More detailed exception on persist errors

ebean-core/src/main/java/io/ebeaninternal/server/persist/dml/DmlBeanPersister.java

@@ -4,6 +4,7 @@ import io.ebean.config.dbplatform.DatabasePlatform;
 import io.ebean.util.StringHelper;
 import io.ebeaninternal.server.core.PersistRequestBean;
 import io.ebeaninternal.server.persist.BeanPersister;
+import io.ebeaninternal.server.type.DataBindCapture;
 
 import java.sql.SQLException;
 
@@ -70,7 +71,7 @@ final class DmlBeanPersister implements BeanPersister {
       }
     } catch (SQLException e) {
       // log the error to the transaction log
-      String msg = "Error[" + StringHelper.removeNewLines(e.getMessage()) + "]";
+      String msg = "Error[" + StringHelper.removeNewLines(e.getMessage()) + "] " + handler;
       if (request.transaction().isLogSummary()) {
         request.transaction().logSummary(msg);
       }

ebean-core/src/main/java/io/ebeaninternal/server/persist/dml/DmlHandler.java

@@ -259,4 +259,14 @@ public abstract class DmlHandler implements PersistHandler, BindableRequest {
     return stmt;
   }
 
+  @Override
+  public String toString() {
+    if (sql == null) {
+      return "not yet initialized";
+    } else if (bindLog == null || bindLog.length() == 0) {
+      return sql;
+    } else {
+      return Str.add(sql, " -- bind(", bindLog.toString(), ")");
+    }
+  }
 }

ebean-test/src/test/java/org/tests/insert/TestInsertDataIntegrityException.java

@@ -5,11 +5,13 @@ import io.ebean.DB;
 import io.ebean.DataIntegrityException;
 import io.ebean.xtest.IgnorePlatform;
 import io.ebean.annotation.Platform;
+import org.assertj.core.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.tests.model.basic.Customer;
 import org.tests.model.basic.Order;
 import org.tests.model.basic.ResetBasicData;
 
+import static org.assertj.core.api.AssertionsForClassTypes.assertThatThrownBy;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 public class TestInsertDataIntegrityException extends BaseTestCase {
@@ -26,7 +28,10 @@ public class TestInsertDataIntegrityException extends BaseTestCase {
     Order order = new Order();
     order.setStatus(Order.Status.NEW);
     order.setCustomer(invalidCustomer);
+    assertThatThrownBy(() -> DB.save(order))
+      .isInstanceOf(DataIntegrityException.class)
+      .hasMessageContaining("insert into o_order")
+      .hasMessageContaining(",900000");
 
-    assertThrows(DataIntegrityException.class, () -> DB.save(order));
   }
 }