Check parent term when checking subterm I have a client with a really large taxonomy, which is used for a certain node type. My client wants that the parent term of a chosen subterm, to also be used for a node.

Let's say that this is the taxonomy:


Parent1

Child1
Child2 

Parent2

Child3



If the user checks (they are printed as checkboxes) either child, its parent term will also be used.

Is there already a module for that, or something, or do I have to write my own?

Drupal 7
Taxonomy Term Reference Tree Widget has this option.
install and select it as your taxonomy reference widget and check Select parents automatically in field instance setting form