Question

当我为Field对象的变量赋值时，为什么在重新加载ModelForm时没有重新赋值为默认值？

文件

class CustomFile(ImageFile, FieldFile):
    def save(self, name, content, save = True):
        if self.field.override_name:
            self(CustomFile, self).save(self.field.override_name, content, save = save)
        else:
            self(CustomFile, self).save(generate_name(self.instance, name), content, save = save)

字段

class CustomImageField(ImageField):
    attr_class = CustomFile
    def __init__(self, overrided_name, *args, **kwargs):
        self.overrided_name = overrided_name
        super(CustomImageField, self).__init__(*args, **kwargs)

模型

class Test(models.Model):
    email = models.EmailField()
    file = CustomImageField()

AdminForm

class TestForm(ModelForm):
    def __init__(self, *args, **kwargs):
        super(TestForm, self).__init__(*args, **kwargs)
        self.old_instance = self.instance

管理

class TestAdmin(Test):
    form = TestForm

    def save_model(self, request, obj, form, change):
        if form.old_instance:
            form.old_instance.file.delete(save = True)
            form.old_instance.file.field.override_name = form.old_instance.name
        obj.save()

admin.site.register(Test, TestAdmin)

我的问题是我上传的每个图片都会有相同的名称，直到我重新启动服务器！为什么对象不会改变？！特别是Field对象......当我跟踪它时将产生相同的对象。

我已经解决了这个问题：

class CustomFile(ImageFile, FieldFile):
    def save(self, name, content, save = True):
        if self.field.override_name:
            self(CustomFile, self).save(self.field.override_name, content, save = save)
            self.field.override_name = None
        else:
            self(CustomFile, self).save(generate_name(self.instance, name), content, save = save)

我正在使用Django 1.2.6，Python 2.6和Windows！

Answer 1

我只是在猜测，但这段代码不是错了吗？

form = TestForm

它不应该是创建实例而不是引用类吗？

form = TestForm()

或者同样的事情在这里？

attr_class = CustomFile  - > attr_class = CustomFile()

Django - 模型字段保持相同的值！

1 个答案: