Defines a "belongs to" relationship where the class specified by belongsTo assumes ownership of the relationship. This has the effect of controlling how deletes cascade. In other words the owning side will cascade deletes when belongsTo is specified on the inverse side.


class Book {
   String title
   static belongsTo = [author:Author]

In this example the Book class specifies that it belongs to the Author class, hence when an Author instance is deleted so are all the Book instances associated with the Author


Note that belongsTo servers to abstract the nature of the cascading behaviour in Hibernate. However, if you prefer to have full control of cascading deletes you can take advantage of the ORM DSL, which allows fine grained control of cascading deletes.