Introduction
IntelliJ IDEA allows you to generate Ruby classes. So doing, it's possible to create classes nested in the right modules, and select between a class or a module.
Generating a Ruby class
This how it's done.
- In the Project tool window, select the directory where you want a class to be created, and press Alt+Insert.
- From the pop-up menu, choose Ruby Class.
- In the New Ruby Class dialog box, enter the Ruby class name:

Note that IntelliJ IDEA allows you to create classes prepended by modules. If required, prepend the class name with module name:

IntelliJ IDEA creates a new Ruby class and opens it for editing. If a module name has been specified, it is displayed in the editor:

Changing type of the created object
To change the kind of an object being created, do the following:
- Create a Java class, as described above.
- With the New Ruby Class dialog box opened, press up/down arrow keys to
change the type of the created object.
Alternatively, click the Kind drop-down list and choose between class and module.