我有1種形式的2個模型。在這種形式下數據可以改變。 對於1模型(Sloep_core),內容只需要更新,這是行得通的。 其他模型(Sloep_gegevens)的內容通常會更新。 只有在模型'Sloep_gegevens'的形式中更改'sloepnaam'值時,模型'Sloep_gegevens'的記錄必須輸入新記錄,而不更新舊記錄。 save()必須從update更改爲insert,但是如何?Django多模式表單,在一個模型上保存或更新
我試圖把soms代碼放在一起(用一些搜索操作)。我來到下面的代碼,但現在它總是插入代碼。有人有一個想法讓它正確嗎?
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,})
[檢索已保存的實例時ORM調用init是否可能重複?](http://stackoverflow.com/questions/37175724/does-the-orm-call-init-when-retrieving-a-saved-實例) – e4c5
我看不到它在這個鏈接的重複位置。 – Jeebeevee