from django import forms#所有的表单类都应该是forms.Form的子类class ContactForm(forms.Form):    subject = forms.CharField(max_length=100)    message = forms.CharField()    sender = forms.EmailField()    cc_myself = forms.BooleanField(required=False)

from django.forms import ModelForm# Create the form class.class ArticleForm(ModelForm):    class Meta:        model = Article

from django.shortcuts import renderfrom django.http import HttpResponseRedirectdef contact(request):    if request.method == ‘POST‘: # If the form has been submitted...        form = ContactForm(request.POST) # A form bound to the POST data        if form.is_valid(): # All validation rules pass            # Process the data in form.cleaned_data            subject = form.cleaned_data[‘subject‘]#使用cleaned_data而不是request.POST，因为前者前者不仅已经通过验证并且都是所有的内容都已经转成了符合python标准的类型            message = form.cleaned_data[‘message‘]            sender = form.cleaned_data[‘sender‘]            cc_myself = form.cleaned_data[‘cc_myself‘]            recipients = [‘info@example.com‘]            if cc_myself:                recipients.append(sender)            from django.core.mail import send_mail            send_mail(subject, message, sender, recipients)            return HttpResponseRedirect(‘/thanks/‘) # Redirect after POST    return HttpResponseRedirect(‘/thanks/‘) # Redirect after POST else: form = ContactForm() # An unbound form return render(request, ‘contact.html‘, { ‘form‘: form, })

<form action="/contact/" method="post">{% csrf_token %}<!-- djnago 强制使用跨站点请求伪造保护（Cross Site Request Forgery protection）-->{{ form.as_p }}<input type="submit" value="Submit" /></form>

<p><label for="id_subject">Subject:</label>    <input id="id_subject" type="text" name="subject" maxlength="100" /></p><p><label for="id_message">Message:</label>    <input type="text" name="message" id="id_message" /></p><p><label for="id_sender">Sender:</label>    <input type="text" name="sender" id="id_sender" /></p><p><label for="id_cc_myself">Cc myself:</label>    <input type="checkbox" name="cc_myself" id="id_cc_myself" /></p>

<form action="/contact/" method="post">    {{ form.non_field_errors }}    <div class="fieldWrapper">        {{ form.subject.errors }}        <label for="id_subject">Email subject:</label>        {{ form.subject }}    </div>    <div class="fieldWrapper">        {{ form.message.errors }}        <label for="id_message">Your message:</label>        {{ form.message }}    </div>    <div class="fieldWrapper">        {{ form.sender.errors }}        <label for="id_sender">Your email address:</label>        {{ form.sender }}    </div>    <div class="fieldWrapper">        {{ form.cc_myself.errors }}        <label for="id_cc_myself">CC yourself?</label>        {{ form.cc_myself }}    </div>    <p><input type="submit" value="Send message" /></p></form>

<form action="/contact/" method="post">    {% for field in form %}        <div class="fieldWrapper">            {{ field.errors }}            {{ field.label_tag }}: {{ field }}        </div>    {% endfor %}    <p><input type="submit" value="Send message" /></p></form>

{{ field.label }}The label of the field, e.g. Email address.{{ field.label_tag }}The field’s label wrapped in the appropriate HTML <label> tag, e.g. <label for="id_email">Email address</label>{{ field.value }}The value of the field. e.g someone@example.com{{ field.html_name }}The name of the field that will be used in the input element’s name field. This takes the form prefix into account, if it has been set.{{ field.help_text }}Any help text that has been associated with the field.{{ field.errors }}Outputs a <ul class="errorlist"> containing any validation errors corresponding to this field. You can customize the presentation of the errors with a {% for error in field.errors %} loop. In this case, each object in the loop is a simple string containing the error message.field.is_hiddenThis attribute is True if the form field is a hidden field and False otherwise. It’s not particularly useful as a template variable, but could be useful in conditional tests such as:{% if field.is_hidden %}   {# Do something special #}{% endif %}