CODEWITHSUNDEEP
ruby-on-railsruby
lampShade
lampShade

Reputation: 4391

In Ruby is there a way to tell where a method is defined?

In Ruby is there a way to tell where a method is defined? I'm going through the ruby-guides and there is a line of code that reads Post.all How can I tell where all is defined?

Upvotes: 7

Views: 178

Answers (2)

Reactormonk
Reactormonk

Reputation: 21690

If you want to know the file and line where the method is defined, use

Post.method(:all).source_location

It will give you [file, line] or nil if it's a C method.

Upvotes: 18

Chris Cherry
Chris Cherry

Reputation: 28554

A method can be used via a Method object. Which at that point as an owner attribute. So you can do something like this:

puts Post.method(:all).owner

That will tell you the module/class that defines the method.

Upvotes: 7

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