(Quick Reference)
hasMany
Purpose
Defines a one-to-many association between two classes.
Examples
class Author {
String name
static hasMany = [books:Book]
}In this example we define a one-to-many relationship between the
Author class and the
Book class (one
Author has many books)
Description
By default GORM will create a property of type
java.util.Set using the key inside the definition of the
hasMany map. For example consider this definition:
static hasMany = [books:Book]
Here a property of type
java.util.Set called
books will be created within the defining class. These can then be iterated over and manipulated:
def a = Author.get(1)
a.books.each { println it.title }
