宜配屋

第1章新建工程和创建app

新建工程和创建app就不用贴出来了，我这里是测试图片上传的功能能否实现，所以项目都是新的，正常在以有的app下就可以

第2章模型层：

2.1创建数据库

from django.dbimport models

# Create your models here.
class User(models.Model):
  name= models.CharField(max_length=50)
  # upload_to 指定上传文件位置
  # 这里指定存放在img/ 目录下
  headimg = models.FileField(upload_to="img/")

  # 返回名称
  def__str__(self):
    returnself.name

2.2初始化数据库：

(mypy3) ➜ BBS python manage.py makemigrations

Migrations for 'app01':

 app01/migrations/0001_initial.py

  - Create model User

(mypy3) ➜ BBS python manage.py migrate    

Operations to perform:

 Apply all migrations: admin, app01, auth, contenttypes, sessions

第3章修改配置文件

3.1settings中增加如下配置：

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

3.2工程的urls文件：

from django.conf.urlsimport url
from django.contrib import admin
from django.urls import path, include
from django.conf.urls.static import static
from django.conf import settings

urlpatterns = [
  url(r'^admin/', admin.site.urls),
  # url(r'^regsiter/', views.regsiter),
  # url(r'', TemplateView.as_view(template_name="app01/index.html")),
  path('app01/', include('app01.urls'))
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

3.3app：

from django.urlsimport path
from . import views

app_name = 'app01'
urlpatterns = [
  path('add/', views.add, name='add'),
  # path('index/', views.index, name='index'),
]

3.4修改模版配置：

TEMPLATES= [
  {
    'BACKEND': 'django.template.backends.django.DjangoTemplates',
    'DIRS': [os.path.join(BASE_DIR, 'templates')],
    'APP_DIRS': True,
    'OPTIONS': {
      'context_processors': [
        'django.template.context_processors.debug',
        'django.template.context_processors.request',
        'django.contrib.auth.context_processors.auth',
        'django.contrib.messages.context_processors.messages',
      ],
    },
  },
]

第4章数据校验模块：

数据需要校验的情况下，如果你不想校验，这个可以忽略

4.1在app下创建forms文件：

from django import forms

# 表单类用以生成表单
class AddForm(forms.Form):
  name = forms.CharField()
  headimg = forms.FileField()

第5章视图层：

5.1编写图片处理逻辑

from django.shortcutsimport render
from .models import User
from .forms import AddForm

# Create your views here.
def add(request):
  # 判断是否为post 方法提交
  ifrequest.method == "POST":
    af = AddForm(request.POST, request.FILES)
    # 判断表单值是否和法
    ifaf.is_valid():
      name = af.cleaned_data['name']
      headimg = af.cleaned_data['headimg']
      user = User(name=name, headimg=headimg)
      user.save()
      returnrender(request, 'app01/index.html', context={"user":user})
  else:
    af = AddForm()
    returnrender(request, 'app01/add.html', context={"af":af})

第6章模版层：

上传的html

<!-- templates/users/add.html -->
<!doctype html>
<html>
<head>
  <title>Add</title>
  <meta charset="utf-8">
</head>
<body>
  <h1>Add!</h1>

  <form method="post" enctype="multipart/form-data" action="{% url'app01:add' %}">
    {%csrf_token %}
    {{ af.as_p }}
    <inputtype="submit" value="OK"/>
  </form>
</body>
</html>

查看的html

<!-- templates/users/index.html -->
<!doctype html>
<html>
<head>
  <title>Detail</title>
  <meta charset="utf-8">
</head>
<body>
  <p>{{user.name}}</p>
  <img width="50%" height="50%"src="/media/{{ user.headimg }}">
</body>
</html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持【听图阁-专注于Python设计】。