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= New Features
* A concurrent_eager_loading plugin has been added. This plugin
builds on top of the async_thread_pool Database extension and
allows eager loading multiple associations concurrently in
separate threads. With this plugin, you can mark datasets for
concurrent eager loading using eager_load_concurrently:
Album.eager_load_concurrently.eager(:artist, :genre, :tracks).all
Datasets that are marked for concurrent eager loading will use
concurrent eager loading if they are eager loading more than one
association. If you would like to make concurrent eager loading
the default, you can load the plugin with the :always option.
All of the association types that ship with Sequel now support
concurrent eager loading when using this plugin. For custom eager
loaders using the :eager_loader association option, please see the
documentation for the plugin for how to enable custom eager loading
for them.
= Other Improvements
* The date_arithmetic extension now handles ActiveSupport::Duration
values with weeks, as well as :weeks as a key in a hash value. Weeks
are converted into 7 days internally.
* The shared SQLite adapter now emulates the dropping of non-composite
unique constraints. Non-composite unique constraints are now
treated similarly to composite unique constraints, in that dropping
any unique constraints on a table will drop all unique constraints
on that table.
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