Question

class Data(models.Model):
    title = models.CharField(max_length=255)
    slug = models.SlugField()

class Photo(models.Model):
    photo = models.ImageField(upload_to='img')
    data = models.ForeignKey(Data)

forms.py：

class DataForm(ModelForm):
    class Meta:
        model = Data

如何添加到此表单照片上传？

Answer 1

至少有两种可能的答案：

一个。使用两个表单并将它们发布到同一视图。首先保留Data对象，然后创建Photo对象而不将其提交到数据库，将数据属性分配给data实例，然后在.save()上调用photo {1}}实例（下面提供的示例）。

B中。使用内嵌模型formset：https://docs.djangoproject.com/en/dev/topics/forms/modelforms/#inline-formsets

[编辑]

class Data(models.Model):
    title = models.CharField(max_length=255)
    slug = models.SlugField()

class Photo(models.Model):
    photo = models.ImageField(upload_to='img')
    data = models.ForeignKey(Data)

class DataForm(forms.ModelForm):
    class Meta:
        model = Data

class PhotoForm(forms.ModelForm):
    class Meta:
        model = Photo
        exclude = ('data',)

def your_view(request):
    data_form = DataForm(request.POST or None)
    photo_form = PhotoForm(request.POST or None, request.FILES or None)

    if request.method == 'POST':
        if data_form.is_valid() and photo_form.is_valid():
            data = data_form.save()
            photo = photo_form.save(commit=False)
            photo.data = data
            photo.save()
            # do something else here, like a redirect to another view.
    return render(request, 'your-template.html',
        {'data_form': data_form, 'photo_form': photo_form})

确保您的表单正在使用：multipart/form-data作为enctype，或request.FILES将为空。

Answer 2

手动ImageField添加到表单并覆盖save方法以创建照片：

class DataForm(ModelForm):
    class Meta:
        model = Data
    photo = forms.ImageField()

    def save(self, *arg, **kwargs):
        data = super(DataForm, self).save(*arg, **kwargs)
        if 'photo' in self.data :
           Photo.objects.create(
              photo=self.data['photo'],
              data=data
           )
        return data

模型与外键形成

2 个答案: