在嵌入式表单集中使用Django FileField [英] Using a Django FileField in an inline formset
问题描述
在将文件上传到我的应用程序时遇到问题.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，如果我将其保留为空白，它将可以使用，但是当我尝试上传文件然后提交表单时，出现500错误.基本报告已创建，但是内联的附件未保存.
having issues getting the file to upload in my app. A User submits a report and can add attachments (through a foreign key relationship). I've got the inline form showing up and will work if I leave it blank, but when I try to upload a file then submit the form I get a 500 error. The base report is made, but the attachment that's getting inlined doesn't get saved.
forms.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
relevant 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
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形式的回溯处理，我在表单中包括了enc-type，并且在views.py文件中传递了request.FILES .我的文件上传格式正常，但事实证明内联很麻烦.
Having a hard time figuring this one out since it doesn't give me any sort of traceback to deal with, I included the enc-type in the form, and I'm passing request.FILES in the views.py file. I've got file uploads working in normal forms, but inline is proving to be trouble.
如果您需要我澄清任何内容，请告诉我，谢谢您的帮助:)
Let me know if you need me to clarify anything, any help is appreciated :)
更新:通过使用@method_decorator(csrf_exempt, name='dispatch')
这给了我一个ValueError:禁止save()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，而问题出在这里:
which gives me a ValueError: save() prohibited to prevent data loss due to unsaved related object 'report'. From the trace I can see that my file is in fact making it into memory, and the issue is here:
随着我的前进，它将继续更新，似乎这种保存FK对象的方法在1.8之前可以正常工作，因此，如果幸运的话，这是一种使对象正确保存的快速解决方案.
Will continue updating as I progress, seems like this method of saving FK objects worked flawlessly pre-1.8 so if I'm lucky it's a quick fix to get the object to save right.
推荐答案
我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，既简单又方便.因此，在我的CreateView的post方法中，我将report_attachment_form的声明更改为report_attachment_form = ReportAttachmentFormSet(self.request.POST, self.request.FILES, instance=form.instance)，我们就像黄金一样.
All I needed to do was pass the instance of the Report Form I was working with along to the formset, nice and easy. So in my CreateView's post method, I changed the declaration of report_attachment_form to report_attachment_form = ReportAttachmentFormSet(self.request.POST, self.request.FILES, instance=form.instance) and we're good as gold.
这篇关于在嵌入式表单集中使用Django FileField的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
