i 想要为我的申请建立一个有以下要求的《欧洲空间法》系统。

1. Users will be assigned single or multiple role. (Admin, Staff) etc.
2. Role will have permissions.(Send_Invoices, Send_mail, Delete_Invoices, Send_Estimate) etc.
3. User will be assigned custom permission apart from the role it inherits.

我的数据库结构如下:

role:
+----------+-------------+------+-----+---------+----------------+
| Field    | Type        | Null | Key | Default | Extra          |
+----------+-------------+------+-----+---------+----------------+
| id       | int(11)     | NO   | PRI | NULL    | auto_increment |
| roleName | varchar(50) | NO   | UNI | NULL    |                |
+----------+-------------+------+-----+---------+----------------+
permission:
+----------------+-------------+------+-----+---------+----------------+
| Field          | Type        | Null | Key | Default | Extra          |
+----------------+-------------+------+-----+---------+----------------+
| id             | int(11)     | NO   | PRI | NULL    | auto_increment |
| permissionName | varchar(50) | NO   |     | NULL    |                |
| permissionKey  | varchar(50) | NO   | UNI | NULL    |                |
+----------------+-------------+------+-----+---------+----------------+
role_permission
+---------------+---------+------+-----+---------+----------------+
| Field         | Type    | Null | Key | Default | Extra          |
+---------------+---------+------+-----+---------+----------------+
| id            | int(11) | NO   | PRI | NULL    | auto_increment |
| role_id       | int(11) | NO   | MUL | NULL    |                |
| permission_id | int(11) | NO   |     | NULL    |                |
+---------------+---------+------+-----+---------+----------------+
user_role
+---------------+---------+------+-----+---------+----------------+
| Field         | Type    | Null | Key | Default | Extra          |
+---------------+---------+------+-----+---------+----------------+
| id            | int(11) | NO   | PRI | NULL    | auto_increment |
| user_id       | int(11) | NO   | MUL | NULL    |                |
| role_id       | int(11) | NO   |     | NULL    |                |
+---------------+---------+------+-----+---------+----------------+
user_permission
+---------------+---------+------+-----+---------+----------------+
| Field         | Type    | Null | Key | Default | Extra          |
+---------------+---------+------+-----+---------+----------------+
| id            | int(11) | NO   | PRI | NULL    | auto_increment |
| user_id       | int(11) | NO   | MUL | NULL    |                |
| permission_id | int(11) | NO   |     | NULL    |                |
+---------------+---------+------+-----+---------+----------------+

i) 移至Zend Framework,在决定Zentd_Acl时存在问题,使我得以实施目前的结构。 我的问题是。

1. is it possible for me to implement the ACL with current database structure to do the needful in Zend Framework?
2. is there any better implementation that could allow me to achieve what i want in zend framework?

i 如果有人能向我提供一种办法,开始做我需要做的事情,将不胜感激。 能够帮助我的任何资源、联系?

谢谢。