小黑迈出了应用开发第一步,通过武沛奇老师b站django入门课程了解了django,准备学习前端基础:django入门沛奇老师课程笔记

2024-01-08 11:38:27

课程来源:

https://www.bilibili.com/video/BV1NL41157ph/?p=71&spm_id_from=333.880.my_history.page.click

课程链接与学习资料推荐

django入门课程

https://www.bilibili.com/video/BV1NL41157ph/?p=71&spm_id_from=333.880.my_history.page.click

django入门项目开发

任务管理平台:https://www.bilibili.com/video/BV1uA411b77M

django进阶项目(增删改查、权限)

https://space.bilibili.com/283478842/channel/detail?cid=91596&ctype=0

前后端分离的项目: django + drf框架 + vue.js

https://www.bilibili.com/video/BV1ZE411j7RK

前端基础

https://www.bilibili.com/video/BV1QE411j7bV?spm_id_from=333.999.0.0

项目部署

新建django项目

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创建app

python manage.py startapp app01

注册app

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数据库配置

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DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'gx_day16',  # 数据库名字
        'USER': 'root',
        'PASSWORD': 'root123',
        'HOST': '127.0.0.1',  # 那台机器安装了MySQL
        'PORT': 3306,
    }
}

等价于建表语句:

create database gx_day16 DEFAULT CHARSET utf8 COLLATE utf8_general_ci;

数据库表格创建

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from django.db import models


class Department(models.Model):
    """ 部门表 """
    title = models.CharField(verbose_name='标题', max_length=32)


class UserInfo(models.Model):
    """ 员工表 """
    name = models.CharField(verbose_name="姓名", max_length=16)
    password = models.CharField(verbose_name="密码", max_length=64)
    age = models.IntegerField(verbose_name="年龄")
    account = models.DecimalField(verbose_name="账户余额", max_digits=10, decimal_places=2, default=0)
    create_time = models.DateTimeField(verbose_name="入职时间")

    # 无约束
    # depart_id = models.BigIntegerField(verbose_name="部门ID")
    # 1.有约束
    #   - to,与那张表关联
    #   - to_field,表中的那一列关联
    # 2.django自动
    #   - 写的depart
    #   - 生成数据列 depart_id
    # 3.部门表被删除
    # ### 3.1 级联删除
    depart = models.ForeignKey(to="Department", to_field="id", on_delete=models.CASCADE)
    # ### 3.2 置空
    # depart = models.ForeignKey(to="Department", to_field="id", null=True, blank=True, on_delete=models.SET_NULL)

    # 在django中做的约束
    gender_choices = (
        (1, "男"),
        (2, "女"),
    )
    gender = models.SmallIntegerField(verbose_name="性别", choices=gender_choices)

django为数据库自动建表

python manage.py makemigrations
python manage.py migrate

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建表成功
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静态文件管理

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django实例

模板继承

定义模版:layout.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="{% static 'plugin...min.css' %}">
    {% block css %}{% endblock %}
</head>
<body>
    <h1>标题</h1>
    <div>
        {% block content %}{% endblock %}
    </div>
    <h1>底部</h1>
    
    <script src="{% static 'js/jquery-3.6.0.min.js' %}"></script>
    {% block js %}{% endblock %}
</body>
</html>

继承模版:

{% extends 'layout.html' %}

{% block css %}
	<link rel="stylesheet" href="{% static 'pluxxx.css' %}">
	<style>
		...
	</style>
{% endblock %}


{% block content %}
    <h1>首页</h1>
{% endblock %}


{% block js %}
	<script src="{% static 'js/jqxxxin.js' %}"></script>
{% endblock %}

Form表单

views.py

class MyForm(Form):
    user = forms.CharField(widget=forms.Input)
    pwd = form.CharFiled(widget=forms.Input)
    email = form.CharFiled(widget=forms.Input)
    account = form.CharFiled(widget=forms.Input)
    create_time = form.CharFiled(widget=forms.Input)
    depart = form.CharFiled(widget=forms.Input)
    gender = form.CharFiled(widget=forms.Input)


def user_add(request):
    if request.method == "GET":
        form = MyForm()
        return render(request, 'user_add.html',{"form":form})

user_add.html(用户添加业务html文件)
普通写法:

