Default to drop-and-create for DevServices

extensions/hibernate-orm/deployment/src/main/java/io/quarkus/hibernate/orm/deployment/HibernateOrmProcessor.java

@@ -41,6 +41,7 @@
 import javax.persistence.spi.PersistenceUnitTransactionType;
 import javax.transaction.TransactionManager;
 
+import org.eclipse.microprofile.config.ConfigProvider;
 import org.hibernate.MultiTenancyStrategy;
 import org.hibernate.boot.archive.scan.spi.ClassDescriptor;
 import org.hibernate.boot.archive.scan.spi.PackageDescriptor;
@@ -87,12 +88,14 @@
 import io.quarkus.deployment.builditem.ApplicationArchivesBuildItem;
 import io.quarkus.deployment.builditem.BytecodeTransformerBuildItem;
 import io.quarkus.deployment.builditem.CombinedIndexBuildItem;
+import io.quarkus.deployment.builditem.DevServicesLauncherConfigResultBuildItem;
 import io.quarkus.deployment.builditem.FeatureBuildItem;
 import io.quarkus.deployment.builditem.GeneratedClassBuildItem;
 import io.quarkus.deployment.builditem.HotDeploymentWatchedFileBuildItem;
 import io.quarkus.deployment.builditem.LaunchModeBuildItem;
 import io.quarkus.deployment.builditem.LiveReloadBuildItem;
 import io.quarkus.deployment.builditem.LogCategoryBuildItem;
+import io.quarkus.deployment.builditem.RunTimeConfigurationDefaultBuildItem;
 import io.quarkus.deployment.builditem.ServiceStartBuildItem;
 import io.quarkus.deployment.builditem.SystemPropertyBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.NativeImageProxyDefinitionBuildItem;
@@ -177,6 +180,55 @@ void includeArchivesHostingEntityPackagesInIndex(HibernateOrmConfig hibernateOrm
         }
     }
 
+    @BuildStep
+    void devServicesAutoGenerateByDefault(DevServicesLauncherConfigResultBuildItem devServicesResult,
+            List<JdbcDataSourceSchemaReadyBuildItem> schemaReadyBuildItems,
+            HibernateOrmConfig config,
+            BuildProducer<RunTimeConfigurationDefaultBuildItem> runTimeConfigurationDefaultBuildItemBuildProducer) {
+        if (!schemaReadyBuildItems.isEmpty()) {
+            //we don't want to enable auto generation if somebody else is managing the schema
+            return;
+        }
+        String dsName;
+        if (config.defaultPersistenceUnit.datasource.isEmpty()) {
+            dsName = "quarkus.datasource.username";
+        } else {
+            dsName = "quarkus.datasource." + config.defaultPersistenceUnit.datasource.get() + ".username";
+        }
+
+        if (ConfigProvider.getConfig().getOptionalValue(dsName, String.class).isEmpty()) {
+            if (devServicesResult.getConfig().containsKey(dsName)) {
+                if (ConfigProvider.getConfig().getOptionalValue("quarkus.hibernate-orm.database.generation", String.class)
+                        .isEmpty()) {
+                    LOG.info(
+                            "Setting quarkus.hibernate-orm.database.generation=drop-and-create to initialize Dev Services managed database");
+                    runTimeConfigurationDefaultBuildItemBuildProducer.produce(new RunTimeConfigurationDefaultBuildItem(
+                            "quarkus.hibernate-orm.database.generation", "drop-and-create"));
+                }
+            }
+        }
+
+        for (Entry<String, HibernateOrmConfigPersistenceUnit> entry : config.persistenceUnits.entrySet()) {
+
+            if (entry.getValue().datasource.isEmpty()) {
+                dsName = "quarkus.datasource.jdbc.url";
+            } else {
+                dsName = "quarkus.datasource." + entry.getValue().datasource.get() + ".username";
+            }
+            if (ConfigProvider.getConfig().getOptionalValue(dsName, String.class).isEmpty()) {
+                if (devServicesResult.getConfig().containsKey(dsName)) {
+                    String propertyName = "quarkus.hibernate-orm." + entry.getKey() + ".database.generation";
+                    if (ConfigProvider.getConfig().getOptionalValue(propertyName, String.class).isEmpty()) {
+                        LOG.info("Setting " + propertyName + "=drop-and-create to initialize Dev Services managed database");
+                        runTimeConfigurationDefaultBuildItemBuildProducer
+                                .produce(new RunTimeConfigurationDefaultBuildItem(propertyName, "drop-and-create"));
+                    }
+                }
+            }
+        }
+
+    }
+
     @BuildStep
     AdditionalIndexedClassesBuildItem addPersistenceUnitAnnotationToIndex() {
         return new AdditionalIndexedClassesBuildItem(ClassNames.QUARKUS_PERSISTENCE_UNIT.toString());

