以下学习 朔宁夫 开发课（Python）。

文件上传&表单类

一 Django文件上传

表单上传。

前端：表单设置 

enctype = "multipart/form-data"

后端：获取上传文件对象

upload_dile = request.FILES.get("文件域名称")

后端：分块写入服务器

for chunk in upload_file.chunks():

        目标文件.write(chunk)

演示：

python manage.py startapp upload_app

setting // installed_apps

total urls // path('upload_app/', include('upload_app.urls', namespace='upload')),

sub urls // 

app_name = "upload"urlpatterns = [path("upload/", upload_view, name="up"),]

template //

<form action="{% url 'upload:up' %}" method="post" enctype="multipart/form-data">{% csrf_token %}Upload file: <br><input type="file" name="a_file"><br><input type="submit" value="UPLOAD">
</form>

views //

def upload_view(request):#BASE_DIR = 'D:/webDevelopment/exercises/djangoProject'if request.method == "GET":return render(request, "upload.html")if request.method == "POST":upload_obj = request.FILES.get("a_file")file_name = str(int(time.time()) * 1000) + upload_obj.name#path = os.path.join(BASE_DIR, "/upload_files", upload_obj.name)  # , file_namepath = os.path.join('D:/webDevelopment/exercises/djangoProject/upload_files', file_name)print(path)with open(path, 'wb') as f:for chunk in upload_obj.chunks():f.write(chunk)print('flag_up_w')data = {"msg": "Data Uploaded."}return JsonResponse(data)

# 上传同名文件会覆盖。加入时间戳可。

admin 上传：

class Anime(models.Model):name = models.CharField(max_length=32, verbose_name='figure name')impress = models.FloatField(verbose_name="index")#  img = models.FilePathField()img = models.ImageField(verbose_name="img")class Meta:verbose_name = "figure"verbose_name_plural = verbose_namedef __str__(self):return self.name

#注册

models = [Anime,
]admin.site.register(models)setting //
MEDIA_ROOT = os.path.join(BASE_DIR, "upload_files")
MEDIA_URL = '/media/'

二 表单类

简化编码。使用步骤：继承→自定义类属性→调用→模板渲染。

app下form.py //

from django import formsclass RegisterForm(forms.Form):reg_name = forms.CharField(max_length=10, label="user_name")reg_pwd = forms.CharField(max_length=20, label="pwd", widget=forms.PasswordInput())  # 组件reg_home = forms.ChoiceField(label="area", choices=((1, 'alive'), (2, 'dead'), (3, 'walk_dead')))gender = forms.ChoiceField(label='gender', choices=((1, 'Female'), (2, 'Male')), widget=forms.RadioSelect())

views //

def form_view(request):if request.method == "GET":form = RegisterForm()return render(request, "form.html", locals())if request.method == "POST":form = RegisterForm(request.POST)if form.is_valid():name = form.cleaned_data["reg_name"]home = form.cleaned_data["reg_home"]gender = form.cleaned_data["gender"]data = {"name": name,"home": home,"gender": gender,}return JsonResponse(data)else:return JsonResponse({"msg": "Fail"})

template //

<form action="{% url 'upload:reg' %}" method="post">{% csrf_token %}{{ form.as_p }}<input type="submit" value="register">
</form>