Find classes available in a Module

Question

I have a module MyModule. I dynamically load classes into it. How can I get a list of the classes defined within its namespace?

Example:

Answer 1

If you're on rails, you need to access the constants first for them to show up, because they're lazyly loaded.

MyModule::NotAClass = "not a class"

MyModule.constants => [:NotAClass]

MyModule::AClass => :AClass # Access class for it to be autoloaded

MyModule.constants => [:AClass, :NotAClass]

# Now, select the constants which are class instances

MyModule.constants
        .map(&MyModule.method(:const_get))
        .select { |constant| constant.is_a? Class} 

 => [MyModule::AClass]**