Shortcut for getting ids for an ActiveRecord scope

You can use .ids on an ActiveRecord scope to pluck all the ids of the relation:

# Modern Rails
User.where("users.name LIKE 'Foo Bar'").ids

# Rails 3.2+ equivalent
User.where("users.name LIKE 'Foo Bar'").pluck(:id)

# Edge rider equivalent for Rails 2+
User.where("users.name LIKE 'Foo Bar'").collect_ids(:id)

github.com

Martin Schaflitzl

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Last edit

2025-05-14

Michael Leimstädtner

License

Source code in this card is licensed under the MIT License.

Posted by Martin Schaflitzl to makandra dev (2019-03-21 10:33)