Django 内联表单集不保存默认值

Question

我有一个子 inlineformset，如果用户更改了它，它会保存，但如果保持不变，则不会保存默认值。

SeVsEff是孩子，而患者是父母

模型.py

class Patient(TimeStampedModel):
    patient_id = models.UUIDField(
        primary_key=True, unique=True, default=uuid.uuid4, editable=False
    )
    name = models.CharField("Patient Name", max_length=255)

    user = models.ForeignKey(
        settings.AUTH_USER_MODEL, null=True, on_delete=models.SET_NULL
    )

class SeVsEff(TimeStampedModel):
    value = models.IntegerField(default=20)
    patient = models.ForeignKey(Patient, on_delete=models.CASCADE)

表格.py

class PatientForm(ModelForm):
    class Meta:
        model = Patient
        fields = ["name"]

SevseffFormSet = inlineformset_factory(
    Patient,
    SeVsEff,
    fields=("value",),
    widgets={'value': RangeInput()},
    extra=0,
    min_num=1,
    validate_min=True,
    labels=None,
)

视图.py

    def post(self, *args, **kwargs):
        form = PatientForm(data=self.request.POST)
        sevseff_formset = SevseffFormSet(data=self.request.POST)

        if form.is_valid():
            patient_instance = form.save()
            patient_instance.user = self.request.user
            patient_instance.save()

            if sevseff_formset.is_valid():
                sevseff_name = sevseff_formset.save(commit=False)
                for sevseff in sevseff_name:
                    sevseff.patient = patient_instance
                    sevseff.save()

所以我认为问题在于 sevseff_formset 没有被注册为有效，除非它被改变，但如果我添加如下内容：

            if not sevseff_formset.has_changed():
                sevseff_name = sevseff_formset.save(commit=False)
                for sevseff in sevseff_name:
                    sevseff.patient = patient_instance
                    sevseff.save()

这不起作用，因为 sevseff_name 为空。

Answer 1

这样做：

sevseff_name = sevseff_formset.save(commit=False)
for sevseff in sevseff_name:
    sevseff.patient = patient_instance
    sevseff.save()
if not sevseff_name:
    SeVsEff(value=20, patient=patient_instance).save()

来自https://forum.djangoproject.com/t/django-inline-formset-not- Saving-default-values/10647/3 的解决方案