django - 在内联表单集中使用 Django FileField

Question

在我的应用程序中上传文件时遇到问题。用户提交报告并可以添加附件(通过外键关系)。我已经显示了内联表单，如果我将其留空，它会正常工作，但是当我尝试上传文件然后提交表单时，出现 500 错误。基础报告已生成，但内联的附件未保存。

表单.py

class ReportForm(forms.ModelForm):
    accidentDate = forms.DateField(widget=SelectDateWidget(
                                   empty_label=("Choose Year",
                                                 "Choose Month",
                                                 "Choose Day"),
                                   ),
                                   label=(u'Accident Date'),
                                   initial=timezone.now())
    claimNumber = forms.CharField(max_length=50,
                                  label=(u'Claim Number'),
                                  required=True)
    damageEstimate = forms.DecimalField(max_digits=6, decimal_places=2,
                                        label=(u'Damage Estimate'))


    description = forms.CharField(widget=forms.Textarea(attrs={'rows': 5,
                                                               'cols': 80}
                                                        ),
                                  label=(u'Description'),
                                  required=True)
    drivable = forms.BooleanField(label=(u'Drivable'), 
                                  required=False)
    receivedCheck = forms.CharField(max_length=30, label=(u'Who Received Check'))
    reported = forms.BooleanField(label=(u'Reported to Insurance Company'), 
                                  required=False)
    reportedDate = forms.DateField(widget=SelectDateWidget(
                                    empty_label=("Choose Year",
                                                 "Choose Month",
                                                 "Choose Day"),
                                ),
                               initial=timezone.now(),
                               label=(u'Date Reported to Insurance'))
    repairsScheduled = forms.DateField(widget=SelectDateWidget(
                                    empty_label=("Choose Year",
                                                 "Choose Month",
                                                 "Choose Day"),
                                ),
                               initial=timezone.now(),
                               label=(u'Scheduled Repair Date'))
    repairsCompleted = forms.DateField(widget=SelectDateWidget(
                                    empty_label=("Choose Year",
                                                 "Choose Month",
                                                 "Choose Day"),
                                ),
                               initial=timezone.now(),
                               label=(u'Repair Completion Date'))
    repairsPaid = forms.BooleanField(label=(u'Repairs Paid'), 
                                  required=False)
    subrogationReceived = forms.BooleanField(label=(u'Subrogation Received'), 
                                  required=False)
    subrogationDate = forms.DateField(widget=SelectDateWidget(
                                    empty_label=("Choose Year",
                                                 "Choose Month",
                                                 "Choose Day"),
                                ),
                               initial=timezone.now(),
                               label=('Subrogation Date'))

class Meta:
    model = Report
    exclude = ('driver',)


ReportAttachmentFormSet = inlineformset_factory(Report,  # parent form
                                                    ReportAttachment,  # inline-form
                                                    fields=['title', 'attachment'], # inline-form fields
                                                    # labels for the fields
                                                    labels={
                                                        'title': (u'Attachment Name'),
                                                        'attachment': (u'File'),
                                                    },
                                                    # help texts for the fields
                                                    help_texts={
                                                        'title': None,
                                                        'attachment': None,
                                                    },
                                                    # set to false because cant' delete an non-exsitant instance
                                                    can_delete=False,
                                                    # how many inline-forms are sent to the template by default
                                                    extra=1)

相关views.py CreateView

class ReportCreateView(CreateView):
    model = Report
    form_class = ReportForm
    object = None

    def get(self, request, *args, **kwargs):
        """
        Handles GET requests and instantiates blank versions of the form
        and its inline formsets.
        """
        self.object = None
        form_class = self.get_form_class()
        form = self.get_form(form_class)
        report_attachment_form = ReportAttachmentFormSet()
        return self.render_to_response(
                  self.get_context_data(form=form,
                                        report_attachment_form=report_attachment_form,
                                        )
                                     )

    def post(self, request, *args, **kwargs):
        """
        Handles POST requests, instantiating a form instance and its inline
        formsets with the passed POST variables and then checking them for
        validity.
        """
        self.object = None
        form_class = self.get_form_class()
        form = self.get_form(form_class)
        report_attachment_form = ReportAttachmentFormSet(self.request.POST, self.request.FILES)
        if form.is_valid() and report_attachment_form.is_valid():
            return self.form_valid(form, report_attachment_form)
        else:
            return self.form_invalid(form, report_attachment_form)

    def form_valid(self, form, report_attachment_form):
        """
        Called if all forms are valid. Creates Report instance along with the
        associated ReportAttachment instances then redirects to success url
        Args:
            form: Report Form
            report_attachment_form: Report attachment Form

