odoo_/cat_app/views/library_menu.xml

<odoo>
    <!-- Library App Menu -->
    <menuitem id="menu_library" name="Library" />
    <!-- 打开图书列表的动作 -->
    <record id="action_library_book" model="ir.actions.act_window">
        <field name="name">Library Books</field>
        <field name="res_model">library.book</field>
        <field name="view_mode">tree,form</field>
    </record>
    <!-- 打开图书列表的菜单 -->
    <menuitem id="menu_library_book"
              name="Books"
              parent="menu_library"
              action="action_library_book" />
</odoo>