Python3.4 + Django1.7.7 搭建简单的表单并提交

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Python3.4 + Django1.7.7 搭建简单的表单并提交

season雅宁 2015-04-17 17:33:00 浏览717
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后面还有一个问题,是我把txt生成了,但是网页没有返回我还不知道,现在怎么直接返回txt并且展示出来txt 的内容,希望大牛不吝赐教


首先有一个问题

django1.7之前,这样用:


HttpResponse(simplejson.dumps({“status”: ‘200’, “message”:u’登录成功’}), mimetype=’application/json’)


没问题,但是django1,7之后就报错了,查了下问题发现应该这样用:


HttpResponse(simplejson.dumps({“status”: ‘200’, “message”:u’登录成功’}), content_type=’application/json’)


html模版:

<html>
<style type="text/css">
    {# <ul class="errorlist">。。。</ul> #}
    {# ul标签下的class="errorlist"的属性进行渲染 #}{# 标签下的属性 #}
    ul.errorlist {
        margin: 0;
        padding: 0;
    }
    {# <ul class="errorlist"><li>单词个数低于4个!</li></ul> #}
    {# errorlist class下的 li标签内的元素进行渲染 #}{# 属性下一级的标签 #}
    .errorlist li {
        background-color: red;
        color: white;
        display: block;
        font-size: 10px;
        margin: 0 0 3px;
        padding: 4px 5px;
    }
    .field{
        background-color:#BCD8F5;
    }
</style>
<head>
    <title>Contact us</title>
</head>
<body>

    {% if form.errors %}
        <p style="color: red;">
            Please correct the error{{ form.errors|pluralize }} below.
        </p>
    {% endif %}

    <form action="" method="post">
        <div class="field">
		This is a brief description of Interim Fix :
            {# 自动生成的默认错误信息显示 #}
            {# 会被翻译成:<ul class="errorlist"><li>这个字段是必填项。</li></ul> #}
            {{ form.subject.errors }}
            <label for="id_subject">12</label>
            {{ form.subject }}
            {# 自定义的错误信息显示 #}
            {% if form.subject.errors%}
            <label for="id_self_def_error_info" style="color: red;">
                *自定义错误信息:主题不能为空
            </label>
            {% endif %}

        </div>
        <div class="field">
            {{ form.email.errors }}
            <label for="id_email"> for IBM SPSS Data Collection DDL 7 ("Software").</label>
            {{ form.email }}
        </div>
        <div class="field">
            {{ form.message.errors }}
            <label for="id_message">页面中自定义的信息:</label>
            {{ form.message }}
        </div>
        <input type="submit" value="提交">
    </form>
</body>
</html>



form.py

#coding: gb2312
from django import forms

class ContactForm(forms.Form):
    subject = forms.CharField(max_length=10,label='subject')#设置最大长度为10
    email = forms.EmailField(required=False,label='Email')#非必要字段
    message = forms.CharField(widget=forms.Textarea,label='message')#指定form中组件的类型

    #自定义校验规则,该方法在校验时被系统自动调用,次序在“字段约束”之后
    def clean_message(self):
        message = self.cleaned_data['message']#能到此处说明数据符合“字段约束”要求
        num_words = len(message.split())
        if num_words < 0:#单词个数
            raise forms.ValidationError("your word is too short!")
        return message



views.py


#coding: gb2312
from django.http import HttpResponse
import datetime,calendar
import time
from django.http import HttpResponse
from django.template import Context
from django.template.loader import get_template
from django.http import HttpResponse, Http404
from django.contrib.auth.models import User
from django.shortcuts import render_to_response
from django.http import HttpResponseRedirect
from django.contrib.auth import logout
from django.template import RequestContext
#from django import form

from django.shortcuts import render 
from .forms import ContactForm 
#from django.shortcuts import render_to_response
#from django_manage_app.forms import ContactForm

def current_datetime(request):
    now = time.strftime('%Y-%m-%d-%H-%M-%S',time.localtime(time.time()))
    html = '<html><body>It is now %s.</body></html>' %now
    return HttpResponse(html)
    
def contact_author(request):
    if request.method == 'POST':#提交请求时才会访问这一段,首次访问页面时不会执行
        form = ContactForm(request.POST)
        if form.is_valid():#说明各个字段的输入值都符合要求
            cd = form.cleaned_data#只有各个字段都符合要求时才有对应的cleaned_data
            #print (form.cleaned_data())
            print (cd['subject'])
            print (cd['email'])
            print (cd['message'])
            return HttpResponseRedirect('/thanks/')
        else:#有部分字段不符合要求,会有error相关信息给加到form中去,需要覆盖掉
            #print (form)
            print ('The data does not meet the requirements')
            print (form['subject'].errors)
            print (form['email'].errors)
            print (form['message'].errors)
    else:#首次访问该url时没有post任何表单
        form = ContactForm()#第一次生成的form里面内容的格式
        print (form)
        print (form.is_valid())

    #“首次访问”和“提交的信息不符合要求”时被调用
    return render_to_response('contact_author.html', {'form': form})


def thanks(request):

    return render_to_response('thanks.html')
    
    
def download_file(request):   
    #from django.http import HttpResponse          
    ## CSV  
    #import csv      
    #response = HttpResponse(mimetype='text/csv')  
    #response['Content-Disposition'] = 'attachment; filename=my.csv'  
    #writer = csv.writer(response)  
    #writer.writerow(['First row', 'Foo', 'Bar', 'Baz'])  
    #writer.writerow(['Second row', 'A', 'B', 'C', '"Testing"', "Here's a quote"])  
 
    # Text file  #要是返回txt放开这部分代码 return response
    #response = HttpResponse(content_type="text/plain")                                   
    #response['Content-Disposition'] = 'attachment; filename=my.txt'                
    #response.write("aa/n")  
    #response.write("bb")   
     
    # PDF file   
    #http://code.djangoproject.com/svn/django/branches/0.95-bugfixes/docs/outputting_pdf.txt  
    #from reportlab.pdfgen import canvas  #need pip install reportlab
    #response = HttpResponse()#)mimetype='application/pdf')  
    #response['Content-Disposition'] = 'attachment; filename=somefilename.pdf'  
    #p = canvas.Canvas(response)  
    #p.drawString(100, 100, "Hello world.")  
    #p.showPage()  
    #p.save()  
    #response = HttpResponse()
    fout=open("mysite//test.txt","wt") 
    str = "hello world"
    fout.write(str)
    fout.close()     
    #response['Content-Disposition'] = 'attachment; filename=test.txt' 
    data = open("mysite//test.txt", "rb").read()

    html = '<html><body>%s</body></html>' %str
    return HttpResponse(data, content_type="text/plain")
    

 参考文献:


http://blog.chedushi.com/archives/7538






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