rails--rails/activerecord/CHANGELOG.md

• 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 for previous changes.