Getting all methods in rails
For controllers
PagesController.instance_methods - ActionController::Base.instance_methods - ApplicationController.instance_methods
For models
exclude = Regexp.union ['before_add', 'after_add', 'before_remove', 'after_remove']
(Page.methods(false) - ApplicationRecord.instance_methods - ActiveRecord::Base.methods(true)).reject{|x| x.match? exclude }
Page is the model.
The exclude is needed to remove all the callbacks for related associations.
Note that this also includes the named scopes, and I’ve not found a way to exclude them yet.
Other objects (such as services)
PagesService.methods(false) + PagesService.instance_methods