Django之一级菜单

from django.db import models            
class Permission(models.Model):
    url = models.CharField(max_length=64, verbose_name=‘权限‘)
    title = models.CharField(max_length=32, verbose_name=‘标题‘)  # 备注这个url是做什么的
    icon = models.CharField(max_length=64, null=True, verbose_name=‘图标‘) # 存放菜单前面的图标
    is_menu = models.BooleanField(default=False) # 用来判断（此url）是否是菜单
            
    def __str__(self):
        return self.title
            
    class Meta:
        verbose_name_plural = ‘权限管理‘
            
            
class Role(models.Model):
    name = models.CharField(max_length=32, verbose_name=‘角色‘)
    permissions = models.ManyToManyField(Permission, verbose_name=‘角色拥有的权限‘, blank=True)
            
    def __str__(self):
        return self.name
            
    class Meta:
        verbose_name_plural = ‘角色管理‘
            
            
class User(models.Model):
    username = models.CharField(max_length=32, verbose_name=‘用户名‘,unique=True)
    password = models.CharField(max_length=32, verbose_name=‘密码‘)
    roles = models.ManyToManyField(Role, verbose_name=‘用户的角色‘, blank=True)
            
    def __str__(self):
        return self.username
            
    class Meta:
        verbose_name_plural = ‘用户管理‘

per = obj.roles.all().filter(permissions__url__isnull=False).values(‘permissions__url‘,
                                                                    ‘permissions__title‘,
                                                                    ‘permissions__icon‘,
                                                                    ‘permissions__is_menu‘,
                                                                    ).distinct()
print(per)

## 打印per的数据
QuerySet[{
             ‘permissions__url‘: ‘/customer/list/‘,
             ‘permissions__title‘: ‘客户列表‘,
             ‘permissions__icon‘: ‘fa-connectdevelop‘,
             ‘permissions__is_menu‘: True},
         {
             ‘permissions__url‘: ‘/customer/add/‘,
             ‘permissions__title‘: ‘添加客户‘,
             ‘permissions__icon‘: None,
             ‘permissions__is_menu‘: False},
         {
             ‘permissions__url‘: ‘/customer/edit/(?P<cid>\\d+)/‘,
             ‘permissions__title‘: ‘编辑客户‘,
             ‘permissions__icon‘: None,
             ‘permissions__is_menu‘: False},
         {
             ‘permissions__url‘: ‘/customer/del/(?P<cid>\\d+)/‘,
             ‘permissions__title‘: ‘删除客户‘,
             ‘permissions__icon‘: None,
             ‘permissions__is_menu‘: False},
         {
             ‘permissions__url‘: ‘/payment/list/‘,
             ‘permissions__title‘: ‘账单列表‘,
             ‘permissions__icon‘: ‘fa-code-fork‘,
             ‘permissions__is_menu‘: True},
         {
             ‘permissions__url‘: ‘/payment/add/‘,
             ‘permissions__title‘: ‘添加账单‘,
             ‘permissions__icon‘: None,
             ‘permissions__is_menu‘: False},
         {
             ‘permissions__url‘: ‘/payment/edit/(?P<pid>\\d+)/‘,
             ‘permissions__title‘: ‘编辑账单‘,
             ‘permissions__icon‘: None,
             ‘permissions__is_menu‘: False},
         {
             ‘permissions__url‘: ‘/payment/del/(?P<pid>\\d+)/‘,
             ‘permissions__title‘: ‘删除账单‘,
             ‘permissions__icon‘: None,
             ‘permissions__is_menu‘: False
         }]

# 菜单列表
            menu = []
    
            # 权限列表
            permission = []
    
            for i in per:
                permission.append({
                    ‘url‘: i.get(‘permissions__url‘)
                })
                if i.get(‘permissions__is_menu‘): # 如果permissions__is_menu为True就是菜单，放到菜单列表中
                    menu.append({
                        ‘url‘: i.get(‘permissions__url‘),
                        ‘title‘: i.get(‘permissions__title‘),
                        ‘icon‘: i.get(‘permissions__icon‘)
                    })

# 存放权限的session的key
PERMISSION_SESSION_KEY = ‘permission‘

# 存放菜单的session的key
MENU_SESSION_KEY = ‘menu‘

from django.conf import settings
request.session[settings.PERMISSION_SESSION_KEY] = permission
request.session[settings.MENU_SESSION_KEY] = menu

permission = request.session.get(settings.PERMISSION_SESSION_KEY)
# 权限验证(url,中间件中获取的当前url地址如：通过request.path_info获取)
for i in permission:
    if re.match(r‘^{}$‘.format(i[‘url‘]), url):
    return

# -*- coding: utf-8 -*-
# __author__ = "maple"
            
from django import template
from django.conf import settings
import re
register = template.Library()
@register.inclusion_tag(‘menu_tag.html‘) # 讲给这个模板进行渲染
def menu(request):
    url = request.path_info  # 获取当前url地址
    menu_list = request.session[settings.MENU_SESSION_KEY]  # 获取session中的菜单url地址

    # 添加激活的样式
    for i in menu_list:
        if re.match(f‘^{i["url"]}$‘,url): # 判断，如果当前页面地址栏中的url地址是菜单中的地址
            i[‘class‘] = ‘active‘         # 就给菜单中的地址加上active类选择器。
            break    
            return {‘menu_list‘:menu_list}          
            
    #此时，menu_list列表中的数据为：（前端页面当前停留在客户列表菜单上）
    [{
    ‘url‘: ‘/customer/list/‘,
    ‘title‘: ‘客户列表‘,
    ‘icon‘: ‘fa-connectdevelop‘,
    ‘class‘: ‘active‘},
    {
    ‘url‘: ‘/payment/list/‘,
    ‘title‘: ‘账单列表‘,
    ‘icon‘: ‘fa-code-fork‘
    }]

<div class="static-menu">
{% for menu in menu_list %}
<a href="{{ menu.url}}" class="{{menu.class}}">
<span class="icon-wrap"><i class="fa {{menu.icon}}"></i></span> {{ menu.title}}</a>
{% endfor %}
</div>

<div class="left-menu">
<div class="menu-body">
{% load my_tags %} # my_tags为存放menu函数的文件名，
{% menu request %} # request为第七步中的menu函数的参数
</div>
</div>