Attempt to create test case for #281 - test case not failing

src/main/java/com/avaje/ebeaninternal/server/deploy/meta/DeployBeanDescriptor.java

@@ -729,6 +729,9 @@ public class DeployBeanDescriptor<T> {
       return null;
     }
     String selectClause = sb.toString();
+    if (selectClause.length() == 0) {
+      throw new IllegalStateException("Bean " + getFullName() + " has no properties?");
+    }
     return selectClause.substring(0, selectClause.length() - 1);
   }
 

src/test/java/com/avaje/tests/inheritance/InnerReport.java

@@ -0,0 +1,43 @@
+package com.avaje.tests.inheritance;
+
+import javax.persistence.*;
+
+/**
+ */
+@Entity
+public class InnerReport {
+
+  @Id
+  Long id;
+
+  String name;
+
+  @OneToOne
+  Forecast forecast;
+
+  public Forecast getForecast() {
+    return forecast;
+  }
+
+  public void setForecast(Forecast forecast) {
+    this.forecast = forecast;
+  }
+
+
+  @Entity
+  @DiscriminatorValue("F")
+  public static class Forecast extends Stockforecast {
+
+    @ManyToOne
+    InnerReport innerReport;
+
+    public InnerReport getInnerReport() {
+      return innerReport;
+    }
+
+    public void setInnerReport(InnerReport innerReport) {
+      this.innerReport = innerReport;
+    }
+  }
+
+}

src/test/java/com/avaje/tests/inheritance/Stockforecast.java

@@ -0,0 +1,21 @@
+package com.avaje.tests.inheritance;
+
+import javax.persistence.*;
+
+
+@Entity
+@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
+@DiscriminatorColumn(name = "type", discriminatorType = DiscriminatorType.STRING)
+public abstract class Stockforecast {
+
+  @Id
+  private Long id;
+
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+}

src/test/java/com/avaje/tests/inheritance/TestNpeOnDiscriminator.java

@@ -0,0 +1,23 @@
+package com.avaje.tests.inheritance;
+
+import com.avaje.ebean.BaseTestCase;
+import com.avaje.ebean.Ebean;
+import org.junit.Test;
+
+public class TestNpeOnDiscriminator extends BaseTestCase {
+
+  @Test
+  public void test() {
+
+    InnerReport report = Ebean.json().toBean(InnerReport.class, "{}");
+    Ebean.save(report);
+
+    // other service ...
+    InnerReport.Forecast f = new InnerReport.Forecast();
+    report.setForecast(f);
+    f.innerReport = report;
+
+    Ebean.save(f);
+
+  }
+}