last + # before: SELECT * FROM `topics` + # after: Deprecation Warning for irreversible order + + *Bogdan Gusiev* + +* `ActiveRecord::Relation#reverse_order` throws `ActiveRecord::IrreversibleOrderError` + when the order can not be reversed using current trivial algorithm. + Also raises the same error when `#reverse_order` is called on + relation without any order and table has no primary key: + + Topic.order("concat(author_name, title)").reverse_order + # Before: SELECT `topics`.* FROM `topics` ORDER BY concat(author_name DESC, title) DESC + # After: raises ActiveRecord::IrreversibleOrderError + Edge.all.reverse_order + # Before: SELECT `edges`.* FROM `edges` ORDER BY `edges`.`` DESC + # After: raises ActiveRecord::IrreversibleOrderError + + *Bogdan Gusiev* + +* Improve schema_migrations insertion performance by inserting all versions + in one INSERT SQL. + + *Akira Matsuda*, *Naoto Koshikawa* + +* Using `references` or `belongs_to` in migrations will always add index + for the referenced column by default, without adding `index: true` option + to generated migration file. Users can opt out of this by passing + `index: false`. + + Fixes #18146. + + *Matthew Draper*, *Prathamesh Sonpatki* + +* Run `type` attributes through attributes API type-casting before + instantiating the corresponding subclass. This makes it possible to define + custom STI mappings. + + Fixes #21986. + + *Yves Senn* + +* Don't try to quote functions or expressions passed to `:default` option if + they are passed as procs. + + This will generate proper query with the passed function or expression for + the default option, instead of trying to quote it in incorrect fashion. + + Example: + + create_table :posts do |t| + t.datetime :published_at, default: -> { 'NOW()' } + end + + *Ryuta Kamizono* + +* Fix regression when loading fixture files with symbol keys. + + Fixes #22584. + + *Yves Senn* + +* Use `version` column as primary key for schema_migrations table because + `schema_migrations` versions are guaranteed to be unique. + + This makes it possible to use `update_attributes` on models that do + not have a primary key. + + *Richard Schneeman* + +* Add short-hand methods for text and blob types in MySQL. + + In Pg and Sqlite3, `:text` and `:binary` have variable unlimited length. + But in MySQL, these have limited length for each types (ref #21591, #21619). + This change adds short-hand methods for each text and blob types. + + Example: + + create_table :foos do |t| + t.tinyblob :tiny_blob + t.mediumblob :medium_blob + t.longblob :long_blob + t.tinytext :tiny_text + t.mediumtext :medium_text + t.longtext :long_text + end + + *Ryuta Kamizono* + +* Take into account UTC offset when assigning string representation of + timestamp with offset specified to attribute of time type. + + *Andrey Novikov* + +* When calling `first` with a `limit` argument, return directly from the + `loaded?` records if available. + + *Ben Woosley* + +* Deprecate sending the `offset` argument to `find_nth`. Please use the + `offset` method on relation instead. + + *Ben Woosley* + ## Rails 5.0.0.beta1 (December 18, 2015) ## * Order the result of `find(ids)` to match the passed array, if the relation @@ -43,6 +161,14 @@ defaults without breaking existing migrations, or forcing them to be rewritten through a deprecation cycle. + New migrations specify the Rails version they were written for: + + class AddStatusToOrders < ActiveRecord::Migration[5.0] + def change + # ... + end + end + *Matthew Draper*, *Ravil Bayramgalin* * Use bind params for `limit` and `offset`. This will generate significantly @@ -568,7 +694,7 @@ * Add `ActiveRecord::Relation#in_batches` to work with records and relations in batches. - Available options are `of` (batch size), `load`, `begin_at`, and `end_at`. + Available options are `of` (batch size), `load`, `start`, and `finish`. Examples: @@ -1216,7 +1342,7 @@ *Yves Senn* -* `find_in_batches` now accepts an `:end_at` parameter that complements the `:start` +* `find_in_batches` now accepts an `:finish` parameter that complements the `:start` parameter to specify where to stop batch processing. *Vipul A M* |