2rbac组件后台布局模板，权限粒度控制，权限按钮

Posted 2021-01-02 venicid

tags:

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1、后台布局管理

https://www.cnblogs.com/venicid/p/7772742.html#_label0

1、通用模板

 overflow: auto;       //在a和b模板中进行切换

a 模板 ：左侧菜单跟随滚动条
 b模板  左侧以及上不动 ****

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>


    <style type="text/css">
        .header {
            width: 100%;
            height: 60px;
            background-color: #369;
        }

        .right {
            float: right;
        }

        .left {
            float: left;
        }

        .menu {
            position: absolute;
            top: 60px;
            left: 0;
            bottom: 0;
            background-color: gainsboro;
            width: 20%;
        }

        .content {
            position: absolute;
            top: 60px;
            right: 0;
            bottom: 0;
            background-color: mediumpurple;
            width: 80%;

            overflow: auto;       //在a和b模板中进行切换
        }

    </style>
</head>
<body>


<div class="header"></div>

<div class="container">
    <div class="menu left">
        1111
    </div>

    <div class="content right">222
        {% block content %}

        {% endblock %}
    </div>

</div>

</body>
</html>

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2、模板继承

users.html / roles.html 继承自 base.html

users.html

{% extends ‘base.html‘ %}

{% block con %}
<h4>用户列表</h4>
    {% for user in user_list %}
    <p>{{ user }}</p>
    {% endfor %}
    
{% endblock con%}

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2、权限按钮控制：简单控制

用户权限不同，按钮显示就不同！

登录成功后，就已经注册了session
    request.session[‘permission_list‘] = permission_list    

permission_list = request.session.get(‘permission_list‘)

    简单控制：
        {% if "users/add" in permissions_list%}

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3、修改表结构

BUT: 不好，不想让 if "/users/add/" 写死，会有 "/roles/add/" 情况，不健壮！怎么办？      不应该根据表名，去判断！！

权限不同，按钮显示就不同 如何做呢？    
上面问题的解决办法：

　　为了扩展，
　　# 把两条线 合成一个线
    　　/users/..
　　    /roles/...

1、admin显示字段

注意：list_display = []

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2、添加action,group字段

注意点：
    加了一个权限组表，
    将每张表的增删改查，划到一个组里面！
    无论多复杂的，最终一定是对数据库的（增删改查） 
    
    修改表结构，重新处理中间件，登录页面：
    目的：全是为了按钮的粒度，同一个模板，同一个视图，
          显示不同的数据，权限

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from django.db import models


# Create your models here.

class User(models.Model):
    name = models.CharField(max_length=32)
    pwd = models.CharField(max_length=32)
    roles = models.ManyToManyField(to=‘Role‘)

    def __str__(self):
        return self.name


class Role(models.Model):
    title = models.CharField(max_length=32)
    permissions = models.ManyToManyField(to="Permission")

    def __str__(self):
        return self.title


class Permission(models.Model):
    title = models.CharField(max_length=32)
    url = models.CharField(max_length=32)
    action = models.CharField(max_length=32, default="")

    group = models.ForeignKey(to="PermissionGroup", on_delete=True)
    def __str__(self):
        return self.title


class PermissionGroup(models.Model):
     title = models.CharField(max_length=32 )
     def __str__(self):
         return self.title

View Code

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4、重构数据结构

1、登录验证

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2、构建permission_dict

3.登录之后，重写 initial_session(user,request)
就是：
    # 在session中注册权限列表   用户权限
    # request.session[‘permission_list‘] = permission_list
        
    不应该是list 而是dict
        
    # 在session中注册权限字典  
    request.session[‘permission_dict‘] = permission_dict

　注意点：

permission = user.roles.all().values(‘permission__url‘, ‘permission__group_id‘, ‘permission__action‘).distinct()

　　对数据的处理，以组为键

{1: {‘urls‘: [‘/users/‘, ‘/users/add/‘, ‘/users/delete/(\\d+)/‘, ‘/users/edit/(\\d+)/‘], 
     ‘actions‘: [‘list‘, ‘add‘, ‘delete‘, ‘edit‘]}, 
 2: {‘urls‘: [‘/roles/‘], 
     ‘actions‘: [‘list‘]}}

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# -*- coding: utf-8 -*-
# @Time    : 2018/08/11 0011 9:24
# @Author  : Venicid


def initial_session(request,user):
    # 方案2
    permissions = user.roles.all().values("permissions__url", "permissions__group_id","permissions__action").distinct()
    print(permissions)
    # <QuerySet [{‘permissions__url‘: ‘/users/‘,
                # ‘permissions__group_id‘: 1,
                # ‘permissions__action‘: ‘list‘}]>

    permission_dict = {}
    for item in permissions:
        gid = item.get("permissions__group_id")
        if not gid in permission_dict:
            permission_dict[gid] = {
                "urls":[item["permissions__url"],],
                "actions":[item["permissions__action"],]
            }
        else:
            permission_dict[gid]["urls"].append(item["permissions__url"])
            permission_dict[gid]["actions"].append(item["permissions__action"])

    print(permission_dict)  # {1: {‘urls‘: [‘/users/‘], ‘actions‘: [‘list‘]}}
    request.session["permission_dict"] = permission_dict


