This gem is a dependency of Rails 4.0 to provide deprecated finder functionality.

It will be removed as a dependency in Rails 4.1, but users can manually include it in their Gemfile and it will continue to be maintained until Rails 5.

gem 'activerecord-deprecated_finders', require: 'active_record/deprecated_finders'

This gem is used to extract and deprecate old-style finder option hashes in Active Record:

Post.find(:all, conditions: { published_on: 2.weeks.ago }, limit: 5)

as well as the following dynamic finders:

• find_all_by_...
• find_last_by_...
• scoped_by_...
• find_or_initialize_by_...
• find_or_create_by_...

Note that find(primary_key), find_by..., and find_by...! are not deprecated.

To avoid reliance on this gem, you'll need to migrate your finder usage.

To migrate dynamic finders to Rails 4.1+:

• find_all_by_... should become where(...).
• find_last_by_... should become where(...).last.
• scoped_by_... should become where(...).
• find_or_initialize_by_... should become find_or_initialize_by(...).
• find_or_create_by_... should become find_or_create_by(...).

To migrate old-style finder option hashes and for additional information, please refer to:

• ActiveRecord::FinderMethods, ActiveRecord::Relation, and ActiveRecord::QueryMethods docs.
• Rails Guide: Upgrading Ruby on Rails (stable / edge).