在 Django 中使用 ImageField 上传图像

Question

每次单击表单上的提交时，我都会尝试使用 Django 的 ImageField 和表单上传文件。 form.is_valid 返回 false 所以我打印了 forms.errors 它说

photo2
This field is required.

photo1
This field is required.

我选择了我要上传的图片文件，它仍然说是必填项。

这是我的 settings.py

的视图

MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
MEDIA_URL = '/media/'

这里是 views.py

 def upload(request):
 if request.method=="POST":
     prod = Product()
     form = UploadForm(request.POST, request.FILES)
     if form.is_valid():
         prod.name = form.cleaned_data.get('name')
         prod.brand = form.cleaned_data.get('brand')
         prod.material = form.cleaned_data.get('material')
         prod.color = form.cleaned_data.get('color')
         prod.price = form.cleaned_data.get('price')
         prod.discount = form.cleaned_data.get('discount')
         prod.sex=form.cleaned_data.get('sex')
         prod.photo1 = form.cleaned_data('photo1')
         prod.photo2 = form.cleaned_data('photo2')
         prod.save()
         return render(request, 'upload.html', {'form': form})
     else:
         x = form.errors
         return render(request,'upload.html', {'alert':x}, {'form': form})

 else:
     form = UploadForm
     return render(request, 'upload.html', {'form': form})

这是我的 models.py

class Product(models.Model):
    name = models.CharField(max_length=200, default='N/A')
    brand = models.CharField(max_length=50, default='N/A')
    material = models.CharField(max_length=50, default='N/A')
    color = models.CharField(max_length=20, default='N/A')
    price = models.IntegerField(default=0)
    discount = models.IntegerField(default=0)
    discountprice = models.IntegerField(default=0)
    photo1 = models.ImageField(upload_to='productphotos/')
    photo2 = models.ImageField(upload_to='productphotos/')

    Male = 'M'
    Female = 'F'
    Both = 'Both'

    Genders = ((Male, 'Male'),(Female, 'Female'), (Both, 'Both'))
    sex = models.CharField(choices=Genders, default=Male, max_length=6)

forms.py 类 UploadForm(forms.ModelForm):

    class Meta:
        model = Product
        fields = ['name', 'brand', 'material', 'sex', 'color', 'price', 'discount', 'photo1', 'photo2']

在我的模板中 我只是在使用

<div>
 {{form}}
</div>

提前感谢您的帮助。如果需要，我可以上传 forms.py。

Answer 1

您需要在模板中提供表单标记，因为它在渲染{{ form }}时不包含：

<form action="." method="post" enctype="multipart/form-data">
    {% csrf_token %}  # if needed
    {{ form }}
</form>

enctype="multipart/form-data" 在从表单发布文件时必不可少。尤其是docs on forms in general 和file uploads 上的那些：

请注意，request.FILES 仅在请求方法为 POST 且发布请求的表单具有属性 enctype="multipart/form-data" 时才会包含数据。否则，request.FILES 将为空。