django: form fileupload - 1

本节介绍 Form 中一些字段类型的使用，以文件上传字段 FileField 为例：（注，其它字段和相关用法见官方文档中的 Forms -> Built-in Fields）

一，配置 urls.py：

from django.conf.urls import patterns, include, url

# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'csvt03.views.home', name='home'),
    # url(r'^csvt03/', include('csvt03.foo.urls')),

    # Uncomment the admin/doc line below to enable admin documentation:
    # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),

    # Uncomment the next line to enable the admin:
    url(r'^admin/', include(admin.site.urls)),
    url(r'^index/$','blog.views.index'),
    url(r'^blog/show_author/$', 'blog.views.show_author'),
    url(r'blog/register/$', 'blog.views.register'),  # Django Form
    url(r'blog/regist/$', 'blog.views.regist'),      # 在前面例子的基础上增加 127.0.0.1:8000/blog/regist/ 地址作测试
)

二，编写 blog.views.regist 处理函数（blog/views.py）：

from django.shortcuts import render_to_response as r2r
from blog.models import Employee, Author, Book

def index(req):
    emps = Employee.objects.all()
    return r2r('index.html', {'emps':emps})

def show_author(req):
    authors = Author.objects.all()
    return r2r('show_author.html', {'authors':authors})

from django import forms
from django.http import HttpResponse

class UserForm(forms.Form):
    name = forms.CharField()
#   username = forms.CharField()
    headImg = forms.FileField()

def register(req):
    if req.method == 'POST':
        form = UserForm(req.POST)   # Binding
        if form.is_valid():
            print form.cleaned_data
            return HttpResponse('ok')
    else:
        form = UserForm()
    return r2r('register.html', {'form':form})

def regist(req):
    if req.method == 'POST':
        uf = UserForm(req.POST, req.FILES)    # 绑定
        if uf.is_valid():
            print uf.cleaned_data['name']
            upfile = uf.cleaned_data['headImg']
            print upfile.name, upfile.size
            fp = file('upload/'+upfile.name, 'wb')
            fp.write(upfile.read())
            fp.close()
            return HttpResponse('OK')
    else:
        uf = UserForm()
    return r2r('regist.html', {'uf':uf})

三，编写模板文件 blog/templates/regist.html：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Django DB</title>
    </head>
    <body>
        <div>User Regist</div>
        <div>
        <form method='post' enctype="multipart/form-data">
            {{uf.as_p}}
            <input type='submit' value='ok' />
        </form>
        </div>
    </body>
</html>