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")

models

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

中间件

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}

过滤器

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

中间件

             <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>

layout中的渲染表签