FIX: correct caching when collection with different inherited beans is put to the cache (#1379)

* FIX: correct cahcing when collection with different inherited beans is put to the cache

* removed some sysouts

src/test/java/org/tests/inheritance/cache/TestInheritanceRefCache.java

@@ -4,10 +4,14 @@ import io.ebean.BaseTestCase;
 import io.ebean.Ebean;
 import org.tests.model.basic.cache.CInhOne;
 import org.tests.model.basic.cache.CInhRef;
+import org.tests.model.basic.cache.CInhRoot;
+import org.tests.model.basic.cache.CInhTwo;
 import org.junit.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.*;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import org.ebeantest.LoggedSqlCollector;
@@ -61,4 +65,47 @@ public class TestInheritanceRefCache extends BaseTestCase {
     assertThat(sql).hasSize(0);
 
   }
+
+  @Test
+  public void testMap() {
+
+    List<Integer> ids = new ArrayList<>();
+
+    CInhOne one = new CInhOne();
+    one.setLicenseNumber("O19");
+    one.setDriver("Foo");
+    one.setNotes("Hello");
+    Ebean.save(one);
+
+    ids.add(one.getId());
+
+    CInhTwo two = new CInhTwo();
+    two.setLicenseNumber("T23");
+    two.setAction("Test");
+    Ebean.save(two);
+
+    ids.add(two.getId());
+
+
+    LoggedSqlCollector.start();
+
+    Ebean.find(CInhRoot.class).setUseQueryCache(true).where().idIn(ids).setMapKey("licenseNumber").findMap();
+
+    List<String> sql = LoggedSqlCollector.stop();
+    assertThat(sql).hasSize(1);
+    assertThat(sql.get(0)).contains("from cinh_root");
+
+    // try some cache finds
+    Ebean.find(CInhRoot.class).setUseQueryCache(true).findList();
+    Ebean.find(CInhRoot.class).setUseQueryCache(true).findList();
+    Ebean.find(CInhRoot.class).setUseQueryCache(true).findList();
+
+    LoggedSqlCollector.start();
+
+    Ebean.find(CInhRoot.class).setUseQueryCache(true).where().idIn(ids).setMapKey("licenseNumber").findMap();
+
+    sql = LoggedSqlCollector.stop();
+    assertThat(sql).hasSize(0);
+  }
+
 }

src/test/java/org/tests/model/basic/cache/CInhRoot.java

@@ -7,7 +7,7 @@ import javax.persistence.DiscriminatorColumn;
 import javax.persistence.Entity;
 import javax.persistence.Inheritance;
 
-@Cache
+@Cache(enableQueryCache = true)
 @Entity
 @Inheritance
 @DiscriminatorColumn(length = 3)