Django AttributeError: 调用 form.is_valid() 总是导致 'is_vaild' 没有这个属性

Question

我花了一整天在找解决办法，几乎把StackOverflow上的所有答案都看了一遍，但还是解决不了我的问题。所以，我只能提出这个问题。

在models.py文件里，我有：

from django.db import models
import datetime
from django.utils import timezone

class Cap(models.Model):

    title = models.CharField(max_length=50)
    user_id = models.CharField(max_length=100)
    dest_id = models.CharField(max_length=100)
    cap_id = models.CharField(max_length=500)

    text_part = models.FileField(upload_to='texts/%Y/%m/%d')

    time_to_live = models.IntegerField()
    pub_date = models.DateField()

    def __unicode__(self):
        return self.title

然后在forms.py文件里，我有：

from django.forms import ModelForm

from latercap.models import Capsule

class CapForm(ModelForm):
    class Meta:
        model = Cap
        fields = '__all__'

接着在views.py文件里，我有：

from django.shortcuts import render
from django.http import HttpResponseRedirect
from myapp.forms import CapForm

def upload(request):
    # Handle file upload
    if request.method == 'POST':
        form = CapForm(request.POST, request.FILES)
        if form.is_vaild():
            form.save()
            # Redirect to the upload page after POST
            return HttpResponseRedirect('/myapp/upload/')
    else:
        form = CapForm() # An empty, unbound form

    message = "You can upload your message here!"
    context = {'message': message, 'form': form}

    # Render upload page with the documents and the form
    return render(request, 'myapp/upload.html', context)

最后在upload.html文件里，我有：

<b>{{message}}</b>

<form action="{% url 'myapp:upload' %}" method="post" enctype="multipart/form-data">
    {% csrf_token %}
    <p>{{ form.non_field_errors }}</p>
    <p>Title: {{ form.title }}</p>
    <p>From: {{ form.user_id }}</p>
    <p>To: {{ form.dest_id }}</p>
    <p>No. {{ form.cap_id }}</p>
    <p>Open after: {{ form.time_to_live }}</p>
    <p>Publish date: {{ form.pub_date }}</p>
    <p>My message:</p>
    <p>
       {{ form.text_part }}
    </p>
    <p><input type="submit" value="Upload" /></p>
</form>

当我在表单里输入正确的值并点击“上传”按钮时，我总是会收到：

> AttributeError at /myapp/upload/ 'CapForm' object has no attribute
> 'is_vaild'
> Request Method:   POST Request
> URL:  http://127.0.0.1:8000/myapp/upload/
> Django Version:   1.6.5
> Exception Type:   AttributeError Exception Value:  'CapForm' object
> has no attribute 'is_vaild'

我尝试过：

用print form.errors，但什么也没显示
在if之前用print form.is_valid()，还是出现错误
删除text_part，只传request.POST给form，依然有错误
使用form(data=request.POST, files=request.FILES)，还是出错
用print form.is_multipart()得到的结果是True
提交空表单或填写正确的表单都出现同样的错误

我该怎么做才能让这个工作正常呢？非常感谢！

django error handling web development attributeerror models views templates form validation

Django AttributeError: 调用 form.is_valid() 总是导致 'is_vaild' 没有这个属性

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