我有一些代码正在引发MultiValueDictKeyError，我只是想了解为什么会发生这种情况。保存文件时一切正常;然而，当我尝试添加更多数据时，错误弹出。
我必须警告你，我非常喜欢django / python /编程。对此的任何帮助都将帮助我理解如何在Django中正确实例化表单。
模特（工作）：
from django.db import models
from django.utils import timezone
from django.contrib.auth.models import User
class Document(models.Model):
docfile = models.FileField(upload_to='documents/%Y/%m/%d')
def __unicode__(self):
return self.first_name
表格（工作）：
from django import forms
from django.forms import ModelForm
from .models import Document
class DocumentForm(forms.ModelForm):
docfile = forms.FileField(label='Select a file',)
class Meta:
model = Document
观点（工作）：
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from .models import NewDocument, Document
from .forms import NewDocumentForm, DocumentForm
import time
def list(request):
if request.method == 'POST':
form = DocumentForm(request.POST, request.FILES)
if form.is_valid():
# newdoc = Document(docfile = request.FILES['docfile']) #simplified version
f_docfile = request.FILES['docfile']
newdoc = Document(docfile=f_docfile)
newdoc.save()
return HttpResponseRedirect(reverse('uploadtest.views.list'))
else:
form = DocumentForm() # A empty, unbound form
return render_to_response(
'uploadtest/list.html',
{'form': form},
context_instance=RequestContext(request)
)
模板（工作）
<div class="section">
<!-- Upload form. Note enctype attribute! -->
<form action="{% url "list" %}" method="post" enctype="multipart/form-data">
{% csrf_token %}
<p>{{ form.non_field_errors }}</p>
<p>{{ form.docfile.label_tag }} {{ form.docfile.help_text }}</p>
<p>
{{ form.docfile.errors }}
{{ form.docfile }}
</p>
<p><input type="submit" value="Submit" /></p>
</form>
</div>
模特（不工作）
from django.db import models
from django.utils import timezone
from django.contrib.auth.models import User
class NewDocument(models.Model):
user = models.ForeignKey(User)
timestamp = models.DateTimeField(auto_now_add=True)
part = models.CharField(max_length=255)
description = models.CharField(max_length=255)
analysis = models.TextField()
docfile = models.FileField(upload_to='documents/%Y/%m/%d')
表格（不工作）
from django import forms
from django.forms import ModelForm
from .models import NewDocument, Document
class NewDocumentForm(forms.ModelForm):
docfile = forms.FileField(label='Select a file',)
class Meta:
model = NewDocument
观点（不工作）
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from .models import NewDocument, Document
from .forms import NewDocumentForm, DocumentForm
import time
def list(request):
if request.method == 'POST':
#import pdb
#pdb.set_trace()
form = NewDocumentForm(request.POST, request.FILES)
if form.is_valid():
f_user = request.user
f_timestamp = str(int(time.time()))
f_part = request.POST['part']
f_description = request.POST['description']
f_analysis = request.POST['analysis']
f_docfile = request.FILES['docfile']
newdoc = NewDocument(user=f_user, timestamp=f_timestamp, part=f_part, description=f_description, analysis=f_analysis, docfile=f_docfile)
newdoc.save()
return HttpResponseRedirect(reverse('uploadtest.views.list'))
else:
form = NewDocumentForm() # A empty, unbound form
return render_to_response(
'uploadtest/list.html',
{'form': form},
context_instance=RequestContext(request)
)
模板（不工作）
<div class="section">
<!-- Upload form. Note enctype attribute! -->
<form action="{% url "list" %}" method="post" enctype="multipart/form-data">
{% csrf_token %}
<li>
<p><label for="id_part">Part</label>
<input id="id_part" type="text" name="part" maxlength="255" /></p>
<p><label for="id_description">Description</label>
<input id="id_description" type="text" name="description" maxlength="255" /></p>
</li>
<p><label for="id_analysis">Analysis</label>
<input id="id_analysis" type="text" name="analysis" maxlength="" /></p>
<p>{{ form.non_field_errors }}</p>
<p>{{ form.docfile.label_tag }} {{ form.docfile.help_text }}</p>
<p>
{{ form.docfile.errors }}
{{ form.docfile }}
</p>
<p><input type="submit" value="Submit" /></p>
</form>
</div>
感谢您的帮助！
我继续乱用pdb，这就是我得到的。这有用吗？
-> try:
(Pdb)
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(293)__getitem__()
-> list_ = super(MultiValueDict, self).__getitem__(key)
(Pdb) s
KeyError: ('user',)
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(293)__getitem__()
-> list_ = super(MultiValueDict, self).__getitem__(key)
(Pdb)
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(294)__getitem__()
-> except KeyError:
(Pdb)
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(295)__getitem__()
-> raise MultiValueDictKeyError("Key %r not found in %r" % (key, self))
(Pdb)
--Call--
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(283)__repr__()
-> def __repr__(self):
(Pdb)
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(284)__repr__()
-> return "<%s: %s>" % (self.__class__.__name__,
(Pdb)
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(285)__repr__()
-> super(MultiValueDict, self).__repr__())
(Pdb)
--Return--
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(285)__repr__()->"<QueryDict: ...: [u'What']}>"
-> super(MultiValueDict, self).__repr__())
(Pdb)
MultiValueDictKeyError: MultiVal...at']}>",)
> /Users/tehspacecadet_air/newenv/lib/python2.7/site-packages/django/utils/datastructures.py(295)__getitem__()
-> raise MultiValueDictKeyError("Key %r not found in %r" % (key, self))
答案 0 :(得分：0)
这可能意味着您的request.POST中缺少其中一个字段。 您可以在将request.POST字典传递给NewDocumentForm之前记录它吗？
答案 1 :(得分：0)
引发“MultiValueDictKeyError”，因为您的request.POST中存在字段不匹配以及您在forms.py中声明的字段
例如，您的forms.py中缺少“part”，“description”，“analysis”声明
希望这可以修复错误