将消息添加到视图时,视图架构无效 XML

Invalid XML for View Architecture when adding messages into views

我想将消息添加到我的模块中, 我继承了mail.threadclass:

inherit= ['mail.thread','ir.needaction_mixin']

并制作了所需的依赖项:

'depends': ['base','mail']

一切正常,但是当我添加这四行代码以将消息添加到我的模块中时:

<record id="travel_info_view" model="ir.ui.view">
            <field name="name">travel.info.view</field>
             <field name="type">form</field>
             <field name="model">travel.info</field>
             <field name="arch" type="xml">
                <form string="travel.info" version="7.0">

                   <sheet>

                       ----

                   </sheet>

                    <div class="oe_chatter">
                          <field name="message_follower_ids" widget="mail_followers" groups="base.group_user"/>
                          <field name="message_ids" widget="mail_thread"/>
                    </div>

             </form>


        </field>
        </record>

出现错误: ('ValidateError',u'验证字段 arch 时发生错误:视图架构无效 XML!')

这是什么原因??

我发现了错误,是继承的拼写错误

我写了:

继承= ['mail.thread','ir.needaction_mixin']

正确的是:

_inherit = 'mail.thread'