day9 动态菜单之路径导航

修改权限初始化代码

rbac/service/init_Permission.py

# -*- encoding: utf-8 -*-
"""
@File    : init_Permission.py
@Time    : 2021-12-16 22:30
@Author  : tangsai
@Email   : 294168604@qq.com
@Software: PyCharm
"""
from django.conf import settings


def init_Permission(current_user, request):
    """
    用户权限的初始化
    :param current_user: 当前用户对象
    :param request: 请求相关所有数据
    :return:
    """
    # 2. 权限信息初始化
    # 根据当前用户信息获取此用户所拥有的所有权限，并放入session。
    # 当前用户所有权限
    permission_queryset = current_user.roles.filter(permissions__isnull=False).values("permissions__id",
                                                                                      "permissions__title",
                                                                                      "permissions__url",
                                                                                      "permissions__pid_id",
                                                                                      "permissions__pid__title",
                                                                                      "permissions__pid__url",
                                                                                      "permissions__menu_id",
                                                                                      "permissions__menu__title",
                                                                                      "permissions__menu__icon"
                                                                                      ).distinct()

    # 3. 获取权限+菜单信息
    permission_list = []

    menu_dict = {}

    for item in permission_queryset:

        permission_list.append(
            {'id': item['permissions__id'],
             'title': item['permissions__title'],
             'url': item['permissions__url'],
             'pid': item['permissions__pid_id'],
             'p_title': item['permissions__pid__title'],
             'p_url': item['permissions__pid__url'],

             })

        menu_id = item['permissions__menu_id']
        if not menu_id:
            continue
        node = {'id': item['permissions__id'], 'title': item['permissions__title'], 'url': item['permissions__url']}

        if menu_id in menu_dict:
            menu_dict[menu_id]['children'].append(node)
        else:
            menu_dict[menu_id] = {
                'title': item['permissions__menu__title'],
                'icon': item['permissions__menu__icon'],
                'children': [node, ]
            }

    request.session[settings.PERMISSION_SESSION_KEY] = permission_list
    request.session[settings.MENU_SESSION_KEY] = menu_dict

中间件代码修改

rbac/middlewares/rbac.py

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import re
from django.utils.deprecation import MiddlewareMixin
from django.shortcuts import HttpResponse
from django.conf import settings


class RbacMiddleware(MiddlewareMixin):
    """
    用户权限信息校验
    """

    def process_request(self, request):
        """
        当用户请求刚进入时候出发执行
        :param request:
        :return:
        """

        """
        1. 获取当前用户请求的URL
        2. 获取当前用户在session中保存的权限列表 ['/customer/list/','/customer/list/(?P<cid>\\d+)/']
        3. 权限信息匹配
        """
        current_url = request.path_info
        for valid_url in settings.VALID_URL_LIST:
            if re.match(valid_url, current_url):
                # 白名单中的URL无需权限验证即可访问
                return None

        permission_list = request.session.get(settings.PERMISSION_SESSION_KEY)
        if not permission_list:
            return HttpResponse('未获取到用户权限信息，请登录！')

        flag = False

        url_record = [
            {'title': '首页', 'url': '#'}
        ]

        for item in permission_list:
            reg = "^%s$" % item['url']
            if re.match(reg, current_url):
                flag = True
                request.current_selected_permission = item['pid'] or item['id']
                if not item['pid']:
                    url_record.extend([{'title': item['title'], 'url': item['url'], 'class': 'active'}])
                else:
                    url_record.extend([
                        {'title': item['p_title'], 'url': item['p_url']},
                        {'title': item['title'], 'url': item['url'], 'class': 'active'},
                    ])
                request.breadcrumb = url_record
                print(request.breadcrumb)
                break

        if not flag:
            return HttpResponse('无权访问')

模板中导航条制作成inclusion_tag


rbac/templates/rbac/breadcrumb.html

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

rbac/templatetags/rbac.py修改代码

#!/usr/bin/env python
# -*- coding:utf-8 -*-
from django.template import Library
from django.conf import settings
from collections import OrderedDict
import re

register = Library()


@register.inclusion_tag('rbac/static_menu.html')
def static_menu(request):
    """
    创建一级菜单
    :return:
    """
    menu_list = request.session[settings.MENU_SESSION_KEY]
    return {'menu_list': menu_list}


@register.inclusion_tag('rbac/multi_menu.html')
def multi_menu(request):
    """
    创建二级菜单
    :return:
    """
    menu_dict = request.session[settings.MENU_SESSION_KEY]

    # 对字典的key进行排序
    key_list = sorted(menu_dict)

    # 空的有序字典
    ordered_dict = OrderedDict()

    for key in key_list:
        val = menu_dict[key]
        val['class'] = 'hide'

        for per in val['children']:
            if per['id'] == request.current_selected_permission:
                per['class'] = 'active'
                val['class'] = ''
        ordered_dict[key] = val

    return {'menu_dict': ordered_dict}


@register.inclusion_tag('rbac/breadcrumb.html')
def breadcrumb(request):
    return {'record_list': request.breadcrumb}

完成后效果