Python 在Odoo 13中，我如何限制访问在线学习幻灯片？

我正在尝试构建一个功能，要求那些在odoo中注册在线学习课程的人在能够访问下一个类别之前完成上一个类别

下面是我的python代码，它构建了一个允许访问给定幻灯片的布尔值

class Slide(models.Model):
    _inherit = 'slide.slide'

    def _previous_category_complete(self):
        for slide in self.filtered(lambda s: s.category_id):
            slide.previous_category_complete = slide.previous_category_complete()

    previous_category_complete = fields.Boolean('Previous Category Complete', compute=_previous_category_complete)

    def all_quizes_complete(self):
        partner_id = self.env.user.partner_id
        quizes_in_category = self.env['slide.slide'].search([('category_id','=',self.id),('slide_type','=','quiz')])
        quizes_partner_relation = self.env['slide.slide.partner'].search([
                                    ('partner_id','=',partner_id.id),
                                    ('slide_id','in',quizes_in_category.mapped('id'))]) if quizes_in_category else False
        if quizes_partner_relation:
            return all(quiz.complete for quiz in quizes_partner_relation)
        return self.previous_category_complete()

    def previous_category_complete(self):
        previous_category = self.env['slide.slide'].search([
            ('category_id','=',False),
            ('channel_id','=',self.channel_id),
            ('sequence', '<', self.category_id.sequence)]).sorted('sequence', reverse=True)[0]
        return previous_category.all_quizes_complete() if previous_category else True

  <template id="mdlu_lesson_card" inherit_id='website_slides.lesson_card'>
    <xpath expr="//t[@t-set='can_access']" position="replace">
      <t t-set="can_access" t-value="slide.previous_category_complete and slide.is_preview or channel.is_member or channel.can_publish "/>
    </xpath>
  </template>

  <template id="mdlu_slide_fullscreen_sidebar_category" inherit_id='website_slides.slide_fullscreen_sidebar_category'>
    <xpath expr="//t[@t-set='can_access']" position="replace">
      <t t-set="can_access" t-value="slide.previous_category_complete and slide.is_preview or channel.is_member or channel.can_publish "/>
    </xpath>
  </template>

  <template id="mdlu_slide_aside_training_category" inherit_id='website_slides.slide_aside_training_category'>
    <xpath expr="//t[@t-set='can_access']" position="replace">
      <t t-set="can_access" t-value="slide.previous_category_complete and slide.is_preview or channel.is_member or channel.can_publish "/>
    </xpath>
  </template>

如果我使用

或
，我会得到：

Error:


Traceback:
TypeError: Cannot read property 'slug' of undefined
    at Class._pushUrlState (http://192.168.1.19:8069/web/content/1107-ab2dd33/1/web.assets_frontend_lazy.js:477:355)
    at Class._onChangeSlide (http://192.168.1.19:8069/web/content/1107-ab2dd33/1/web.assets_frontend_lazy.js:481:101)
    at http://192.168.1.19:8069/web/content/1107-ab2dd33/1/web.assets_frontend_lazy.js:475:70

有人能帮我解决这个问题吗？
您没有记录集的“
频道”中的问题。因此，在另一个字段（如channel.is_member）中访问该模型将不起作用。尽管您可以添加这样的条件

<t t-set="can_access" t-value="slide.previous_category_complete and slide.is_preview or channel and (channel.is_member or channel.can_publish)"/>



确保您拥有频道的id，以后您可以访问属于同一型号的所有字段。
网站\u幻灯片中未定义频道
。幻灯片\u全屏\u侧边栏\u类别
，要访问频道属性，您需要使用
幻灯片.channel\u id
参考

在
can\u access
变量之前定义，您可以使用它代替
slide.channel\u id.is\u member

在呈现
网站\u幻灯片时，Odoo将引发相同的错误。幻灯片\u放在一边\u培训\u类别
模板

要修复该错误，您只需将两个模板中的
频道
替换为
slide.channel\u id
，如下所示：

幻灯片\u全屏\u侧边栏\u类别

这修复了错误。非常感谢。谢谢你帮我纠正错误。但我无法触发变量。我是不是找错地方了？哪个变量？如果需要在某些字段值更改时触发计算，则需要使用decorator指定这些字段。
<t t-set="can_access" t-value="slide.previous_category_complete and slide.is_preview or channel and (channel.is_member or channel.can_publish)"/>

<template id="mdlu_slide_fullscreen_sidebar_category" inherit_id='website_slides.slide_fullscreen_sidebar_category'>
    <xpath expr="//t[@t-set='can_access']" position="replace">
        <t t-set="can_access" t-value="slide.previous_category_complete and slide.is_preview or is_member or slide.channel_id.can_publish "/>
    </xpath>
</template>  

<template id="mdlu_slide_aside_training_category" inherit_id='website_slides.slide_aside_training_category'>
    <xpath expr="//t[@t-set='can_access']" position="replace">
        <t t-set="can_access" t-value="slide.previous_category_complete and slide.is_preview or is_member or slide.channel_id.can_publish "/>
    </xpath>
</template>

previous_category_complete = fields.Boolean(string='Previous Category Complete',
                                            compute='_previous_category_complete')