Question

Query : I like to know how one can get latest entry of a domain entity in Grails.

Problem domain:

 class Parent {

    String name
    static hasMany = [children:Child]
}


class Child {

        String name
        Parent parent
        static belongsTo = [parent:Parent]

    }

Data model

Results

i like to pull record with id 4 and 7

where critria should be “get me last record of each parent where child’sname like ‘Rox%’

so far i have tried

SELECT
MAX(id)
FROM child
WHERE parent_id IN(SELECT
                     p.id
                   FROM parent AS p
                     JOIN child AS c
                       ON (c.parent_id = p.id
                           AND c.name LIKE 'Rox%'))
 GROUP BY parent_id 

thanks in advance.

Answer 1

Your description is a tad shady, but I think this is what you want:

def idList = [1,4]
def c = Parent.createCriteria()
def result = c.list {
  'in'("id", idList)
  children {
    like("name","Rox%")
  }
  groupProperty("id")
}

Edit:

You changed your whole question around while I typed my answer out, changed it around to match.

Final edit:
Add sorting to children {} in the edited code to get the sorting you want.