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

Question

尽管有我最良好的祝愿，但似乎总是需要一个字段，我遇到了麻烦。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留空。

我的模型是这样的。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)

我的看法是这样的

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。你可以看到 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()

考虑到模型有 'blank=True, null=True' 选项，我不确定为什么不允许将此字段留空。

此外，小部件表示不需要它。

Answer 1

试试这个方法。

  def __init__(self, *args, **kwargs):
      super(IAVForm, self).__init__(*args, **kwargs)
      self.fields["key_word"].required = False

我还注意到 key_word 不在您的模型字段中！

Answer 2

试试这个：

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，您只需将 class (forms.ModelForm). 添加到引号内并作为属性。删除引号并将其放在小部件的属性之前。

看看是否可行。

Answer 3

尝试从字段属性中完全删除所需的属性。 Required="True/False" 无效。如果你想禁用它，你必须完全删除它，per the W3C Specs and this article。

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

Django TextField always is required, despite blank=True,Null=True

python

django

backend

web