django 权限设置 左侧菜单点击显示，面包屑

1.左侧菜单点击显示 就是在点击的时候保留点击的功能

方法。

1.加入新的字段，pid来判断

class Permission(models.Model):
    """
    权限表
    """
    title = models.CharField(max_length=32, verbose_name='标题')
    url = models.CharField(max_length=32, verbose_name='权限')
    menu=models.ForeignKey("Menu",on_delete=models.CASCADE,null=True)
    name=models.CharField(max_length=32,verbose_name='url别名',default="")
    pid=models.ForeignKey('self',on_delete=models.CASCADE,null=True,verbose_name="父权限")

2.写入数据

3.在中间件添加

        request.breadcrumb =[
            {
                "title" :"首页",
                "url" :"/"
            },
        ]
        for item in permission_list:
            reg ="^%s$" %item["url"]
            ret =re.search(reg ,current_path)
            if ret:
                show_id =item["pid"] or item["id"]
                request.show_id =show_id

根据pid和pk判断，通过request。show-id传递到 过滤器

4.在过滤器中通过是否有

@register.inclusion_tag("rbac/menu.html")
def get_menu_styles(request):
    permission_menu_dict = request.session.get("permission_menu_dict")
    print("permission_menu_dict", permission_menu_dict)

    for val in permission_menu_dict.values():
        for item in val["children"]:
            val["class"] = "hide"
            # /payment/
            # /payment/edit/4/
            # ret=re.search("^{}$".format(item["url"]),request.path)
            if request.show_id == item["pk"]:
                val["class"] = ""

    return {"permission_menu_dict": permission_menu_dict}

二

面包屑

1.在中间件中找到渲染在页面的的字典

        request.breadcrumb =[
            {
                "title" :"首页",
                "url" :"/"
            },
        ]
        for item in permission_list:
            reg ="^%s$" %item["url"]
            ret =re.search(reg ,current_path)
            if ret:
                show_id =item["pid"] or item["id"]
                request.show_id =show_id

                # 确定面包屑列表
                if item["pid"]:
                    ppermission =Permission.objects.filter(pk=item["pid"]).first()
                    #加入两个字典用extend
                    request.breadcrumb.extend(
                        [{
                            "title" :ppermission.title,
                            "url" :ppermission.url,
                        } ,{
                            "title": item["title"],
                            "url": request.path
                        }  ,# 子权限字典
                        ]

                    )
                else:
                    request.breadcrumb.append(
                        {
                            "title" :item["title"],
                            "url" :item["url"]
                        }
                    )
                return None

            <ol class="breadcrumb no-radius no-margin" style="border-bottom: 1px solid #ddd;">
                {% for item in request.breadcrumb %}
                    <li><a href="{{ item.url }}">{{ item.title }}</a></li>
                {% endfor %}
            </ol>