<form method="post">
    {% for field in form%}
    	{{ field }}
    {% endfor %}
    <!-- <input type="text"  placeholder="姓名" name="user" /> -->
</form>

简便写法:

<form method="post">
    {{ form.user }}
    {{ form.pwd }}
    {{ form.email }}
    <!-- <input type="text"  placeholder="姓名" name="user" /> -->
</form>

ModelForm表单

models.py

class UserInfo(models.Model):
    """ 员工表 """
    name = models.CharField(verbose_name="姓名", max_length=16)
    password = models.CharField(verbose_name="密码", max_length=64)
    age = models.IntegerField(verbose_name="年龄")
    account = models.DecimalField(verbose_name="账户余额", max_digits=10, decimal_places=2, default=0)
    create_time = models.DateTimeField(verbose_name="入职时间")
    depart = models.ForeignKey(to="Department", to_field="id", on_delete=models.CASCADE)
    gender_choices = (
        (1, "男"),
        (2, "女"),
    )
    gender = models.SmallIntegerField(verbose_name="性别", choices=gender_choices)

views.py

class MyForm(ModelForm):
    xx = form.CharField*("...")
    class Meta:
        model = UserInfo
        fields = ["name","password","age","xx"]


def user_add(request):
    if request.method == "GET":
        form = MyForm()
        return render(request, 'user_add.html',{"form":form})

user_add.html
一般写法

<form method="post">
    {% for field in form%}
    	{{ field }}
    {% endfor %}
    <!-- <input type="text"  placeholder="姓名" name="user" /> -->
</form>

简便写法

<form method="post">
    {{ form.user }}
    {{ form.pwd }}
    {{ form.email }}
    <!-- <input type="text"  placeholder="姓名" name="user" /> -->
</form>

数据库筛选

# [obj,obj,obj]
queryset = models.PrettyNum.objects.filter(mobile="1888888888")

obj = models.PrettyNum.objects.filter(mobile="1888888888").first()

# True/False
exists = models.PrettyNum.objects.filter(mobile="1888888888").exists()

#排除自己以外,其他的数据是否手机号是否重复?

# id!=2 and mobile='1888888888'
models.PrettyNum.objects.filter(mobile="1888888888").exclude(id=2)
models.PrettyNum.objects.filter(mobile="19999999991",id=12)

data_dict = {"mobile":"19999999991","id":123}
models.PrettyNum.objects.filter(**data_dict)
models.PrettyNum.objects.filter(id=12)       # 等于12
models.PrettyNum.objects.filter(id__gt=12)   # 大于12
models.PrettyNum.objects.filter(id__gte=12)  # 大于等于12
models.PrettyNum.objects.filter(id__lt=12)   # 小于12
models.PrettyNum.objects.filter(id__lte=12)  # 小于等于12

data_dict = {"id__lte":12}
models.PrettyNum.objects.filter(**data_dict)
models.PrettyNum.objects.filter(mobile="999")               # 等于
models.PrettyNum.objects.filter(mobile__startswith="1999")  # 筛选出以1999开头
models.PrettyNum.objects.filter(mobile__endswith="999")     # 筛选出以999结尾
models.PrettyNum.objects.filter(mobile__contains="999")     # 筛选出包含999

data_dict = {"mobile__contains":"999"}
models.PrettyNum.objects.filter(**data_dict)

分页操作

分页逻辑

queryset = models.PrettyNum.objects.all()

queryset = models.PrettyNum.objects.filter(id=1)[0:10]


