Zend_Tool，create db-table.from-database在项目中不起作用（找不到模块）

I have a Zend Framework project with an existing database, so I'd like to create models based on the tables that I have in my database. I can run zf commands from the command-line and in Netbeans just fine, for example generating controllers/forms works just fine. However, when I want to create the model from the database using the commandI have a Zend Framework project with an existin