ebean/src/test/java/io/ebeaninternal/server/expression/IsEmptyExpressionQueryTest.java

package io.ebeaninternal.server.expression;

import io.ebean.BaseTestCase;
import io.ebean.Ebean;
import io.ebean.Query;
import org.ebeantest.LoggedSqlCollector;
import org.junit.Test;
import org.tests.model.basic.Contact;
import org.tests.model.basic.Customer;
import org.tests.model.basic.ResetBasicData;
import org.tests.model.nofk.EUserNoFk;

import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;

public class IsEmptyExpressionQueryTest extends BaseTestCase {

  @Test
  public void isEmpty() {

    ResetBasicData.reset();

    Query<Customer> query = Ebean.find(Customer.class)
      .select("id")
      .where().isEmpty("contacts")
      .query();

    query.findList();
    assertThat(sqlOf(query)).contains("select t0.id from o_customer t0 where not exists (select 1 from contact x where x.customer_id = t0.id");
  }

  @Test
  public void deleteQuery_isEmpty() {

    ResetBasicData.reset();

    LoggedSqlCollector.start();

    Ebean.find(EUserNoFk.class)
      .where().isEmpty("files")
      .delete();

    List<String> sql = LoggedSqlCollector.stop();
    assertThat(sql).hasSize(1);

    if (isPlatformSupportsDeleteTableAlias()) {
      assertSql(sql.get(0)).contains("delete from euser_no_fk t0 where not exists (select 1 from efile_no_fk x where x.owner_user_id = t0.user_id)");
    } else if (isMySql()) {
      assertSql(sql.get(0)).contains("delete t0 from euser_no_fk t0 where not exists (select 1 from efile_no_fk x where x.owner_user_id = t0.user_id)");
    } else {
      assertSql(sql.get(0)).contains("delete from euser_no_fk where not exists (select 1 from efile_no_fk x where x.owner_user_id = user_id)");
    }
  }

  @Test
  public void isNotEmpty() {

    ResetBasicData.reset();

    Query<Customer> query = Ebean.find(Customer.class)
      .select("id")
      .where().isNotEmpty("contacts")
      .query();

    query.findList();
    assertThat(sqlOf(query)).contains("select t0.id from o_customer t0 where exists (select 1 from contact x where x.customer_id = t0.id");
  }

  @Test
  public void isEmpty_contacts() {

    ResetBasicData.reset();

    Query<Contact> query = Ebean.find(Contact.class)
      .select("id")
      .where().isEmpty("notes")
      .query();

    query.findList();
    assertThat(sqlOf(query)).contains("select t0.id from contact t0 where not exists (select 1 from contact_note x where x.contact_id = t0.id");
  }

  @Test
  public void isNotEmpty_contacts() {

    ResetBasicData.reset();

    Query<Contact> query = Ebean.find(Contact.class)
      .select("id")
      .where().isNotEmpty("notes")
      .query();

    query.findList();
    assertThat(sqlOf(query)).contains("select t0.id from contact t0 where exists (select 1 from contact_note x where x.contact_id = t0.id");
  }


  @Test
  public void isEmpty_manyToMany() {

    ResetBasicData.reset();

    Query<Contact> query = Ebean.find(Contact.class)
      .select("id")
      .where().isEmpty("notes")
      .query();

    query.findList();
  }


  @Test
  public void isEmpty_nested() {

    ResetBasicData.reset();

    Query<Customer> query = Ebean.find(Customer.class)
      .select("id")
      .where().isEmpty("contacts.notes")
      .query();

    query.findList();
    if (isPostgres()) {
      assertThat(sqlOf(query)).contains("select distinct on (t0.id) t0.id from o_customer t0 join contact u1 on u1.customer_id = t0.id  where not exists (select 1 from contact_note x where x.contact_id = u1.id)");

    } else {
      assertThat(sqlOf(query)).contains("select distinct t0.id from o_customer t0 join contact u1 on u1.customer_id = t0.id where not exists (select 1 from contact_note x where x.contact_id = u1.id)");
    }
  }

  @Test
  public void isNotEmpty_nested() {

    ResetBasicData.reset();

    Query<Customer> query = Ebean.find(Customer.class)
      .select("id")
      .where().isNotEmpty("contacts.notes")
      .query();

    query.findList();
    if (isPostgres()) {
      assertThat(sqlOf(query)).contains("select distinct on (t0.id) t0.id from o_customer t0 join contact u1 on u1.customer_id = t0.id  where exists (select 1 from contact_note x where x.contact_id = u1.id)");

    } else {
      assertThat(sqlOf(query)).contains("select distinct t0.id from o_customer t0 join contact u1 on u1.customer_id = t0.id where exists (select 1 from contact_note x where x.contact_id = u1.id)");
    }
  }

}