#1806 - SQLException:Data conversion error converting "c5866ffb-2e1c-457e-bdad-61ba4466f86e" [22018-197] Bind values:[1, ] Query was:

src/test/java/org/tests/model/carwheeltruck/TTruckHolder.java

@@ -0,0 +1,85 @@
+package org.tests.model.carwheeltruck;
+
+import org.tests.model.basic.EBasic;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToMany;
+import javax.persistence.Version;
+import java.util.List;
+
+import static javax.persistence.CascadeType.ALL;
+
+@Entity
+public class TTruckHolder {
+
+  @Id
+  private long id;
+
+  @Version
+  private long version;
+
+  private final String name;
+
+  /**
+   * Inheritance but at BOTTOM layer (so no discriminator needed).
+   */
+  @ManyToOne(optional = false)
+  private TTruck truck;
+
+  @ManyToOne
+  private EBasic basic;
+
+  @OneToMany(cascade = ALL, mappedBy = "owner")
+  private List<TTruckHolderItem> items;
+
+  public TTruckHolder(String name, TTruck truck) {
+    this.name = name;
+    this.truck = truck;
+  }
+
+  public long getId() {
+    return id;
+  }
+
+  public void setId(long id) {
+    this.id = id;
+  }
+
+  public long getVersion() {
+    return version;
+  }
+
+  public void setVersion(long version) {
+    this.version = version;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public TTruck getTruck() {
+    return truck;
+  }
+
+  public void setTruck(TTruck truck) {
+    this.truck = truck;
+  }
+
+  public EBasic getBasic() {
+    return basic;
+  }
+
+  public void setBasic(EBasic basic) {
+    this.basic = basic;
+  }
+
+  public List<TTruckHolderItem> getItems() {
+    return items;
+  }
+
+  public void setItems(List<TTruckHolderItem> items) {
+    this.items = items;
+  }
+}

src/test/java/org/tests/model/carwheeltruck/TTruckHolderItem.java

@@ -0,0 +1,49 @@
+package org.tests.model.carwheeltruck;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+import java.util.UUID;
+
+@Entity
+public class TTruckHolderItem {
+
+  @Id
+  private Long id;
+
+  private final UUID someUid;
+
+  private final String foo;
+
+  @ManyToOne(optional = false)
+  private TTruckHolder owner;
+
+  public TTruckHolderItem(String foo) {
+    this.someUid = UUID.randomUUID();
+    this.foo = foo;
+  }
+
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public UUID getSomeUid() {
+    return someUid;
+  }
+
+  public String getFoo() {
+    return foo;
+  }
+
+  public TTruckHolder getOwner() {
+    return owner;
+  }
+
+  public void setOwner(TTruckHolder owner) {
+    this.owner = owner;
+  }
+}

src/test/java/org/tests/model/carwheeltruck/TestMTOInheritNoDiscriminator.java

@@ -0,0 +1,54 @@
+package org.tests.model.carwheeltruck;
+
+import io.ebean.BaseTestCase;
+import io.ebean.DB;
+import org.ebeantest.LoggedSqlCollector;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TestMTOInheritNoDiscriminator extends BaseTestCase {
+
+  @Test
+  public void test() {
+
+    final TTruckHolder holder = setup();
+
+    LoggedSqlCollector.start();
+
+    final TTruckHolder found = DB.find(TTruckHolder.class)
+      .fetch("items")
+      .where().idEq(holder.getId())
+      .findOne();
+
+    assertThat(found).isNotNull();
+    assertThat(found.getItems()).hasSize(2);
+    assertThat(found.getItems()).extracting(TTruckHolderItem::getFoo).contains("a","b");
+
+
+    final List<String> sql = LoggedSqlCollector.stop();
+
+    assertThat(sql).hasSize(1);
+    if (isH2() || isPostgres()) {
+      assertThat(sql.get(0)).contains(" and t2.type = 'truck' ");
+    }
+  }
+
+  private TTruckHolder setup() {
+    TTruck truck = new TTruck();
+    truck.setPlateNo("J78");
+    truck.setLoad(43L);
+
+    DB.save(truck);
+
+    TTruckHolder holder = new TTruckHolder("h1", truck);
+    holder.getItems().add(new TTruckHolderItem("a"));
+    holder.getItems().add(new TTruckHolderItem("b"));
+
+    DB.save(holder);
+
+    return holder;
+  }
+}