Posted over 10 years ago. Visible to the public. Repeats.

How to define constants with traits

This is pretty much like defining subclasses through traits with the Modularity gem.

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module MyConstantTrait as_trait do self::MY_CONSTANT = 'hello universe' end end

This would set MY_CONSTANT for any class using the trait.

Of course you can also use parameters (for logic or for setting values, like here):

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module DoesValues as_trait do |*args| self::VALUES = args end end class Foo include DoesValues[:foo, :bar, :baz] end Foo::VALUES => [ :foo, :bar, :baz ]

By refactoring problematic code and creating automated tests, makandra can vastly improve the maintainability of your Rails application.

Owner of this card:

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Arne Hartherz
Last edit:
14 days ago
by Henning Koch
About this deck:
We are makandra and do test-driven, agile Ruby on Rails software development.
License for source code
Posted by Arne Hartherz to makandra dev
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