#1833 - When cascade persisting twice to ElementCollection ... we get do extra delete and inserts

src/test/java/org/tests/model/elementcollection/EcTop.java

@@ -0,0 +1,71 @@
+package org.tests.model.elementcollection;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.ManyToMany;
+import javax.persistence.ManyToOne;
+import javax.persistence.Version;
+import java.util.List;
+
+import static javax.persistence.CascadeType.ALL;
+
+@Entity
+public class EcTop {
+
+  @Id
+  private long id;
+
+  @Version
+  private long version;
+
+  private final String name;
+
+  @ManyToOne(cascade = ALL)
+  private EcsPerson person;
+
+  /**
+   * Not normally expect cascade on ManyToMany but here for this test.
+   */
+  @ManyToMany(cascade = ALL)
+  private List<EcsPerson> people;
+
+  public EcTop(String name) {
+    this.name = name;
+  }
+
+  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 EcsPerson getPerson() {
+    return person;
+  }
+
+  public void setPerson(EcsPerson person) {
+    this.person = person;
+  }
+
+  public List<EcsPerson> getPeople() {
+    return people;
+  }
+
+  public void setPeople(List<EcsPerson> people) {
+    this.people = people;
+  }
+}

src/test/java/org/tests/model/elementcollection/TestElementCollectionCascadeMultiple.java

@@ -0,0 +1,51 @@
+package org.tests.model.elementcollection;
+
+import io.ebean.BaseTestCase;
+import io.ebean.DB;
+import io.ebean.annotation.Transactional;
+import org.ebeantest.LoggedSqlCollector;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TestElementCollectionCascadeMultiple extends BaseTestCase {
+
+  @Test
+  public void test() {
+
+    EcTop top = new EcTop("top0");
+
+    EcsPerson person = new EcsPerson("Ethan027");
+    person.getPhoneNumbers().add("027 1234");
+    person.getPhoneNumbers().add("027 4321");
+
+    top.setPerson(person);
+    top.getPeople().add(person);
+
+    LoggedSqlCollector.start();
+
+    save(top);
+
+    final List<String> sql = LoggedSqlCollector.stop();
+
+    assertThat(sql.get(0)).contains("insert into ecs_person");
+    assertThat(sql.get(1)).contains("-- bind");
+    assertThat(sql.get(2)).contains("insert into ecs_person_phone");
+    assertThat(sql.get(3)).contains("-- bind");
+    assertThat(sql.get(4)).contains("-- bind");
+    assertThat(sql.get(5)).contains("insert into ec_top");
+    assertThat(sql.get(6)).contains("-- bind");
+    assertThat(sql.get(7)).contains("insert into ec_top_ecs_person");
+    assertThat(sql.get(8)).contains("-- bind");
+
+    assertThat(sql).hasSize(9);
+  }
+
+  @Transactional(batchSize = 20)
+  public void save(EcTop top) {
+    DB.save(top);
+  }
+
+}