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Finding a method name on a Ruby object

Wondering how a specific method on an object is exactly named? You can use Enumerable#grep to detect it in the array of methods.

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@user.methods.grep /name/ # => [:name, :first_name, :last_name]

You can also call #private_methods or #public_methods. To find only relevant methods, it is suggested to subtract generic methods like this:

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User.methods - Object.methods User.methods - ActiveRecord::Base.methods
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@user.methods - Object.instance_methods @user.methods - ActiveRecord::Base.instance_methods
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Thomas Klemm
Last edit:
over 2 years ago
by Arne Hartherz
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