extensions/hibernate-orm/runtime/src/main/java/io/quarkus/hibernate/orm/runtime/HibernateOrmRuntimeConfigPersistenceUnit.java

@@ -72,6 +72,9 @@ public static class HibernateOrmConfigPersistenceUnitDatabaseGeneration {
          *
          * `drop-and-create` is awesome in development mode.
          *
+         * This defaults to 'none', however if Dev Services is in use and no other extensions that manage the schema are present
+         * this will default to 'drop-and-create'.
+         *
          * Accepted values: `none`, `create`, `drop-and-create`, `drop`, `update`, `validate`.
          */
         @ConfigItem(name = ConfigItem.PARENT, defaultValue = "none")

extensions/panache/hibernate-orm-panache/deployment/src/test/java/io/quarkus/hibernate/orm/panache/deployment/test/PanacheJAXBTest.java

@@ -17,6 +17,7 @@
 import javax.xml.bind.annotation.XmlTransient;
 
 import org.jboss.shrinkwrap.api.ShrinkWrap;
+import org.jboss.shrinkwrap.api.asset.StringAsset;
 import org.jboss.shrinkwrap.api.spec.JavaArchive;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.RegisterExtension;
@@ -30,7 +31,9 @@ public class PanacheJAXBTest {
     @RegisterExtension
     static QuarkusUnitTest runner = new QuarkusUnitTest()
             .setArchiveProducer(() -> ShrinkWrap.create(JavaArchive.class)
-                    .addClasses(JAXBEntity.class, JAXBTestResource.class));
+                    .addClasses(JAXBEntity.class, JAXBTestResource.class)
+                    .addAsResource(new StringAsset("quarkus.hibernate-orm.database.generation=none"),
+                            "application.properties"));
 
     @Test
     public void testJaxbAnnotationTransfer() throws Exception {

extensions/panache/hibernate-orm-panache/deployment/src/test/resources/application-erroneous-multiple-persistence-units.properties

@@ -1,5 +1,5 @@
 quarkus.datasource.db-kind=h2
-quarkus.datasource.jdbc.url=jdbc:h2:mem:default;DB_CLOSE_DELAY=-1
+quarkus.datasource.jdbc.url=jdbc:h2:mem:first;DB_CLOSE_DELAY=-1
 
 quarkus.datasource.second.db-kind=h2
 quarkus.datasource.second.jdbc.url=jdbc:h2:mem:second;DB_CLOSE_DELAY=-1

extensions/panache/hibernate-orm-panache/deployment/src/test/resources/application-multiple-persistence-units-for-repository.properties

@@ -1,5 +1,5 @@
 quarkus.datasource.db-kind=h2
-quarkus.datasource.jdbc.url=jdbc:h2:mem:default;DB_CLOSE_DELAY=-1
+quarkus.datasource.jdbc.url=jdbc:h2:mem:first;DB_CLOSE_DELAY=-1
 
 quarkus.datasource.repository.db-kind=h2
 quarkus.datasource.repository.jdbc.url=jdbc:h2:mem:repository;DB_CLOSE_DELAY=-1

extensions/panache/hibernate-orm-panache/deployment/src/test/resources/application-multiple-persistence-units.properties

@@ -1,5 +1,5 @@
 quarkus.datasource.db-kind=h2
-quarkus.datasource.jdbc.url=jdbc:h2:mem:default;DB_CLOSE_DELAY=-1
+quarkus.datasource.jdbc.url=jdbc:h2:mem:first;DB_CLOSE_DELAY=-1
 
 quarkus.datasource.second.db-kind=h2
 quarkus.datasource.second.jdbc.url=jdbc:h2:mem:second;DB_CLOSE_DELAY=-1