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#642 - ENH: Add support for OneToMany expression isEmpty() / isNotEmpty() ... which is effectively an EXISTS and NOT EXISTS subquery

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This commit is contained in:
Robin Bygrave
2016-04-08 13:41:43 +12:00
parent c58db0033d
commit 4059034891
20 changed files with 675 additions and 294 deletions
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src/test/java/com/avaje/tests/query/TestManyWhereJoinM2M.java
+33
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@@ -11,6 +11,8 @@ import com.avaje.ebean.Query;
import com.avaje.tests.model.basic.MRole;
import com.avaje.tests.model.basic.MUser;
import static org.assertj.core.api.Assertions.assertThat;
public class TestManyWhereJoinM2M extends BaseTestCase {
@Test
@@ -43,6 +45,10 @@ public class TestManyWhereJoinM2M extends BaseTestCase {
Ebean.save(u1);
MUser u2 = new MUser();
u2.setUserName("user2");
Ebean.save(u2);
Ebean.commitTransaction();
Query<MUser> query = Ebean.find(MUser.class).fetch("roles")
@@ -59,5 +65,32 @@ public class TestManyWhereJoinM2M extends BaseTestCase {
Assert.assertTrue(sql.contains("join mrole "));
Assert.assertTrue(sql.contains(".role_name = ?"));
isEmpty();
isNotEmpty();
}
private void isEmpty() {
Query<MUser> query = Ebean.find(MUser.class)
.where().isEmpty("roles")
.query();
List<MUser> usersWithNoRoles = query.findList();
assertThat(query.getGeneratedSql()).contains("select t0.userid c0, t0.user_name c1, t0.user_type_id c2 from muser t0 where not exists (select 1 from mrole_muser where muser_userid = t0.userid)");
assertThat(usersWithNoRoles).isNotEmpty();
}
private void isNotEmpty() {
Query<MUser> query = Ebean.find(MUser.class)
.select("userName")
.where().isNotEmpty("roles")
.query();
List<MUser> usersWithRoles = query.findList();
assertThat(query.getGeneratedSql()).contains("select t0.userid c0, t0.user_name c1 from muser t0 where exists (select 1 from mrole_muser where muser_userid = t0.userid)");
assertThat(usersWithRoles).isNotEmpty();
}
}