forms.py 文件源码

def save(self, commit=True):
        instance = super(FormWithRequest, self).save(commit=False)
        # Fix empty strings to None
        for field in self.fields.keys():
            if (hasattr(instance, field)
                and (type(getattr(instance, field)) == unicode or type(getattr(instance, field)) == str)
                and getattr(instance, field) == ''):
                setattr(instance, field, None)
            if (hasattr(instance, field)
                and field in dir(self.Meta.model)
                and type(self.Meta.model._meta.get_field(field)) == models.models.ImageField):
                image = self.cleaned_data[field]
                if image and (isinstance(image, InMemoryUploadedFile) or isinstance(image, TemporaryUploadedFile)):
                    filename = image.name
                    image = shrinkImageFromData(image.read(), filename)
                    setattr(instance, field, image)
        if commit:
            instance.save()
        return instance