Django需要模型形式的字段

Question

我有一个表格,当我不想要它们时,根据需要出现几个字段.这是models.py的表单

class CircuitForm(ModelForm):
    class Meta:
        model = Circuit
        exclude = ('lastPaged',)
    def __init__(self, *args, **kwargs):
        super(CircuitForm, self).__init__(*args, **kwargs)
        self.fields['begin'].widget = widgets.AdminSplitDateTime()
        self.fields['end'].widget = widgets.AdminSplitDateTime()

在实际的Circuit模型中,字段定义如下:

begin = models.DateTimeField('Start Time', null=True, blank=True)
end = models.DateTimeField('Stop Time', null=True, blank=True)

我的views.py就在这里:

def addCircuitForm(request):
    if request.method == 'POST':
        form = CircuitForm(request.POST)
        if form.is_valid():
            form.save()
            return HttpResponseRedirect('/sla/all')
    form = CircuitForm()    
    return render_to_response('sla/add.html', {'form': form})

我该怎么办才能不需要这两个字段？

Answer 1

如果您不想修改模型中字段的空白设置(这样做会破坏管理站点中的正常验证),您可以在Form类中执行以下操作:

def __init__(self, *args, **kwargs):
    super(CircuitForm, self).__init__(*args, **kwargs)

    for key in self.fields:
        self.fields[key].required = False 

重新定义的构造函数不会损害任何功能.

Answer 2

如果模型字段为空= True,则表单字段上的required设置为False.否则,required = True

在这里说:http://docs.djangoproject.com/en/dev/topics/forms/modelforms/

看起来你正在做的一切正确.你可以检查一下它的值self.fields['end'].required.

Answer 3

扩展 DataGreed 的答案，我创建了一个 Mixin，允许您fields_required在Meta类上指定一个变量，如下所示：

class MyForm(RequiredFieldsMixin, ModelForm):

    class Meta:
        model = MyModel
        fields = ['field1', 'field2']
        fields_required = ['field1']

这里是：

class RequiredFieldsMixin():

    def __init__(self, *args, **kwargs):

        super().__init__(*args, **kwargs)

        fields_required = getattr(self.Meta, 'fields_required', None)

        if fields_required:
            for key in self.fields:
                if key not in fields_required:
                    self.fields[key].required = False