Error read relationship hasOne an belong

#10648
Task List

create a database with name "unabaseTest"

Steps to Reproduce

execute ./gradlew build for testing application

Expected Behaviour

The call of integration test to executing checkFather method of Pruebaservice and result expect shoul be a list with [1, 2] value, because the foreing key of class child are hija = 1 and hijaPol = 2

Actual Behaviour

but the list that return the service is [1,1] because is matching with ID of classes of child and no with foreing key

Environment Information

Operating System: ubuntu 16.04 LTS
Grails Version: 3.1.8.
JDK Version: jdk1.8.0_121
Container Version (If Applicable): Tomcat8
db mysql 5.7.8

Example Application
I will attachment a zip file with application for testing

Additional notes

When execute build the integration test run and you can see in reports th output.

BD
I will attachement image of db tables

Start by reviewing issue #10648, the Pruebaservice checkFather method, and the integration test run by ./gradlew build. Reproduce the result with the attached application and MySQL schema; done means the relationship returns [1, 2] from the foreign-key values instead of [1, 1] from child IDs.

Written by the indexing model from the issue text.