我正在做一个多步骤表单,所有内容都在最后保存。在我的模型中,我有一个 m2m 复选框字段,并且我使用 django Sessions 来获取表单数据以在最后一步中显示它。
问题是当我提交最终表单时,m2m 字段(复选框)未保存。
这是我的 View 文件:
views.py
def step1(request):
initial={'name': request.session.get('name', None), 'checkbox': request.session.get('checkbox', (False,))} #cookies
form = FormOneForm(request.POST or None, initial=initial)
if request.method == 'POST':
if form.is_valid():
request.session['name'] = form.cleaned_data['name']
request.session['checkbox'] = form.cleaned_data.get('checkbox')
return HttpResponseRedirect(reverse('step2'))
return render(request, 'step1.html', {'form': form})
def step2(request):
form = FormTwoForm(request.POST or None)
if request.method == 'POST':
if form.is_valid():
formtwo = form.save(commit=False)
formone2 = FormOne.objects.create(checkbox=request.session.get('checkbox')) #error is here
formone = FormOne.objects.create(name=request.session['name'])
formtwo.owner = formone
formtwo.save()
formone2.save_m2m()
return HttpResponseRedirect(reverse('step3'))
return render(request, 'step2.html', {'form': form})
models.py
class Font(models.Model):
font_name = models.CharField(max_length=100)
font_family = models.CharField(max_length=100)
font_link = models.CharField(max_length=100)
...
class FormOne(models.Model):
name = models.CharField(max_length=40)
checkbox = models.ManyToManyField(Font, blank=True)
...
class FormTwo(models.Model):
owner = models.ForeignKey(FormOne)
name = models.CharField(max_length=40)
...
这段代码给了我这个错误:
'checkbox' is an invalid keyword argument for this function
我怎样才能实现我想要实现的目标?
最佳答案
首先尝试保存对象:
formone2 = FormOne.objects.create(name=request.session['name'])
formone2.checkbox.add(request.session.get('checkbox')
问题是您需要在使用多对多关系之前保存对象。请参阅docs :
You can’t associate it with a Publication until it’s been saved
关于python - 如何将 m2m 现场 session 从一个表单保存到另一个表单?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41293674/