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* 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*
* Virtual attributes will no longer raise when read on models loaded from the
database
*Sean Griffin*
* Support calling the method `merge` in `scope`'s lambda.
*Yasuhiro Sugino*
* Fixes multi-parameter attributes conversion with invalid params.
*Hiroyuki Ishii*
* Add newline between each migration in `structure.sql`.
Keeps schema migration inserts as a single commit, but allows for easier
git diffing.
Fixes #25504.
*Grey Baker*, *Norberto Lopes*
* The flag `error_on_ignored_order_or_limit` has been deprecated in favor of
the current `error_on_ignored_order`.
*Xavier Noria*
* Batch processing methods support `limit`:
Post.limit(10_000).find_each do |post|
# ...
end
It also works in `find_in_batches` and `in_batches`.
*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.
*Sean Griffin*
* Fix the generated `#to_param` method to use `omission: ''` so that
the resulting output is actually up to 20 characters, not
effectively 17 to leave room for the default "...".
Also call `#parameterize` before `#truncate` and make the
`separator: /-/` to maximize the information included in the
output.
Fixes #23635.
*Rob Biedenharn*
* Ensure concurrent invocations of the connection reaper cannot allocate the
same connection to two threads.
Fixes #25585.
*Matthew Draper*
* Inspecting an object with an associated array of over 10 elements no longer
truncates the array, preventing `inspect` from looping infinitely in some
cases.
*Kevin McPhillips*
* Removed the unused methods `ActiveRecord::Base.connection_id` and
`ActiveRecord::Base.connection_id=`.
*Sean Griffin*
* Ensure hashes can be assigned to attributes created using `composed_of`.
Fixes #25210.
*Sean Griffin*
* Fix logging edge case where if an attribute was of the binary type and
was provided as a Hash.
*Jon Moss*
* Handle JSON deserialization correctly if the column default from database
adapter returns `''` instead of `nil`.
*Johannes Opper*
* Introduce `ActiveRecord::TransactionSerializationError` for catching
transaction serialization failures or deadlocks.
*Erol Fornoles*
* 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.
Example:
psql -v ON_ERROR_STOP=1 -q -f awesome-file.sql my-app-db
Fixes #23818.
*Ralin Chimev*
Please check [5-0-stable](https://github.com/rails/rails/blob/5-0-stable/activerecord/CHANGELOG.md) for previous changes.
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