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rails--rails/activerecord/CHANGELOG.md
glaszig 5b2332ac71 allow passing false to :polymorphic option of belongs_to 
before this, passing false would raise the following error
because a condition in AR would disregard the option entirely
if false was passed.

ArgumentError: Unknown key: :polymorphic. Valid keys are:
:class_name, :anonymous_class, :primary_key, :foreign_key,
:dependent, :validate, :inverse_of, :strict_loading, :autosave,
:required, :touch, :counter_cache, :optional, :default
2020-12-18 06:32:01 +01:00

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  • Restore possibility of passing false to :polymorphic option of belongs_to.

    Previously, passing false would trigger the option validation logic to throw an error saying :polymorphic would not be a valid option.

    glaszig

  • Remove deprecated database kwarg from connected_to.

    Eileen M. Uchitelle, John Crepezzi

  • Allow adding nonnamed expression indexes to be revertible.

    Fixes #40732.

    Previously, the following code would raise an error, when executed while rolling back, and the index name should be specified explicitly. Now, the index name is inferred automatically.

    add_index(:items, "to_tsvector('english', description)")

    fatkodima

  • Only warn about negative enums if a positive form that would cause conflicts exists.

    Fixes #39065.

    Alex Ghiculescu

  • Add option to run default_scope on all queries.

    Previously, a default_scope would only run on select or insert queries. In some cases, like non-Rails tenant sharding solutions, it may be desirable to run default_scope on all queries in order to ensure queries are including a foreign key for the shard (ie blog_id).

    Now applications can add an option to run on all queries including select, insert, delete, and update by adding an all_queries option to the default scope definition.

    class Article < ApplicationRecord
  default_scope -> { where(blog_id: Current.blog.id) }, all_queries: true
end

    Eileen M. Uchitelle

  • Add where.associated to check for the presence of an association.

    # Before:
account.users.joins(:contact).where.not(contact_id: nil)

# After:
account.users.where.associated(:contact)

    Also mirrors where.missing.

    Kasper Timm Hansen

  • Allow constructors (build_association and create_association) on has_one :through associations.

    Santiago Perez Perret

Please check 6-1-stable for previous changes.