Django 實現圖片上傳和顯示

時間 2019-11-07

原文原文鏈接

第1章新建工程和建立app

新建工程和建立app就不用貼出來了，我這裏是測試圖片上傳的功能可否實現，因此項目都是新的，正常在以有的app下就能夠html

第2章模型層：

2.1建立數據庫

from django.dbimport models

# Create your models here.
class User(models.Model):
    name= models.CharField(max_length=50)
    # upload_to 指定上傳文件位置
    # 這裏指定存放在img/ 目錄下
    headimg = models.FileField(upload_to="img/")

    # 返回名稱
    def__str__(self):
        returnself.namepython

2.2初始化數據庫：

(mypy3) ➜ BBS python manage.py makemigrations數據庫

Migrations for 'app01':django

app01/migrations/0001_initial.pysession

- Create model Userapp

(mypy3) ➜ BBS python manage.py migrate ide

Operations to perform:post

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

第3章修改配置文件

3.1settings中增長以下配置：

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

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章數據校驗模塊：

數據須要校驗的狀況下，若是你不想校驗，這個能夠忽略

4.1在app下建立forms文件：

from django import forms

# 表單類用以生成表單
class AddForm(forms.Form):
name = forms.CharField()
headimg = forms.FileField()

第5章視圖層：

5.1編寫圖片處理邏輯

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

# Create your views here.
def add(request):
    # 判斷是否爲post 方法提交
    ifrequest.method == "POST":
        af = AddForm(request.POST, request.FILES)
        # 判斷表單值是否和法
        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章模版層：

上傳的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

<!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>