#291 - ENH: Add ability to validate a query or property expression - Was Please check column exist on entity

src/test/java/com/avaje/ebean/plugin/SpiServerTest.java

@@ -26,6 +26,13 @@ public class SpiServerTest {
     assertNull(beanType.getPersistListener());
     assertNull(beanType.getQueryAdapter());
 
+    assertTrue(beanType.isValidExpression("name"));
+    assertTrue(beanType.isValidExpression("contacts.firstName"));
+    assertTrue(beanType.isValidExpression("contacts.group.name"));
+    assertFalse(beanType.isValidExpression("junk"));
+    assertFalse(beanType.isValidExpression("Name"));
+    assertFalse(beanType.isValidExpression("contacts.name"));
+
     Customer customer = new Customer();
     customer.setId(42);
 

src/test/java/com/avaje/ebeaninternal/api/TDSpiEbeanServer.java

@@ -292,6 +292,11 @@ public class TDSpiEbeanServer implements SpiEbeanServer {
     return null;
   }
 
+  @Override
+  public <T> Set<String> validateQuery(Query<T> query) {
+    return null;
+  }
+
   @Override
   public Object nextId(Class<?> beanType) {
     return null;

src/test/java/com/avaje/tests/query/orderby/TestOrderByWithDistinct.java

@@ -1,7 +1,10 @@
 package com.avaje.tests.query.orderby;
 
 import java.util.List;
+import java.util.Set;
 
+import com.avaje.tests.model.basic.Customer;
+import com.avaje.tests.model.basic.ResetBasicData;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -12,9 +15,29 @@ import com.avaje.tests.model.basic.MRole;
 import com.avaje.tests.model.basic.MUser;
 import com.avaje.tests.model.basic.MUserType;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 
 public class TestOrderByWithDistinct extends BaseTestCase {
-	
+
+  @Test
+  public void testOrderByValidation() {
+
+    ResetBasicData.reset();
+
+    Query<Customer> query = Ebean.find(Customer.class)
+        .where()
+          .eq("junk","blah")
+          .eq("name","jim")
+        .orderBy("id desc,path.that.does.not.exist,contacts.group.name asc");
+
+    Set<String> unknownProperties = query.validate();
+    assertThat(unknownProperties).isNotEmpty();
+    assertThat(unknownProperties).hasSize(2);
+    assertThat(unknownProperties).contains("junk","path.that.does.not.exist");
+
+  }
+
 	@Test
 	public void test() {
 		/*