unit test for: ensuring many relations won't be deleted on a partial stateless update when using BeanPersistAdapter

src/test/java/com/avaje/tests/model/basic/event/CustomerPersistAdapter.java

@@ -19,5 +19,17 @@ public class CustomerPersistAdapter extends BeanPersistAdapter {
 		
 		return true;
 	}
-	
+
+  @Override
+  public boolean preUpdate(BeanPersistRequest<?> request) {
+
+    Customer customer = (Customer) request.getBean();
+
+    if (customer.getContacts() != null) {
+      String test = "accessed";
+    }
+
+    return true;
+  }
+
 }

src/test/java/com/avaje/tests/update/TestStatelessUpdate.java

@@ -1,5 +1,6 @@
 package com.avaje.tests.update;
 
+import com.avaje.tests.model.basic.Contact;
 import com.avaje.tests.model.basic.Customer;
 import org.junit.Assert;
 import org.junit.Before;
@@ -11,6 +12,8 @@ import com.avaje.ebean.EbeanServer;
 import com.avaje.tests.model.basic.EBasic;
 import com.avaje.tests.model.basic.EBasic.Status;
 
+import java.util.ArrayList;
+
 public class TestStatelessUpdate extends BaseTestCase {
 
   private EbeanServer server;
@@ -100,4 +103,35 @@ public class TestStatelessUpdate extends BaseTestCase {
     // assert
     Assert.assertEquals(customer.getUpdtime().getTime(), result.getUpdtime().getTime());
   }
+
+  /**
+   * Many relations mustn't be deleted when having a {@link com.avaje.ebean.event.BeanPersistAdapter} which is accessing this many field.
+   */
+  @Test
+  public void testStatelessUpdateWithPersistAdapterAndIgnoreNullValues() {
+
+    // arrange
+    Contact contact = new Contact();
+    contact.setFirstName("wobu :P");
+
+    Customer customer = new Customer();
+    customer.setName("something");
+    customer.setContacts(new ArrayList<Contact>());
+    customer.getContacts().add(contact);
+
+    server.save(customer);
+
+    // act
+    Customer customerWithChange = new Customer();
+    customerWithChange.setId(customer.getId());
+    customerWithChange.setName("new name");
+
+    server.update(customerWithChange, null, null, true, false);
+
+    Customer result = Ebean.find(Customer.class, customer.getId());
+
+    // assert
+    Assert.assertNotNull(result.getContacts());
+    Assert.assertFalse("the contacts mustn't be deleted", result.getContacts().isEmpty());
+  }
 }