# 第1页
queryset = models.PrettyNum.objects.all()[0:10]

# 第2页
queryset = models.PrettyNum.objects.all()[10:20]

# 第3页
queryset = models.PrettyNum.objects.all()[20:30]

bootstrap分页封装

from django.utils.safestring import mark_safe
class Pagination(object):

    def __init__(self, request, queryset, page_size=10, page_param="page", plus=5):
        """
        :param request: 请求的对象
        :param queryset: 符合条件的数据(根据这个数据给他进行分页处理)
        :param page_size: 每页显示多少条数据
        :param page_param: 在URL中传递的获取分页的参数,例如:/etty/list/?page=12
        :param plus: 显示当前页的 前或后几页(页码)
        """

        from django.http.request import QueryDict
        import copy
        query_dict = copy.deepcopy(request.GET)
        query_dict._mutable = True
        self.query_dict = query_dict

        self.page_param = page_param
        page = request.GET.get(page_param, "1")

        if page.isdecimal():
            page = int(page)
        else:
            page = 1

        self.page = page
        self.page_size = page_size

        self.start = (page - 1) * page_size
        self.end = page * page_size

        self.page_queryset = queryset[self.start:self.end]

        total_count = queryset.count()
        total_page_count, div = divmod(total_count, page_size)
        if div:
            total_page_count += 1
        self.total_page_count = total_page_count
        self.plus = plus

    def html(self):
        # 计算出,显示当前页的前5页、后5页
        if self.total_page_count <= 2 * self.plus + 1:
            # 数据库中的数据比较少,都没有达到11页。
            start_page = 1
            end_page = self.total_page_count
        else:
            # 数据库中的数据比较多 > 11页。

            # 当前页<5时(小极值)
            if self.page <= self.plus:
                start_page = 1
                end_page = 2 * self.plus + 1
            else:
                # 当前页 > 5
                # 当前页+5 > 总页面
                if (self.page + self.plus) > self.total_page_count:
                    start_page = self.total_page_count - 2 * self.plus
                    end_page = self.total_page_count
                else:
                    start_page = self.page - self.plus
                    end_page = self.page + self.plus

        # 页码
        page_str_list = []

        self.query_dict.setlist(self.page_param, [1])
        page_str_list.append('<li><a href="?{}">首页</a></li>'.format(self.query_dict.urlencode()))

        # 上一页
        if self.page > 1:
            self.query_dict.setlist(self.page_param, [self.page - 1])
            prev = '<li><a href="?{}">上一页</a></li>'.format(self.query_dict.urlencode())
        else:
            self.query_dict.setlist(self.page_param, [1])
            prev = '<li><a href="?{}">上一页</a></li>'.format(self.query_dict.urlencode())
        page_str_list.append(prev)

        # 页面
        for i in range(start_page, end_page + 1):
            self.query_dict.setlist(self.page_param, [i])
            if i == self.page:
                ele = '<li class="active"><a href="?{}">{}</a></li>'.format(self.query_dict.urlencode(), i)
            else:
                ele = '<li><a href="?{}">{}</a></li>'.format(self.query_dict.urlencode(), i)
            page_str_list.append(ele)

        # 下一页
        if self.page < self.total_page_count:
            self.query_dict.setlist(self.page_param, [self.page + 1])
            prev = '<li><a href="?{}">下一页</a></li>'.format(self.query_dict.urlencode())
        else:
            self.query_dict.setlist(self.page_param, [self.total_page_count])
            prev = '<li><a href="?{}">下一页</a></li>'.format(self.query_dict.urlencode())
        page_str_list.append(prev)

        # 尾页
        self.query_dict.setlist(self.page_param, [self.total_page_count])
        page_str_list.append('<li><a href="?{}">尾页</a></li>'.format(self.query_dict.urlencode()))

        search_string = """
            <li>
                <form style="float: left;margin-left: -1px" method="get">
                    <input name="page"
                           style="position: relative;float:left;display: inline-block;width: 80px;border-radius: 0;"
                           type="text" class="form-control" placeholder="页码">
                    <button style="border-radius: 0" class="btn btn-default" type="submit">跳转</button>
                </form>
            </li>
            """

        page_str_list.append(search_string)
        page_string = mark_safe("".join(page_str_list))
        return page_string

分页组件使用

视图函数页面:

