Question

我对django有点新鲜。我在上传时选择将文件发送到另一台服务器，但form.is_valid()始终返回false会让我输入if

views.py -

def sent(request):
    if request.method == 'POST':
        form = SendFileForm(request.POST, request.FILES)
        print "form is made"
        print form.errors
        if form.is_valid():
            print "form is valid"
            new_song = Song(songfile= request.FILES['songfile'])
            new_song.save()
            print "new song is made and saved"
            l = List()
            #cd = form.cleaned_data                                                                                                                   
            #SENDS THE FILE TO SERVER GIVEN PATH
            l.all_files(new_song.songfile.path)
            return HttpResponseRedirect(reverse('get_files.views.sent'))
        else:
            print "form is not valid"
    else:
        form = SendFileForm()

    songs = Song.objects.all()
    return render_to_response('sent.html', {'songs': songs,'form': form}, context_instance=RequestContext(request))

sent.html模板 -

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

<form action={% url "sent" %} method="post" enctype="multipart/form-data">
  {% csrf_token %}
    <p>{{ form.non_field_errors }}</p>
        <p>{{ form.songfile.label_tag }} {{ form.songfile.help_text }}</p>
        <p>
            <!--{{ form.songfile.errors }}-->
            {{ form.songfile }}
        </p>
        <p><input type="submit" value="Upload" /></p>
</form>

forms.py -

class SendFileForm(forms.Form):
    path = forms.CharField()
    songfile = forms.FileField(label='Select a music file',help_text='max. 4 megabytes')

我搜索过许多论坛但无法解决问题。提前谢谢！

Answer 1

默认情况下，表单中的每个字段都是必需的（required=True）。未在必填字段中提供信息的表格无效。您可以在模板中将path字段添加到表单中，并且必须填写该字段，或者您可以创建不需要的路径：

class SendFileForm(forms.Form):
    path = forms.CharField(required=False)
    ...

或

<form action={% url "sent" %} method="post" enctype="multipart/form-data">
...
            {{ form.songfile }}
            {{ form.path }}
...
</form>

Answer 2

问题是模板中没有path输入。您的request.POST包含不完整的数据，这就是您的表单无效的原因。

模板中缺少这个：

{{ form.path }}

Answer 3

注意：-此答案仅用于帮助您调试代码。

您可以直接在视图中打印表单错误。

class YourFormView(generic.edit.CreateView):

  def post(self, request, *args, **kwargs):
    form = YourForm(request.POST)
    for field in form:
        print("Field Error:", field.name,  field.errors)

form.is_valid（）返回false（django）

3 个答案: