#809 - Add test / example showing ... transaction.setPersistCascade(false) and transaction.commitAndContinue();

src/test/java/com/avaje/tests/transaction/TestBeanStateReset.java

@@ -2,6 +2,7 @@ package com.avaje.tests.transaction;
 
 import com.avaje.ebean.BaseTestCase;
 import com.avaje.ebean.Ebean;
+import com.avaje.ebean.Transaction;
 import com.avaje.tests.model.m2m.MnyB;
 import com.avaje.tests.model.m2m.MnyC;
 import org.avaje.ebeantest.LoggedSqlCollector;
@@ -13,6 +14,7 @@ import javax.persistence.PersistenceException;
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertNotNull;
 
 public class TestBeanStateReset extends BaseTestCase {
 
@@ -47,4 +49,51 @@ public class TestBeanStateReset extends BaseTestCase {
     }
 
   }
+
+  @Test
+  public void alternativeVia_persistCascadeOff_with_commitAndContinue() {
+
+    // setup to fail foreign key constraint when using cascade save
+    MnyC c = new MnyC();
+    c.setId(Long.MAX_VALUE);
+
+    MnyB b = new MnyB();
+    b.getCs().add(c);
+
+    Transaction transaction = Ebean.beginTransaction();
+
+    try {
+      // turn off cascade ...
+      transaction.setPersistCascade(false);
+      b.save();
+
+      // commit at this point
+      transaction.commitAndContinue();
+      try {
+
+        // turn on cascade ... such that the ManyToMany is persisted
+        transaction.setPersistCascade(true);
+
+        // save b again which this time cascades to the ManyToMany
+        // but this fails due to FK on ManyToMany
+        b.save();
+
+        // we actually don't get here due to the FK error
+        transaction.commit();
+
+      } catch (PersistenceException e) {
+        // so we failed the second save but that is ok'ish
+        // we handle this exception knowing b got inserted and committed
+        // and that the inserts into the intersection table failed
+        logger.info("The ManyToMany intersection error: " + e.getMessage());
+      }
+    } finally {
+      // performs a rollback as the commit at line:80 does not happen
+      transaction.end();
+    }
+
+    // assert our insert prior to the commitAndContinue succeeded
+    MnyB madeIt = Ebean.find(MnyB.class, b.getId());
+    assertNotNull(madeIt);
+  }
 }