## 界面权限
----
* view级别
~~~
<record id="staff_leave_tree" model="ir.ui.view">
<field name="name">staff.leave.tree</field>
<field name="model">staff.leave</field>
<field name="group_id" ref="staff.hr_senior_groups"></field>
<field name="arch" type="xml">
<tree string="请假单">
...
</tree>
</field>
</record>
~~~
* 元素级别
~~~
<button name="leave_done" states="draft" string="审核" type="object"
class="oe_highlight" groups="staff.hr_senior_groups"/>
~~~