    # 方案1：
    """
    permissions = user.roles.all().values("permissions__url").distinct()

    permission_list = []
    for item in permissions:
        permission_list.append(item[‘permissions__url‘])

    print(permission_list)  # [‘/users/‘, ‘/users/add‘, ‘/users/delete/(\\d+)‘, ‘/users/edit/(\\d+)‘]

    request.session["permission_list"] = permission_list
    """

    """
    values :

    for role in user.roles.all():   # <QuerySet [<Role: 保洁>, <Role: 销售>]>
        temp.append({
        "title":role.title,
        "permissions_url":role.permissions.all()
        })

    # <QuerySet [{‘title‘: ‘保洁‘, ‘permissions__url‘: ‘/users/‘},
    # {‘title‘: ‘销售‘, ‘permissions__url‘: ‘/users/‘},
    # {‘title‘: ‘销售‘, ‘permissions__url‘: ‘/users/add‘}]>

    """

View Code

5、限制权限粒度

1、中间件校验权限：

    # 注意：妙 ！！
    request.actions = item["actions"]

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# -*- coding: utf-8 -*-
# @Time    : 2018/08/11 0011 9:04
# @Author  : Venicid

import re

from django.utils.deprecation import MiddlewareMixin
from django.shortcuts import HttpResponse, redirect


class ValidPermission(MiddlewareMixin):
    def process_request(self, request):

        # 当前访问路径
        current_path = request.path_info

        # 1、检验是否属于白名单  白名单，不需要任何权限的url
        # 正则匹配
        valid_url_list = [‘/login/‘, ‘/reg/‘, ‘/admin/.*‘]
        for valid_url in valid_url_list:
            ret = re.match(valid_url, current_path)

            if ret:
                return None

        # 2、校验是否登录
        user_id = request.session.get("user_id")
        if not user_id:
            return redirect(‘/login/‘)

        # 3、校验权限2

        permission_dict = request.session.get("permission_dict", {})
        # {1: {‘urls‘: [‘/users/‘], ‘actions‘: [‘list‘]}}

        for item in permission_dict.values():
            urls = item["urls"]
            for reg in urls:
                reg = "^%s$" % reg
                ret = re.match(reg, current_path)
                if ret:
                    print("actions",item["actions"])
                    request.actions = item["actions"]
                    return None
        return HttpResponse("没有访问权限")

        # 3、校验权限1
        """
        permission_list = request.session.get("permission_list",[])
        print(permission_list)

        flag = False
        for permission in permission_list:
            permission = "^%s$" % permission
            # print(111111111,permission)
            # print(current_path)
            ret = re.match(permission, current_path)
            if ret:
                flag = True
                break

        if not flag:
            return HttpResponse("没有访问权限")
        return None
        """

rbac中间件

模板层，权限按钮控制

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2：用类来实现！！

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from django.shortcuts import render, HttpResponse

# Create your views here.

from rbac.models import *
from rbac.service.perssions import *


class Per(object):
    def __init__(self, actions):
        self.actions = actions
    def add(self):
        return "add" in self.actions
    def delete(self):
        return "delete" in self.actions
    def edit(self):
        return "edit" in self.actions
    def list(self):
        return "list" in self.actions


def users(request):
    user_list = User.objects.all()
    permission_list = request.session.get("permission_list")

    # 查询当前登录人的名字
    id = request.session.get("user_id")
    user = User.objects.filter(id=id).first()
    print(user)

    per = Per(request.actions)

    return render(request, "users.html", locals())


def add_user(request):
    return HttpResponse(‘add user‘)


def delete_user(request, id):
    return HttpResponse(‘delete_user‘)


def edit_user(request, id):
    return HttpResponse(‘edit_user‘)


def roles(request):
    role_list = Role.objects.all()

    per = Per(request.actions)
    print(request.actions)
    return render(request, "roles.html", locals())


def login(request):
    if request.method == "POST":
        user = request.POST.get("user")
        pwd = request.POST.get("pwd")

        user = User.objects.filter(name=user, pwd=pwd).first()
        if user:
            ############## 在session中注册用户
            request.session[‘user_id‘] = user.pk

            ############# 在session中注册权限list
            initial_session(request, user)

            return HttpResponse("登录成功")

    return render(request, ‘login.html‘, locals())