In rails 4 what is the correct way of using .where with associations?

In rails 4 what is the correct way of using .where with associations?



1.Ruby on Rails - Wikipedia, the free encyclopedia

Description:Ruby on Rails, often simply Rails, is an open source web
application framework which runs via the Ruby programming language. It is
a full-stack framework: it allows ...



2.Learn Web Development with the Ruby on Rails Tutorial

Description:Ruby on Rails Tutorial: Learn Rails by Example by Michael Hartl



3.Active Record Migrations — Ruby on Rails Guides

Description:1 Migration Overview. Migrations are a convenient way to alter
your database schema over time in a consistent and easy way. They use a
Ruby DSL so that you don't have ...



4.WMATA - Metro - Home page

Description:Metrorail and Metrobus transit services in Washington, DC,
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5.Track (rail transport) - Wikipedia, the free encyclopedia

Description:The track on a railway or railroad, also known as the
permanent way, is the structure consisting of the rails, fasteners,
railroad ties (sleepers, British English ...



6.The Asset Pipeline — Ruby on Rails Guides

Description:When using asset precompilation (the production default), you
will need to ensure that your controller assets will be precompiled when
loading them on a per page basis.



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10.Frequently Asked Questions about the Transcontinental Railroad

Description:Frequently asked questions about the transcontinental
railroad. Central Pacific Railroad Photographic History Museum.