我一直在研究关于这个问题的每一个问题，但似乎找不到解决方案。
我正在尝试允许用户提交多个对象并使用带有 2 个外键的表单集保存到数据库。
我可以获取表单以将该数据保存到数据库中，但由于 ManagementForm 错误而无法获取要保存的表单集中的表单。问题不在于我在 HTML 中没有它。 (检查下面的 HMTL 代码。)我还为表单集设置了前缀。
我不知道是否需要创建自定义表单和表单集而不是使用模型。也许我需要更好地验证表单集中的信息。
我得到的错误是:
/home/aking/signatureProject/signatureApp/views.py in signatures
if formset.is_valid(): ...
Variable Value
DD <DDForm bound=True, valid=True, fields=(downdraft_id)>
PR <PRForm bound=True, valid=True, fields=(report_id;report_desc)>
SignatureFormSet <class 'django.forms.formsets.SigFormFormSet'>
formset <django.forms.formsets.SigFormFormSet object at 0x7f44601a4e10>
request <WSGIRequest: POST '/signatureApp/signatures/'>
views.py
/usr/lib64/python2.7/site-packages/django/forms/formsets.py in is_valid
forms_valid True
self <django.forms.formsets.SigFormFormSet object at 0x7f44601a4e10>
/usr/lib64/python2.7/site-packages/django/forms/formsets.py in errors
self.full_clean()
self <django.forms.formsets.SigFormFormSet object at 0x7f44601a4e10>
/usr/lib64/python2.7/site-packages/django/forms/formsets.py in full_clean
for i in range(0, self.total_form_count()):
empty_forms_count 0
self <django.forms.formsets.SigFormFormSet object at 0x7f44601a4e10>
/usr/lib64/python2.7/site-packages/django/forms/formsets.py in total_form_count
return min(self.management_form.cleaned_data[TOTAL_FORM_COUNT], self.absolute_max)
self <django.forms.formsets.SigFormFormSet object at 0x7f44601a4e10>
/usr/lib64/python2.7/site-packages/django/utils/functional.py in __get__
res = instance.__dict__[self.name] = self.func(instance)
cls <class 'django.forms.formsets.SigFormFormSet'>
instance <django.forms.formsets.SigFormFormSet object at 0x7f44601a4e10>
self <django.utils.functional.cached_property object at 0x1b29dd0>
/usr/lib64/python2.7/site-packages/django/forms/formsets.py in management_form
code='missing_management_form',
form <ManagementForm bound=True, valid=False, fields=(TOTAL_FORMS;INITIAL_FORMS;MIN_NUM_FORMS;MAX_NUM_FORMS)>
self <django.forms.formsets.SigFormFormSet object at 0x7f44601a4e10>
View .py
from __future__ import unicode_literals
from django.shortcuts import render
from django.http import HttpResponse
from signatureApp.forms import DDForm,PRForm,SigForm
from django.forms.formsets import formset_factory
def signatures(request):
SignatureFormSet = formset_factory(SigForm)
if request.method == "POST":
DD = DDForm(request.POST)
PR = PRForm(request.POST)
formset = SignatureFormSet(request.POST, prefix='SFS')
if DD.is_valid() and PR.is_valid():
DD.save()
PR.save(commit=False)
PR.draft_id = DD.cleaned_data['draft_id']
PR.save()
if formset.is_valid():
for form in formset:
form.save(commit=False)
form.draft_id = DD.cleaned_data['draft_id']
form.report_id = PR.cleaned_data['report_id']
sig_type = form.cleaned_data.get('sig_type')
sig_desc = form.cleaned_data.get('sig_desc')
sig_rule = form.cleaned_data.get('sig_rule')
form.save(True)
return render(request, 'reporting.html', {'DD':DDForm, 'PR':PRForm, 'SignatureFormSet':SignatureFormSet})
HTML
<form class='signatures' method='POST'>
{% csrf_token %}
{{ SignatureFormSet.management_form }}
<div id='draft'>
<h1>Enter Information from New Report Below</h1>
<p><strong>ID:</strong><br>{{ DD.draft_id }}</p>
</div>
<div id='report'>
<p><strong>Report Number:</strong><br>{{ PR.report_id }}</p>
<p><strong>Report Description:</strong><br>{{ PR.report_desc }}</p>
</div>
{% for form in SignatureFormSet %}
<div id='{{form.prefix}}' class='dynamic-form'>
<p><strong>Signature Type:</strong><br>{{ form.sig_type }}</p>
<p><strong>Signature Description:</strong><br>{{ form.sig_desc }}</p>
<p><strong>Signature Rule:</strong><br>{{ form.sig_rule }}</p>
{% endfor %}
</div>
<div class="btn-group">
<button class="addSignature">Add a signature</button>
<button id="submit-button">Submit</button>
</div>
</form>
表单.py
from django import forms
from signatureApp.models import draft_report, report, signatures
class DDForm(forms.ModelForm):
class Meta:
model = draft_report
fields = ['draft_id',]
class PRForm(forms.ModelForm):
class Meta:
model = report
exclude = ('draft_id',)
class SigForm(forms.ModelForm):
class Meta:
model = signatures
exclude = ('draft_id','report_id',)
请您参考如下方法:
您需要在 GET 分支中实例化所有表单和表单集。并且在此处实例化表单集时需要使用前缀。
def signatures(request):
SignatureFormSet = formset_factory(SigForm)
if request.method == "POST":
...
else:
DD = DDForm()
PR = PRForm()
formset = SignatureFormSet(prefix='SFS')
return render(request, 'reporting.html', {'DD': DD, 'PR': PR, 'SignatureFormSet': formset})