# 自定义的分页组件,以后如果想要使用这个分页组件,你需要做如下几件事:

# 在视图函数中:
    def pretty_list(request):

        # 1.根据自己的情况去筛选自己的数据
        queryset = models.PrettyNum.objects.all()

        # 2.实例化分页对象
        page_object = Pagination(request, queryset)

        context = {
            "queryset": page_object.page_queryset,  # 分完页的数据
            "page_string": page_object.html()       # 生成页码
        }
        return render(request, 'pretty_list.html', context)

HTML页面:

    {% for obj in queryset %}
        {{obj.xx}}
    {% endfor %}

    <ul class="pagination">
        {{ page_string }}
    </ul>

时间插件

<link rel="stylesheet" href="static/plugins/bootstrap-3.4.1/css/bootstrap.css">
<link rel="stylesheet" href="static/plugins/bootstrap-datepicker/css/bootstrap-datepicker.css">


<input type="text" id="dt" class="form-control" placeholder="入职日期">



<script src="static/js/jquery-3.6.0.min.js"></script>
<script src="static/plugins/bootstrap-3.4.1/js/bootstrap.js"></script>
<script src="static/plugins/bootstrap-datepicker/js/bootstrap-datepicker.js"></script>
<script src="static/plugins/bootstrap-datepicker/locales/bootstrap-datepicker.zh-CN.min.js"></script>


<script>
    $(function () {
        $('#dt').datepicker({
            format: 'yyyy-mm-dd',
            startDate: '0',
            language: "zh-CN",
            autoclose: true
        });

    })
</script>

ModelForm和BootStrap

form中之间添加属性

class UserModelForm(forms.ModelForm):
    class Meta:
        model = models.UserInfo
        fields = ["name", "password",]
        widgets = {
            "name": forms.TextInput(attrs={"class": "form-control"}),
            "password": forms.PasswordInput(attrs={"class": "form-control"}),
            "age": forms.TextInput(attrs={"class": "form-control"}),
        }
class UserModelForm(forms.ModelForm):
    name = forms.CharField(
        min_length=3,
        label="用户名",
        widget=forms.TextInput(attrs={"class": "form-control"})
    )

    class Meta:
        model = models.UserInfo
        fields = ["name", "password", "age"]
{{form.name}}      BootStrap的input框
{{form.password}}  BootStrap的input框

重新定义init方法批量设置

class UserModelForm(forms.ModelForm):
    class Meta:
        model = models.UserInfo
        fields = ["name", "password", "age",]

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        
        # 循环ModelForm中的所有字段,给每个字段的插件设置
        for name, field in self.fields.items():
			field.widget.attrs = {
                "class": "form-control", 
                "placeholder": field.label
            }
class UserModelForm(forms.ModelForm):
    class Meta:
        model = models.UserInfo
        fields = ["name", "password", "age",]

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        
        # 循环ModelForm中的所有字段,给每个字段的插件设置
        for name, field in self.fields.items():
            # 字段中有属性,保留原来的属性,没有属性,才增加。
            if field.widget.attrs:
				field.widget.attrs["class"] = "form-control"
				field.widget.attrs["placeholder"] = field.label
            else:
                field.widget.attrs = {
                    "class": "form-control", 
                    "placeholder": field.label
                }

自定义类,然后继承

class BootStrapModelForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # 循环ModelForm中的所有字段,给每个字段的插件设置
        for name, field in self.fields.items():
            # 字段中有属性,保留原来的属性,没有属性,才增加。
            if field.widget.attrs:
				field.widget.attrs["class"] = "form-control"
				field.widget.attrs["placeholder"] = field.label
            else:
                field.widget.attrs = {
                    "class": "form-control", 
                    "placeholder": field.label
                }

bootstrap样式继承实例

class UserEditModelForm(BootStrapModelForm):
    class Meta:
        model = models.UserInfo
        fields = ["name", "password", "age",]
class BootStrap:
    bootstrap_exclude_fields = []

