1 files changed, 166 insertions, 2 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 14a6c3c9f7..95cdc6bc3f 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,164 @@
+*   Allow `slice` to take an array of methods (without need for splatting).
+
+    *Cohen Carlisle*
+
+*   Improved partial writes with HABTM and has many through associations
+    to fire database query only if relation has been changed.
+
+    Fixes #19663.
+
+    *Mehmet Emin İNAÇ*
+
+*   Deprecate passing arguments and block at the same time to
+    `ActiveRecord::QueryMethods#select`.
+
+    *Prathamesh Sonpatki*
+
+*   Optimistic locking: Added ability update locking_column value.
+    Ignore optimistic locking if update with new locking_column value.
+
+    *bogdanvlviv*
+
+*   Fixed: Optimistic locking does not work well with null in the database.
+
+    Fixes #26024
+
+    *bogdanvlviv*
+
+*   Fixed support for case insensitive comparisons of `text` columns in
+    PostgreSQL.
+
+    *Edho Arief*
+
+*   Serialize JSON attribute value `nil` as SQL `NULL`, not JSON `null`
+
+    *Trung Duc Tran*
+
+*   Return `true` from `update_attribute` when the value of the attribute
+    to be updated is unchanged.
+
+    Fixes #26593.
+
+    *Prathamesh Sonpatki*
+
+*   Always store errors details information with symbols.
+
+    When the association is autosaved we were storing the details with
+    string keys. This was creating inconsistency with other details that are
+    added using the `Errors#add` method. It was also inconsistent with the
+    `Errors#messages` storage.
+
+    To fix this inconsistency we are always storing with symbols. This will
+    cause a small breaking change because in those cases the details could
+    be accessed as strings keys but now it can not.
+
+    Fix #26499.
+
+    *Rafael Mendonça França*, *Marcus Vieira*
+
+*   Calling `touch` on a model using optimistic locking will now leave the model
+    in a non-dirty state with no attribute changes.
+
+    Fixes #26496.
+
+    *Jakob Skjerning*
+
+*   Using a mysql2 connection after it fails to reconnect will now have an error message
+    saying the connection is closed rather than an undefined method error message.
+
+    *Dylan Thacker-Smith*
+
+*   PostgreSQL array columns will now respect the encoding of strings contained
+    in the array.
+
+    Fixes #26326.
+
+    *Sean Griffin*
+
+*   Inverse association instances will now be set before `after_find` or
+    `after_initialize` callbacks are run.
+
+    Fixes #26320.
+
+    *Sean Griffin*
+
+*   Remove unnecessarily association load when a `belongs_to` association has already been
+    loaded then the foreign key is changed directly and the record saved.
+
+    *James Coleman*
+
+*   Remove standardized column types/arguments spaces in schema dump.
+
+    *Tim Petricola*
+
+*   Avoid loading records from database when they are already loaded using
+    the `pluck` method on a collection.
+
+    Fixes #25921.
+
+    *Ryuta Kamizono*
+
+*   Remove text default treated as an empty string in non-strict mode for
+    consistency with other types.
+
+    Strict mode controls how MySQL handles invalid or missing values in
+    data-change statements such as INSERT or UPDATE. If strict mode is not
+    in effect, MySQL inserts adjusted values for invalid or missing values
+    and produces warnings.
+
+        def test_mysql_not_null_defaults_non_strict
+          using_strict(false) do
+            with_mysql_not_null_table do |klass|
+              record = klass.new
+              assert_nil record.non_null_integer
+              assert_nil record.non_null_string
+              assert_nil record.non_null_text
+              assert_nil record.non_null_blob
+
+              record.save!
+              record.reload
+
+              assert_equal 0,  record.non_null_integer
+              assert_equal "", record.non_null_string
+              assert_equal "", record.non_null_text
+              assert_equal "", record.non_null_blob
+            end
+          end
+        end
+
+    https://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sql-mode-strict
+
+    *Ryuta Kamizono*
+
+*   Sqlite3 migrations to add a column to an existing table can now be
+    successfully rolled back when the column was given and invalid column
+    type.
+
+    Fixes #26087
+
+    *Travis O'Neill*
+
+*   Deprecate `sanitize_conditions`. Use `sanitize_sql` instead.
+
+    *Ryuta Kamizono*
+
+*   Doing count on relations that contain LEFT OUTER JOIN Arel node no longer
+    force a DISTINCT. This solves issues when using count after a left_joins.
+
+    *Maxime Handfield Lapointe*
+
+*   RecordNotFound raised by association.find exposes `id`, `primary_key` and
+    `model` methods to be consistent with RecordNotFound raised by Record.find.
+
+    *Michel Pigassou*
+
+*   Hashes can once again be passed to setters of `composed_of`, if all of the
+    mapping methods are methods implemented on `Hash`.
+
+    Fixes #25978.
+
+    *Sean Griffin*
+
 *   Fix the SELECT statement in `#table_comment` for MySQL.
 
     *Takeshi Akima*
@@ -40,7 +201,9 @@
     *Xavier Noria*
 
 *   Using `group` with an attribute that has a custom type will properly cast
-    the hash keys after calling a calculation method like `count`. Fixes #25595.
+    the hash keys after calling a calculation method like `count`.
+
+    Fixes #25595.
 
     *Sean Griffin*
 
@@ -74,6 +237,7 @@
     *Sean Griffin*
 
 *   Ensure hashes can be assigned to attributes created using `composed_of`.
+
     Fixes #25210.
 
     *Sean Griffin*
@@ -93,7 +257,7 @@
 
     *Erol Fornoles*
 
-*   PostgreSQL: Fix db:structure:load silent failure on SQL error.
+*   PostgreSQL: Fix `db:structure:load` silent failure on SQL error.
 
     The command line flag `-v ON_ERROR_STOP=1` should be used
     when invoking `psql` to make sure errors are not suppressed.