I was surprised that I couldn’t find an example of this in any of the Grails and GORM docs or online examples.
I want to find the names and number of occurrences of the CHILD in a 1 to many association based on an attribute in the parent.
The domain classes are:
class Parent {
static hasMany = [children:Child]
String firstname
}
class Child {
static belongsTo = [parent:Parent]
String name
}
To find all the children and # of occurrences across ANY Parent where firstname is 'John':
def fName = 'John'
def children = Parent.withCriteria {
projections {
groupProperty 'name'
count 'id'
}
parent {
eq 'firstname', fName
}
}
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