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # 循环ModelForm中的所有字段,给每个字段的插件设置
        for name, field in self.fields.items():
            if name in self.bootstrap_exclude_fields:
                continue
            # 字段中有属性,保留原来的属性,没有属性,才增加。
            if field.widget.attrs:
                field.widget.attrs["class"] = "form-control"
                field.widget.attrs["placeholder"] = field.label
            else:
                field.widget.attrs = {
                    "class": "form-control",
                    "placeholder": field.label
                }


class BootStrapModelForm(BootStrap, forms.ModelForm):
    pass


class BootStrapForm(BootStrap, forms.Form):
    pass

中间件

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定义中间件类

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

class M1(MiddlewareMixin):
    """ 中间件1 """

    def process_request(self, request):

        # 如果方法中没有返回值(返回None),继续向后走
        # 如果有返回值 HttpResponse、render 、redirect
        print("M1.process_request")
        return HttpResponse("无权访问")

    def process_response(self, request, response):
        print("M1.process_response")
        return response


class M2(MiddlewareMixin):
    """ 中间件2 """

    def process_request(self, request):
        print("M2.process_request")

    def process_response(self, request, response):
        print("M2.process_response")
        return response

应用中间件 setings.py

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'app01.middleware.auth.M1',
    'app01.middleware.auth.M2',
]

中间件实现校验登录

编写中间件

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


class AuthMiddleware(MiddlewareMixin):

    def process_request(self, request):
        # 0.排除那些不需要登录就能访问的页面
        #   request.path_info 获取当前用户请求的URL /login/
        if request.path_info == "/login/":
            return

        # 1.读取当前访问的用户的session信息,如果能读到,说明已登陆过,就可以继续向后走。
        info_dict = request.session.get("info")
        print(info_dict)
        if info_dict:
            return

        # 2.没有登录过,重新回到登录页面
        return redirect('/login/')

应用中间件

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'app01.middleware.auth.AuthMiddleware',
]

登录与注销

cookie和session

# cookie,本质上保存在浏览器端的键值对。 
# session,保存服务器端(django是将session默认存储在数据库中)

def order_add(request):
    request.session['xx'] = 123
    
def logout(request):
	request.session.clear()

登录

def index(request):
    info = request.session.get("info")
    if not info:
        return redirect('/login/')
    
    ...

注销

def logout(request):
    """ 注销 """

    request.session.clear()

    return redirect('/login/')

生成数字图片验证码

pip install pillow
import random
from PIL import Image, ImageDraw, ImageFont, ImageFilter


def check_code(width=120, height=30, char_length=5, font_file='Monaco.ttf', font_size=28):
    code = []
    img = Image.new(mode='RGB', size=(width, height), color=(255, 255, 255))
    draw = ImageDraw.Draw(img, mode='RGB')

    def rndChar():
        """
        生成随机字母
        :return:
        """
        return chr(random.randint(65, 90))

    def rndColor():
        """
        生成随机颜色
        :return:
        """
        return (random.randint(0, 255), random.randint(10, 255), random.randint(64, 255))

    # 写文字
    font = ImageFont.truetype(font_file, font_size)
    for i in range(char_length):
        char = rndChar()
        code.append(char)
        h = random.randint(0, 4)
        draw.text([i * width / char_length, h], char, font=font, fill=rndColor())

    # 写干扰点
    for i in range(40):
        draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())

    # 写干扰圆圈
    for i in range(40):
        draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())
        x = random.randint(0, width)
        y = random.randint(0, height)
        draw.arc((x, y, x + 4, y + 4), 0, 90, fill=rndColor())

    # 画干扰线
    for i in range(5):
        x1 = random.randint(0, width)
        y1 = random.randint(0, height)
        x2 = random.randint(0, width)
        y2 = random.randint(0, height)

        draw.line((x1, y1, x2, y2), fill=rndColor())

    img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)
    return img, ''.join(code)


if __name__ == '__main__':
    img, code_str = check_code()
    print(code_str)

    with open('code.png', 'wb') as f:
        img.save(f, format='png')

ajax请求

$.ajax({
    url:"发送的地址",
    type:"get",
    data:{
        n1:123,
        n2:456
    },
    success:function(res){
        console.log(res);
    }
})

