Question

我有1种形式的2个模型。在这种形式下，数据可以更改。对于1个型号（Sloep_core），内容只需要更新，这是有效的。对于其他模型（Sloep_gegevens），内容规范将更新。只有价值＆＃39; sloepnaam＆＃39;在模型＆＃39; Sloep_gegevens＆＃39;的形式中更改了模型的记录＆＃39; Sloep_gegevens＆＃39;必须输入新记录而不更新旧记录。 save（）必须从update更改为insert，但是如何？

我试图将soms代码放在一起（使用一些搜索操作）。我来到下面的代码，但现在它总是插入代码。有人有想法让它正确吗？

model.py：

class Sloep_core(models.Model):
        FSN_nummer = models.IntegerField(unique=True)
        HT_nummer = models.IntegerField(unique=True, blank=True, null=True)
        SRNL_nummer = models.IntegerField(blank=True, null=True)
        sloep_type = models.CharField(max_length=128, blank=True)
        werf =  models.CharField(max_length=255, blank=True)
        info = models.TextField(blank=True)
        objects = SloepManager()

        def __str__(self):
                return str(self.FSN_nummer)

class Sloep_gegevens(models.Model):
        sloep = models.ForeignKey(Sloep_core, on_delete=models.CASCADE, default='')
        sloepnaam = models.CharField(max_length=128)
        thuishaven = models.CharField(max_length=128, blank=True)
        date = models.DateField(auto_now=True)
        __original_sloepnaam = None

        def __init__(self, *args, **kwargs):
                super(Sloep_gegevens, self).__init__(*args, **kwargs)
                self.__original_sloepnaam = self.sloepnaam

        def save(self, force_insert=False, force_update=False, *args, **kwargs):
                if self.sloepnaam != self.__original_sloepnaam:
                        #  then do this
                        force_insert = True
                else:
                        #  do that
                        force_update = True

                super(Sloep_gegevens, self).save(force_insert, force_update, *args, **kwargs)
                self.__original_sloepnaam = self.sloepnaam

        class Meta:
                ordering = ["date"]

        def __str__(self):
                return self.sloepnaam

form.py：

class SloepGegevensForm(forms.ModelForm):
        class Meta:
                model = Sloep_gegevens
                exclude = ['pk', 'sloep']

class SloepCoreForm(forms.ModelForm):          
        class Meta:
                model = Sloep_core
                exclude = ['pk', 'SRNL_nummer']

views.py：

def sloep_edit(request, pk):
    sloep = Sloep_core.objects.get(pk=pk)
    sloep_sg = Sloep_gegevens.objects.filter(sloep=pk).order_by('-date')[0]
    if request.method == "POST":
        formSG = SloepGegevensForm(request.POST)
        formSC = SloepCoreForm(request.POST, instance=sloep)
        if all([formSG.is_valid(), formSC.is_valid()]):
            sloep = formSC.save()
            SG = formSG.save(commit=False)
            SG.sloep = sloep
            SG.save()
            return redirect('sloep_detail', pk=sloep.pk)
    else:
        formSG = SloepGegevensForm(instance=sloep_sg)
        formSC = SloepCoreForm(instance=sloep)
    return render(
        request,
        'sloepen/sloep_edit.html',
        {'formSG': formSG, 'formSC': formSC,})

Answer 1

我找到了问题的答案。在视图中，我没有在POST request.model中给出带有SloepGegevensForm的pk。我将formSG = SloepGegevensForm(request.POST)更改为formSG = SloepGegevensForm(request.POST, instance=sloep_sg)
这使save（）工作。

Django多模型表单，在一个模型上保存或更新

1 个答案: