If I have @commentable, which could either be a Post or Article, can I extract the model name from the instance variable?
- You may always use is_a? to test for a certain type.Edvaldo Silva de Almeida Jr– Edvaldo Silva de Almeida Jr2016-03-09 09:52:58 +00:00Commented Mar 9, 2016 at 9:52
- The question always is: why do you need it? If you are planning to use it for forking your flow it will be a serious architectural error (breaking Demeter law) which you will need to pay for later.BroiSatse– BroiSatse2016-03-09 09:58:13 +00:00Commented Mar 9, 2016 at 9:58
- 1Possible duplicate of How do I get the name of a Ruby class?Brad Werth– Brad Werth2016-03-09 10:22:44 +00:00Commented Mar 9, 2016 at 10:22
Add a comment |
2 Answers
Use @commentable.class.name to find out the variable's class name.
2 Comments
max pleaner
another way to do it is
@commentable.class.to_s.underscore
BroiSatse
@commentable.class.model_name.singular is a rails way of doing it.You can use:
@commentable.class.name But here is a gotcha. If the name of a class is like this ActiveRecord::Base i.e. it contains a module as well, you can call demodulize to get only the class name.
@instance_variable.class.name.demodulize # when the class name contains any module. 