python type_error ai_generated true

'Manager'对象没有属性'filter_by'

'Manager' object has no attribute 'filter_by'

ID: python/django-attribute-error-manager

其他格式: JSON · Markdown 中文 · English
80%修复率
84%置信度
0证据数
2024-05-12首次发现

版本兼容性

版本状态引入弃用备注
3.x active — — —

根因分析

在管理器上调用不存在的自定义方法，或使用错误的语法。

English

Calling a custom method on a manager that doesn't exist, or using incorrect syntax.

generic

解决方案

  1. 95% 成功率 Define custom manager method 
    class MyModelManager(models.Manager):
    def filter_by(self, **kwargs):
        return self.filter(**kwargs)
class MyModel(models.Model):
    objects = MyModelManager()
  2. 90% 成功率 Use standard filter instead 
    MyModel.objects.filter(field=value)

无效尝试

常见但无效的做法:

  1. Assuming default manager has custom methods 90% 失败

    Default manager only provides standard QuerySet methods.

  2. Using objects.filter_by without defining it 80% 失败

    Method must be defined in custom manager.