        Returns: an HttpResponse to success url

        """
        self.object = form.save(commit=False)
        # pre-processing for Report instance here...

        self.object.driver = Profile.objects.get(user=self.request.user)
        self.object.save()

        # saving ReportAttachment Instances
        report_attachments = report_attachment_form.save(commit=False)
        for ra in report_attachments:
            #  change the ReportAttachment instance values here
            #  ra.some_field = some_value
            ra.save()

        return HttpResponseRedirect(self.get_success_url())

    def form_invalid(self, form, report_attachment_form):
        """
        Called if a form is invalid. Re-renders the context data with the
        data-filled forms and errors.

        Args:
            form: Report Form
        report_attachment_form: Report Attachment Form
        """
        return self.render_to_response(
                 self.get_context_data(form=form,
                                       report_attachment_form=report_attachment_form
                                       )
        )

report_form.html

{% block body %}
<p>
<form action="" method="post" enctype="multipart/form-data">
    {% csrf_token %}
    <fieldset>
            {{ form.non_field_errors }}
            {% for field in form %}
            <div class="row">
                <div class="col-md-3">{% bootstrap_label field.label %}</div>
                <div class="col-md-8">{% bootstrap_field field show_label=False %}</div>
            </div>
            {% endfor %}
    </fieldset>
    <fieldset>
            <legend>Attachments</legend>
            {{ report_attachment_form.management_form }}
            {{ report_attachment_form.non_form_errors }}
                            {% for form in report_attachment_form %}
                    <div class="inline {{ report_attachment_form.prefix }}">
                    {% for field in form.visible_fields %}
                            <div class="row">
                                    <div class="col-md-3">{% bootstrap_label field.label %}</div>
                                    <div class="col-md-8">{% bootstrap_field field show_label=False %}</div>
                            </div>
                    {% endfor %}
                    </div>
            {% endfor %}
    </fieldset>
    <div class="row">
            <div class="col-md-1">
                    <input type="submit" class="btn btn-groppus-primary bordered" value="Submit" />
            </div>
    </div>
    </form>
</p>
{% endblock %}

{% block scripts %}
    <script src="{% static 'formset/jquery.formset.js' %}"></script>
    <script type="text/javascript">
            $(function() {
                    $(".inline.{{ report_attachment_form.prefix }}").formset({
                            prefix: "{{ report_attachment_form.prefix }}", // The form prefix for your django formset
                            addCssClass: "btn btn-block btn-primary bordered inline-form-add", // CSS class applied to the add link
                            deleteCssClass: "btn btn-block btn-primary bordered", // CSS class applied to the delete link
                            addText: 'Add another attachment', // Text for the add link
                            deleteText: 'Remove attachment above', // Text for the delete link
                            formCssClass: 'inline-form' // CSS class applied to each form in a formset
                    })
            });
    </script>
{% endblock %}

很难弄清楚这个问题，因为它没有给我任何类型的回溯来处理，我在表单中包含了 enc-type，并在 views.py 文件中传递了 request.FILES .我的文件上传工作正常，但事实证明内联很麻烦。

如果您需要我澄清任何事情，请告诉我，感谢您的帮助:)

更新:通过使用 @method_decorator(csrf_exempt, name='dispatch')

使 CreateView csrf 免除获得回溯

这给了我一个 ValueError: save() prohibited 以防止由于未保存的相关对象“报告”而导致数据丢失。从跟踪中我可以看到我的文件实际上正在进入内存，问题在这里:

将随着我的进步继续更新，似乎这种保存 FK 对象的方法在 1.8 之前完美无缺，所以如果我幸运的话，这是一个快速修复以正确保存对象的方法。

Answer 1

我需要做的就是将我正在使用的报告表单的实例传递给表单集，既简单又好用。所以在我的 CreateView 的 post 方法中，我将 report_attachment_form 的声明更改为.