1 files changed, 259 insertions, 7 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 17b71199aa..078d63f8f2 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,255 @@
+*   PostgreSQL support default values for enum types. Fixes #7814.
+
+    *Yves Senn*
+
+*   PostgreSQL `default_sequence_name` respects schema. Fixes #7516.
+
+    *Yves Senn*
+
+*   Fixed `columns_for_distinct` of postgresql adapter to work correctly
+    with orders without sort direction modifiers.
+
+    *Nikolay Kondratyev*
+
+*   PostgreSQL `reset_pk_sequence!` respects schemas. Fixes #14719.
+
+    *Yves Senn*
+
+*   Keep PostgreSQL `hstore` and `json` attributes as `Hash` in `@attributes`.
+    Fixes duplication in combination with `store_accessor`.
+
+    Fixes #15369.
+
+    *Yves Senn*
+
+*   `rake railties:install:migrations` respects the order of railties.
+
+    *Arun Agrawal*
+
+*   Fix redefine a has_and_belongs_to_many inside inherited class
+    Fixing regression case, where redefining the same has_an_belongs_to_many
+    definition into a subclass would raise.
+
+    Fixes #14983.
+
+    *arthurnn*
+
+*   Fix has_and_belongs_to_many public reflection.
+    When defining a has_and_belongs_to_many, internally we convert that to two has_many.
+    But as `reflections` is a public API, people expect to see the right macro.
+
+    Fixes #14682.
+
+    *arthurnn*
+
+*   Fixed serialization for records with an attribute named `format`.
+
+    Fixes #15188.
+
+    *Godfrey Chan*
+
+*   When a `group` is set, `sum`, `size`, `average`, `minimum` and `maximum`
+    on a NullRelation should return a Hash.
+
+    *Kuldeep Aggarwal*
+
+*   Fixed serialized fields returning serialized data after being updated with
+    `update_column`.
+
+    *Simon Hørup Eskildsen*
+
+*   Fixed polymorphic eager loading when using a String as foreign key.
+
+    Fixes #14734.
+
+    *Lauro Caetano*
+
+*   Change belongs_to touch to be consistent with timestamp updates
+
+    If a model is set up with a belongs_to: touch relationship the parent
+    record will only be touched if the record was modified. This makes it
+    consistent with timestamp updating on the record itself.
+
+    *Brock Trappitt*
+
+*   Fixed the inferred table name of a has_and_belongs_to_many auxiliar
+    table inside a schema.
+
+    Fixes #14824
+
+    *Eric Chahin*
+
+*   Remove unused `:timestamp` type. Transparently alias it to `:datetime`
+    in all cases. Fixes inconsistencies when column types are sent outside of
+    `ActiveRecord`, such as for XML Serialization.
+
+    *Sean Griffin*
+
+*   Fix bug that added `table_name_prefix` and `table_name_suffix` to
+    extension names in PostgreSQL when migrating.
+
+    *Joao Carlos*
+
+*   The `:index` option in migrations, which previously was only available for
+    `references`, now works with any column types.
+
+    *Marc Schütz*
+
+*   Add support for counter name to be passed as parameter on `CounterCache::ClassMethods#reset_counters`.
+
+    *jnormore*
+
+*   Restrict deletion of record when using `delete_all` with `uniq`, `group`, `having`
+    or `offset`.
+
+    In these cases the generated query ignored them and that caused unintended
+    records to be deleted.
+
+    Fixes #11985.
+
+    *Leandro Facchinetti*
+
+*   Floats with limit >= 25 that get turned into doubles in MySQL no longer have
+    their limit dropped from the schema.
+
+    Fixes #14135.
+
+    *Aaron Nelson*
+
+*   Fix how to calculate associated class name when using namespaced has_and_belongs_to_many
+    association.
+
+    Fixes #14709.
+
+    *Kassio Borges*
+
+*   `ActiveRecord::Relation::Merger#filter_binds` now compares equivalent symbols and
+    strings in column names as equal.
+
+    This fixes a rare case in which more bind values are passed than there are
+    placeholders for them in the generated SQL statement, which can make PostgreSQL
+    throw a `StatementInvalid` exception.
+
+    *Nat Budin*
+
+*   Fix `stored_attributes` to correctly merge the details of stored
+    attributes defined in parent classes.
+
+    Fixes #14672.
+
+    *Brad Bennett*, *Jessica Yao*, *Lakshmi Parthasarathy*
+
+*   `change_column_default` allows `[]` as argument to `change_column_default`.
+
+    Fixes #11586.
+
+    *Yves Senn*
+
+*   Handle `name` and `"char"` column types in the PostgreSQL adapter.
+
+    `name` and `"char"` are special character types used internally by
+    PostgreSQL and are used by internal system catalogs. These field types
+    can sometimes show up in structure-sniffing queries that feature internal system
+    structures or with certain PostgreSQL extensions.
+
+    *J Smith*, *Yves Senn*
+
+*   Fix `PostgreSQLAdapter::OID::Float#type_cast` to convert Infinity and
+    NaN PostgreSQL values into a native Ruby `Float::INFINITY` and `Float::NAN`
+
+    Before:
+
+        Point.create(value: 1.0/0)
+        Point.last.value # => 0.0
+
+    After:
+
+        Point.create(value: 1.0/0)
+        Point.last.value # => Infinity
+
+    *Innokenty Mikhailov*
+
+*   Allow the PostgreSQL adapter to handle bigserial primary key types again.
+
+    Fixes #10410.
+
+    *Patrick Robertson*
+
+*   Deprecate joining, eager loading and preloading of instance dependent
+    associations without replacement. These operations happen before instances
+    are created. The current behavior is unexpected and can result in broken
+    behavior.
+
+    Fixes #15024.
+
+    *Yves Senn*
+
+*   Fixed has_and_belongs_to_many's CollectionAssociation size calculation.
+
+    has_and_belongs_to_many should fall back to using the normal CollectionAssociation's
+    size calculation if the collection is not cached or loaded.
+
+    Fixes #14913, #14914.
+
+    *Fred Wu*
+
+*   Return a non zero status when running `rake db:migrate:status` and migration table does
+    not exist.
+
+    *Paul B.*
+
+*   Add support for module-level `table_name_suffix` in models.
+
+    This makes `table_name_suffix` work the same way as `table_name_prefix` when
+    using namespaced models.
+
+    *Jenner LaFave*
+
+*   Revert the behaviour of `ActiveRecord::Relation#join` changed through 4.0 => 4.1 to 4.0.
+
+    In 4.1.0 `Relation#join` is delegated to `Arel#SelectManager`.
+    In 4.0 series it is delegated to `Array#join`.
+
+    *Bogdan Gusiev*
+
+*   Log nil binary column values correctly.
+
+    When an object with a binary column is updated with a nil value
+    in that column, the SQL logger would throw an exception when trying
+    to log that nil value. This only occurs when updating a record
+    that already has a non-nil value in that column since an initial nil
+    value isn't included in the SQL anyway (at least, when dirty checking
+    is enabled.) The column's new value will now be logged as `<NULL binary data>`
+    to parallel the existing `<N bytes of binary data>` for non-nil values.
+
+    *James Coleman*
+
+*   Rails will now pass a custom validation context through to autosave associations
+    in order to validate child associations with the same context.
+
+    Fixes #13854.
+
+    *Eric Chahin*, *Aaron Nelson*, *Kevin Casey*
+
+*   Stringify all variables keys of MySQL connection configuration.
+
+    When `sql_mode` variable for MySQL adapters set in configuration as `String`
+    was ignored and overwritten by strict mode option.
+
+    Fixes #14895.
+
+    *Paul Nikitochkin*
+
+*   Ensure SQLite3 statements are closed on errors.
+
+    Fixes #13631.
+
+    *Timur Alperovich*
+
+*   Give ActiveRecord::PredicateBuilder private methods the privacy they deserve.
+
+    *Hector Satre*
+
 *   When using a custom `join_table` name on a `habtm`, rails was not saving it
     on Reflections. This causes a problem when rails loads fixtures, because it
     uses the reflections to set database with fixtures.
@@ -139,7 +391,7 @@
 
 *   Auto-generate stable fixture UUIDs on PostgreSQL.
 
-    Fixes: #11524
+    Fixes #11524.
 
     *Roderick van Domburg*
 
@@ -257,12 +509,6 @@
 
     *Cody Cutrer*, *Steve Rice*, *Rafael Mendonça Franca*
 
-*   Save `has_one` association even if the record doesn't changed.
-
-    Fixes #14407.
-
-    *Rafael Mendonça França*
-
 *   Use singular table name in generated migrations when
     `ActiveRecord::Base.pluralize_table_names` is `false`.
 
@@ -341,6 +587,12 @@
 
     *Troy Kruthoff*, *Lachlan Sylvester*
 
+*   Only save has_one associations if record has changes.
+    Previously after save related callbacks, such as `#after_commit`, were triggered when the has_one
+    object did not get saved to the db.
+
+    *Alan Kennedy*
+
 *   Allow strings to specify the `#order` value.
 
     Example: