rails/activerecord/CHANGELOG.md

• Fix an issue where the IDs reader method did not return expected results for preloaded associations in models using composite primary keys.

  Jay Ang

• Allow to configure strict_loading_mode globally or within a model.

  Defaults to :all, can be changed to :n_plus_one_only.

  Garen Torikian

• Add ActiveRecord::Relation#readonly?.

  Reflects if the relation has been marked as readonly.

  Theodor Tonum

• Improve ActiveRecord::Store to raise a descriptive exception if the column is not either structured (e.g., PostgreSQL +hstore+/+json+, or MySQL +json+) or declared serializable via ActiveRecord.store.

  Previously, a NoMethodError would be raised when the accessor was read or written:

  NoMethodError: undefined method `accessor' for an instance of ActiveRecord::Type::Text
  

  Now, a descriptive ConfigurationError is raised:

  ActiveRecord::ConfigurationError: the column 'metadata' has not been configured as a store.
    Please make sure the column is declared serializable via 'ActiveRecord.store' or, if your
    database supports it, use a structured column type like hstore or json.
  

  Mike Dalessio

• Fix inference of association model on nested models with the same demodularized name.

  E.g. with the following setup:

  class Nested::Post < ApplicationRecord
    has_one :post, through: :other
  end
  

  Before, #post would infer the model as Nested::Post, but now it correctly infers Post.

  Joshua Young

• Add public method for checking if a table is ignored by the schema cache.

  Previously, an application would need to reimplement ignored_table? from the schema cache class to check if a table was set to be ignored. This adds a public method to support this and updates the schema cache to use that directly.

  ActiveRecord.schema_cache_ignored_tables = ["developers"]
  ActiveRecord.schema_cache_ignored_table?("developers")
  => true
  

  Eileen M. Uchitelle

Please check 7-2-stable for previous changes.