Django TextField 始终是必需的，尽管空白=True，Null=True

Question

尽管我有最好的愿望，但我在一个似乎总是需要的领域遇到了麻烦。我的“word_search”文本字段总是要求输入数据，但我一直在努力确保选项允许空白。

我的模型是这个。您可以看到 blank=True,Null=True 选项

class IAV(models.Model):

  z_score = models.DecimalField(max_digits = 4,decimal_places=4)
  screens = models.IntegerField(default=0)
  flu_proteins = models.IntegerField(default = 0)
  Key_word = models.TextField(blank=True,null=True)
  sess = models.ForeignKey(Sess_IAV,default=None)

我的观点是这样的

def new_IAV(request):

  if request.method == "POST":
    form = IAVForm(request.POST,request.FILES)
    if form.is_valid():
      sess_ = Sess_IAV.objects.create()
      form.save(
          for_page=sess_,
          z_score = form.cleaned_data("z_score"),
          screens = form.cleaned_data("screens"),
          flu_proteins = form.cleaned_data("flu_proteins"),
          Key_word = form.cleaned_data("key_word"),
          )
      return redirect(sess_)
    else:
      print(form.errors)
  else:
    url=reverse('IAV_home')
    return HttpResponseRedirect(url)

我的表格是这样的。您可以看到 required=False 属性。

class IAVForm(forms.models.ModelForm):

  z_score = forms.DecimalField(widget=forms.NumberInput(attrs={'class':'form-control','value':'0.0',}))

  screens = forms.IntegerField(widget=forms.NumberInput(attrs={'class':'form-control','value':'0',}))

  flu_proteins = forms.IntegerField(widget=forms.NumberInput(attrs={'class':'form-control','value':'0',}))

  key_word = forms.CharField(widget=forms.Textarea(attrs={'class':'form-control','rows':1,'cols':10,'placeholder':'keword values','required':'False'}))


  class Meta:
    model=IAV
    fields=('z_score','screens','flu_proteins','key_word')

  def save(self,for_page,z_score,screens,flu_proteins,key_word):
    self.instance.sess = for_page
    self.instance.z_score = z_score
    self.instance.screens = screens
    self.instance.flu_proteins = flu_proteins
    self.instance.key_word = key_word
    return super().save()

考虑到模型存在 'blank=True, null=True' 选项，我不确定如何不允许将此字段留空。

小部件也说它不是必需的。

Answer 1

尝试这个：

class IAVForm(forms.ModelForm):
  z_score = forms.DecimalField(widget=forms.NumberInput(attrs={'class':'form-control','value':'0.0',}))
  screens = forms.IntegerField(widget=forms.NumberInput(attrs={'class':'form-control','value':'0',}))
  flu_proteins = forms.IntegerField(widget=forms.NumberInput(attrs={'class':'form-control','value':'0',}))
  key_word = forms.CharField(required=False, widget=forms.Textarea(attrs={'class':'form-control','rows':1,'cols':10,'placeholder':'keword values'}))

首先，您可以创建该类(forms.ModelForm).此外，您还可以required=False在引号内并作为属性。删除引号并将其放在小部件的属性之前。

看看是否有效。