Django设置默认表单值-Java 学习之路

198

我有一个模型如下 .

class TankJournal(models.Model):
  user = models.ForeignKey(User)
  tank = models.ForeignKey(TankProfile)
  ts = models.IntegerField(max_length=15)
  title = models.CharField(max_length=50)
  body = models.TextField()

我还有一个上述模型的模型表格如下 .

class JournalForm(ModelForm):
    tank = forms.IntegerField(widget=forms.HiddenInput()) 

    class Meta:
        model = TankJournal
        exclude = ('user','ts')

我想知道如何设置该坦克隐藏字段的默认值 . 这是我到目前为止显示/保存表单的函数

def addJournal(request, id=0):
    if not request.user.is_authenticated():
        return HttpResponseRedirect('/')

    #
    # checking if they own the tank
    #
    from django.contrib.auth.models import User
    user = User.objects.get(pk=request.session['id'])

    if request.method == 'POST':
        form = JournalForm(request.POST)
        if form.is_valid():
            obj = form.save(commit=False)

            #
            # setting the user and ts
            #
            from time import time
            obj.ts = int(time())
            obj.user = user

            obj.tank = TankProfile.objects.get(pk=form.cleaned_data['tank_id'])

            #
            # saving the test
            #
            obj.save()

    else:
        form = JournalForm()

    try:
        tank = TankProfile.objects.get(user=user, id=id)
    except TankProfile.DoesNotExist:
        return HttpResponseRedirect('/error/')

    form.tank = id
    return render_to_response('ajax/tank_addJournal.html', {'form': form}, context_instance=RequestContext(request))

谢谢 .

4 回答

15
您可以使用初始解释here

调用表单构造函数时，有两个选项可以填充值：
```
form = JournalForm(initial={'tank': 123})
```
或者在表单定义中设置值：
```
tank = forms.IntegerField(widget=forms.HiddenInput(), initial=123)
```
回复于 2024-04-29T23:34:02+08:00
10
如果从POST值创建modelform，则可以通过以下方式分配initial：
```
form = SomeModelForm(request.POST or None, initial={"option": "10"})
```
https://docs.djangoproject.com/en/1.10/topics/forms/modelforms/#providing-initial-values
回复于 2024-04-29T23:34:02+08:00
6
其他解决方案：创建表单后设置初始值：
```
form.fields['tank'].initial = 123
```
回复于 2024-04-29T23:34:02+08:00

354

我有另外一个解决方案（我发布它以防万一其他人，因为我使用模型中的以下方法）：

class onlyUserIsActiveField(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(onlyUserIsActiveField, self).__init__(*args, **kwargs)
        self.fields['is_active'].initial = False

    class Meta:
        model = User
        fields = ['is_active']
        labels = {'is_active': 'Is Active'}
        widgets = {
            'is_active': forms.CheckboxInput( attrs={
                            'class':          'form-control bootstrap-switch',
                            'data-size':      'mini',
                            'data-on-color':  'success',
                            'data-on-text':   'Active',
                            'data-off-color': 'danger',
                            'data-off-text':  'Inactive',
                            'name':           'is_active',

            })
        }

初始值在 __init__ 函数上定义为 self.fields['is_active'].initial = False

回复于 2024-04-29T23:34:02+08:00

Django设置默认表单值

4 回答

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