GET请求

$.ajax({
    url: '/task/ajax/',
    type: "get",
    data: {
        n1: 123,
        n2: 456
    },
    success: function (res) {
        console.log(res);
    }
})
from django.shortcuts import render, HttpResponse

def task_ajax(request):
    print(request.GET)
    return HttpResponse("成功了")

POST请求

$.ajax({
    url: '/task/ajax/',
    type: "get",
    data: {
        n1: 123,
        n2: 456
    },
    success: function (res) {
        console.log(res);
    }
})
from django.shortcuts import render, HttpResponse
from django.views.decorators.csrf import csrf_exempt


@csrf_exempt
def task_ajax(request):
    print(request.GET)
    print(request.POST)
    return HttpResponse("成功了")

绑定事件

{% extends 'layout.html' %}


{% block content %}
    <div class="container">
        <h1>任务管理</h1>

        <h3>示例1</h3>
        <input id="btn1" type="button" class="btn btn-primary" value="点击"/>

    </div>
{% endblock %}

{% block js %}
    <script type="text/javascript">
        $(function () {
            // 页面框架加载完成之后代码自动执行
            bindBtn1Event();

        })

        function bindBtn1Event() {
            $("#btn1").click(function () {
                $.ajax({
                    url: '/task/ajax/',
                    type: "post",
                    data: {
                        n1: 123,
                        n2: 456
                    },
                    success: function (res) {
                        console.log(res);
                    }
                })
            })
        }

    </script>
{% endblock %}

ajax请求返回值接受

{% extends 'layout.html' %}


{% block content %}
    <div class="container">
        <h1>任务管理</h1>

        <h3>示例1</h3>
        <input id="btn1" type="button" class="btn btn-primary" value="点击"/>

    </div>
{% endblock %}

{% block js %}
    <script type="text/javascript">
        $(function () {
            // 页面框架加载完成之后代码自动执行
            bindBtn1Event();

        })

        function bindBtn1Event() {
            $("#btn1").click(function () {
                $.ajax({
                    url: '/task/ajax/',
                    type: "post",
                    data: {
                        n1: 123,
                        n2: 456
                    },
                    dataType: "JSON",
                    success: function (res) {
                        console.log(res);
                        console.log(res.status);
                        console.log(res.data);
                    }
                })
            })
        }

    </script>
{% endblock %}
import json
from django.shortcuts import render, HttpResponse
from django.http import JsonResponse
from django.views.decorators.csrf import csrf_exempt


def task_list(request):
    """ 任务列表 """
    return render(request, "task_list.html")


@csrf_exempt
def task_ajax(request):
    print(request.GET)
    print(request.POST)

    data_dict = {"status": True, 'data': [11, 22, 33, 44]}
    return HttpResponse(json.dumps(data_dict))

jquery修改标签内容

- 本质上:找到标签;操作标签。

- 找标签
	$("#x1")
	$(".x1")
	$("div")
	
	$("input[type='text']")   找到 input 标签且 type='text'
- 操作标签
	$("#x1").text()            <div id='x1'>dd</div>
	$("#x1").text("xxx")       <div id='x1'>xxx</div>
	
	$("#x1").val()             <input id='x1' />
	$("#x1").val("xxx")        <input id='x1' />
	
	$("#x1").attr("uu")           <div id='x1' uu="123">dd</div>
	$("#x1").attr("uu","999")     <div id='x1' uu="999">dd</div>
	
	$("#x1").empty()          <div id='x1'>dd</div>  - 清空内容
	$("#x1").remove()         <div id='x1'>dd</div>  - 整个标签删除

文件上传

基本操作

<form method="post" enctype="multipart/form-data">
    {% csrf_token %}
    <input type="text" name="username">
    <input type="file" name="avatar">
    <input type="submit" value="提交">
</form>
from django.shortcuts import render, HttpResponse


def upload_list(request):
    if request.method == "GET":
        return render(request, 'upload_list.html')

    # # 'username': ['big666']
    # print(request.POST)  # 请求体中数据
    # # {'avatar': [<InMemoryUploadedFile: 图片 1.png (image/png)>]}>
    # print(request.FILES)  # 请求发过来的文件 {}

    file_object = request.FILES.get("avatar")
    # print(file_object.name)  # 文件名:WX20211117-222041@2x.png

    f = open(file_object.name, mode='wb')
    for chunk in file_object.chunks():
        f.write(chunk)
    f.close()
    return HttpResponse("...")

