Suppose I have this
module Command
extend ActiveSupport::Concern
included do
@path ||= File.join("#{file_path}", "some_file")
end
def file_path
File.expand_path("some_other_file")
end
...
When the module is included, I get undefined local variable or method file_path. So is there a way, to make the file_path method be recognized when the module is included ? (of course without putting file_path in the included method)
You are calling the method file_path,in the method included, do..end block. That means with scope is set as Command class. But file_path is the instance_method,so Command.file_path is throwing an legitimate error. You have to call the method file_path,on the instance of the class which is including the Command module. One example to illustrate this -
module A
def self.included(mod)
p foo
end
def foo
2
end
end
class B
include A
end
# `included': undefined local variable or method `foo' for A:Module (NameError)
The error is coming because inside the method included self is A. A has no class method named as foo,so the error comes out. Now to fix it we should call it as below:
module A
def self.included(mod)
p mod.new.foo
end
def foo
2
end
end
class B
include A
end
# >> 2
Command is included inside some class Generator < Initializer, where Initializer has an initialize(param1,param2) method. So following your method I get a legitimate ` wrong number of arguments (0 for 2)`... ?
You can try this :
module Command extend ActiveSupport::Concern
def self.extended(klass)
@path ||= File.join("#{klass.file_path}", "some_file")
end
def file_path
File.expand_path("some_other_file")
end
and then extend your module where you call it !
Module#includeddidn't take block.. Where you found the code ?