I am currently working through the Well Grounded Rubyist. Great book so far. I am stuck on something I don't quite get with ruby. I have two files
In ModuleTester.rb
class ModuleTester
include MyFirstModule
end
mt = ModuleTester.new
mt.say_hello
In MyFirstModule.rb
module MyFirstModule
def say_hello
puts "hello"
end
end
When I run 'ruby ModuleTester.rb', I get the following message:
ModuleTester.rb:2:in <class:ModuleTester>': uninitialized constant ModuleTester::MyFirstModule (NameError)
from ModuleTester.rb:1:in
'
From what I have found online, the current directory isn't in the the namespace, so it can't see the file. But, the include statement doesn't take a string to let me give the path. Since the include statement and require statements do different things, I am absolutely lost as to how to get the include statement to recognize the module. I looked through other questions, but they all seem to be using the require statement. Any hints are greatly appreciated.
You use require
to load a file, not include
. :-)
First, you have to require
the file containing the module you want to include
. Then you can include
the module.
If you're using Rails, it has some magic to automagically require
the right file first. But otherwise, you have to do it yourself.
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