I'm a little new to Spring Data and I'm having trouble finding anything about this in the docs. All I need to do is put a filter on a collection of child elements.
I have two tables - courses and exercises - with a one-to-many relationship between courses and exercises. The exercise table has an "active" filed and I want to filter the list of exercises I get back so that I only see "active" exercises. The SQL would look like this:
Here is the relevant portion of my Course class
I'm generally searching for courses by ID, so I set up the following method in my Course repository
This runs with no errors, but the list of attached Exercises contains entries where active = false. QueryDSL seems like it could provide the answer, but I've looked into the docs and I don't see a clear way to manipulate collections of child elements. Any advice would be appreciated.
Thanks,
Alex
I have two tables - courses and exercises - with a one-to-many relationship between courses and exercises. The exercise table has an "active" filed and I want to filter the list of exercises I get back so that I only see "active" exercises. The SQL would look like this:
Code:
select c.*, e.*
from courses c, exercises e
where e.course_id = c.course_id
and e.active = trueCode:
@OneToMany(fetch = FetchType.LAZY)
@JoinColumn(name = "course_id")
private List<Exercise> exercises;Code:
@Query("select c from Course c join c.exercises e where c.id = :courseID and e.active = true")
public Course findOneWithActiveExercises(@Param("courseID") Long courseID);Thanks,
Alex