Index: lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/persistence/ForumDao.java
===================================================================
diff -u -raaca44f485c3bacc6c866f7df28c0511061473d6 -r69b42721943dd9b418ac624d16b7f239dc12ed99
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/persistence/ForumDao.java	(.../ForumDao.java)	(revision aaca44f485c3bacc6c866f7df28c0511061473d6)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/persistence/ForumDao.java	(.../ForumDao.java)	(revision 69b42721943dd9b418ac624d16b7f239dc12ed99)
@@ -20,11 +20,15 @@
 	public Forum getById(Long forumId) {
 		return (Forum) getHibernateTemplate().get(Forum.class,forumId);
 	}
-
+	/**
+	 * NOTE: before call this method, must be sure delete all messages in this forum.
+	 * Example code like this:
+	 * <pre>
+	 * <code>messageDao.deleteForumMessage(forum.getUuid());</code>
+	 * </pre>
+	 * @param forum
+	 */
 	public void delete(Forum forum) {
-		//TODO: delete this forum message
-//		this.getHibernateTemplate().
-//		this.getSession().createQuery()
 		this.getHibernateTemplate().delete(forum);
 	}
 
Index: lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/persistence/MessageDao.java
===================================================================
diff -u -raaca44f485c3bacc6c866f7df28c0511061473d6 -r69b42721943dd9b418ac624d16b7f239dc12ed99
--- lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/persistence/MessageDao.java	(.../MessageDao.java)	(revision aaca44f485c3bacc6c866f7df28c0511061473d6)
+++ lams_tool_forum/src/java/org/lamsfoundation/lams/tool/forum/persistence/MessageDao.java	(.../MessageDao.java)	(revision 69b42721943dd9b418ac624d16b7f239dc12ed99)
@@ -34,4 +34,14 @@
 		return this.getHibernateTemplate().findByNamedQuery(name, forumId);
 	}
 
+	/**
+	 * Delete all messages in special forum.
+	 * @param forumUuid 
+	 * 		The forum UUID which messages will be deleted in this method.
+	 */
+	public void deleteForumMessage(Long forumUuid) {
+		List list = findByNamedQuery("allMessagesByForum",forumUuid);
+		this.getHibernateTemplate().deleteAll(list);
+	}
+
 }
Index: lams_tool_forum/test/java/org/lamsfoundation/lams/tool/forum/persistence/MessageTest.java
===================================================================
diff -u -raaca44f485c3bacc6c866f7df28c0511061473d6 -r69b42721943dd9b418ac624d16b7f239dc12ed99
--- lams_tool_forum/test/java/org/lamsfoundation/lams/tool/forum/persistence/MessageTest.java	(.../MessageTest.java)	(revision aaca44f485c3bacc6c866f7df28c0511061473d6)
+++ lams_tool_forum/test/java/org/lamsfoundation/lams/tool/forum/persistence/MessageTest.java	(.../MessageTest.java)	(revision 69b42721943dd9b418ac624d16b7f239dc12ed99)
@@ -110,10 +110,12 @@
 
 
         //delete
+        
         messageDao.delete(reloaded);
+        messageDao.deleteForumMessage(forum.getUuid());
         dao.delete(forum);
-//        assertNull("message object not deleted", messageDao.getById(message.getUuid()));
-//        assertNull("reply message object not deleted", messageDao.getById(message2.getUuid()));
+        assertNull("message object not deleted", messageDao.getById(message.getUuid()));
+        assertNull("reply message object not deleted", messageDao.getById(message2.getUuid()));
     }
 
     protected void tearDown() throws Exception {