批量上传文件至数据库案例

{% extends 'layout.html' %}


{% block content %}

    <div class="container">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"> {{ title }} </h3>
            </div>
            <div class="panel-body">
                <form method="post" enctype="multipart/form-data" novalidate >
                    {% csrf_token %}

                    {% for field in form %}
                        <div class="form-group">
                            <label>{{ field.label }}</label>
                            {{ field }}
                            <span style="color: red;">{{ field.errors.0 }}</span>
                        </div>
                    {% endfor %}

                    <button type="submit" class="btn btn-primary">提 交</button>
                </form>
            </div>
        </div>
    </div>

{% endblock %}

from django import forms
from app01.utils.bootstrap import BootStrapForm


class UpForm(BootStrapForm):
    bootstrap_exclude_fields = ['img']

    name = forms.CharField(label="姓名")
    age = forms.IntegerField(label="年龄")
    img = forms.FileField(label="头像")


def upload_form(request):
    title = "Form上传"
    if request.method == "GET":
        form = UpForm()
        return render(request, 'upload_form.html', {"form": form, "title": title})

    form = UpForm(data=request.POST, files=request.FILES)
    if form.is_valid():
        # {'name': '武沛齐', 'age': 123, 'img': <InMemoryUploadedFile: 图片 1.png (image/png)>}
        # 1.读取图片内容,写入到文件夹中并获取文件的路径。
        image_object = form.cleaned_data.get("img")

        # file_path = "app01/static/img/{}".format(image_object.name)
        db_file_path = os.path.join("static", "img", image_object.name)

        file_path = os.path.join("app01", db_file_path)
        f = open(file_path, mode='wb')
        for chunk in image_object.chunks():
            f.write(chunk)
        f.close()

        # 2.将图片文件路径写入到数据库
        models.Boss.objects.create(
            name=form.cleaned_data['name'],
            age=form.cleaned_data['age'],
            img=db_file_path,
        )
        return HttpResponse("...")
    return render(request, 'upload_form.html', {"form": form, "title": title})

启用media

urls.py操作

from django.urls import path, re_path
from django.views.static import serve
from django.conf import settings

urlpatterns = [
	re_path(r'^media/(?P<path>.*)$', serve, {'document_root': settings.MEDIA_ROOT}, name='media'),
]

settings.py

import os

MEDIA_ROOT = os.path.join(BASE_DIR, "media")
MEDIA_URL = "/media/"

在这里插入图片描述

混合数据保存数据库案例

models.py

class City(models.Model):
    """ 城市 """
    name = models.CharField(verbose_name="名称", max_length=32)
    count = models.IntegerField(verbose_name="人口")

    # 本质上数据库也是CharField,自动保存数据。
    img = models.FileField(verbose_name="Logo", max_length=128, upload_to='city/')

ModelForm

from app01.utils.bootstrap import BootStrapModelForm


class UpModelForm(BootStrapModelForm):
    bootstrap_exclude_fields = ['img']

    class Meta:
        model = models.City
        fields = "__all__"

视图函数

def upload_modal_form(request):
    """ 上传文件和数据(modelForm)"""
    title = "ModelForm上传文件"
    if request.method == "GET":
        form = UpModelForm()
        return render(request, 'upload_form.html', {"form": form, 'title': title})

    form = UpModelForm(data=request.POST, files=request.FILES)
    if form.is_valid():
        # 对于文件:自动保存;
        # 字段 + 上传路径写入到数据库
        form.save()
        
        return HttpResponse("成功")
    return render(request, 'upload_form.html', {"form": form, 'title': title})

在这里插入图片描述

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文章来源:https://blog.csdn.net/qq_37418807/article/details/135448806
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