From f88524b34cebc1d183aa368db3e7e20fe8611cb7 Mon Sep 17 00:00:00 2001
From: Rob Bygrave <robin.bygrave@gmail.com>
Date: Mon, 30 Jun 2014 22:03:31 +1200
Subject: [PATCH] Fix for #156 - NPE in DDL Generation when Embedded bean as
 column with unique constraint

---
 .../server/ddl/CreateTableColumnVisitor.java           | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/avaje/ebeaninternal/server/ddl/CreateTableColumnVisitor.java b/src/main/java/com/avaje/ebeaninternal/server/ddl/CreateTableColumnVisitor.java
index ad9f76793..9992be251 100644
--- a/src/main/java/com/avaje/ebeaninternal/server/ddl/CreateTableColumnVisitor.java
+++ b/src/main/java/com/avaje/ebeaninternal/server/ddl/CreateTableColumnVisitor.java
@@ -30,6 +30,8 @@ public class CreateTableColumnVisitor extends BaseTablePropertyVisitor {
 
   private final CreateTableVisitor parent;
 
+  private BeanPropertyAssocOne<?> embedded;
+  
   public CreateTableColumnVisitor(CreateTableVisitor parent, DdlGenContext ctx) {
     this.parent = parent;
     this.ctx = ctx;
@@ -68,6 +70,7 @@ public class CreateTableColumnVisitor extends BaseTablePropertyVisitor {
   @Override
   public void visitEmbeddedScalar(BeanProperty p, BeanPropertyAssocOne<?> embedded) {
 
+    this.embedded = embedded;
     visitScalar(p);
   }
 
@@ -184,7 +187,12 @@ public class CreateTableColumnVisitor extends BaseTablePropertyVisitor {
 
   private String createUniqueConstraint(BeanProperty p) {
 
-    StringBuilder expr = createUniqueConstraintBuffer(p.getBeanDescriptor().getBaseTable(), p.getDbColumn());
+    String baseTable = p.getBeanDescriptor().getBaseTable();
+    if (baseTable == null) {
+      // Embedded bean property that has unique constraint on it
+      baseTable = embedded.getBeanDescriptor().getBaseTable();
+    }
+    StringBuilder expr = createUniqueConstraintBuffer(baseTable, p.getDbColumn());
 
     expr.append(p.getDbColumn()).append(")");
     return expr.toString();