Test for many to many join issue

Author: radovanradic

data-tck/src/main/groovy/io/micronaut/data/tck/tests/AbstractRepositorySpec.groovy

@@ -2539,6 +2539,12 @@ abstract class AbstractRepositorySpec extends Specification {
         book2.getStudents().add(student)
         bookRepository.save(book1)
         bookRepository.save(book2)
+        def otherStudent = new Student("Ioana")
+        studentRepository.save(otherStudent)
+        when:
+        def students = studentRepository.queryByName(otherStudent.name, Pageable.from(0, 2))
+        then:
+        students.size() == 1
         when:
         def loadedStudent = studentRepository.findByName(student.name).get()
         def loadedBook1 = bookRepository.findById(book1.id).get()
@@ -2554,6 +2560,10 @@ abstract class AbstractRepositorySpec extends Specification {
         loadedBook2
         loadedBook2.title == book2.title
         loadedBook2.id == book2.id
+        when:
+        students = studentRepository.queryByName(student.name, Pageable.from(0, 2))
+        then:
+        students.size() == 1
         cleanup:
         studentRepository.delete(student)
         bookRepository.delete(book1)

data-tck/src/main/java/io/micronaut/data/tck/repositories/StudentRepository.java

@@ -19,6 +19,7 @@
 import io.micronaut.data.annotation.Id;
 import io.micronaut.data.annotation.Join;
 import io.micronaut.data.annotation.Version;
+import io.micronaut.data.model.Pageable;
 import io.micronaut.data.repository.CrudRepository;
 import io.micronaut.data.repository.jpa.JpaSpecificationExecutor;
 import io.micronaut.data.repository.jpa.criteria.QuerySpecification;
@@ -43,6 +44,9 @@ public interface StudentRepository extends CrudRepository<Student, Long>, JpaSpe
     @Join(value = "books", type = Join.Type.FETCH)
     Optional<Student> findByName(String name);
 
+    @Join(value = "books", type = Join.Type.LEFT)
+    List<Student> queryByName(String name, Pageable pageable);
+
     static QuerySpecification<Student> byBookTitles(List<String> bookTitles) {
         return (root, query, criteriaBuilder) -> {
             boolean isCountQuery = query.getResultType().equals(Long.class);