grails criteria query return empty result
Change the 'and' to 'or' after 'childs'. Because, the logical 'or' tries to find the union between the two queries which would always be null.
List<Parent> parents = Parent.createCriteria().listDistinct { and { childs { or { and { eq("gender", 2) ge("height", 150) } and { eq("gender", 1) le("height", 180) } } } } }You can look at a github project I did inorder to illustrate this answer.