使用def _str __（self）调用Python对象时超过了最大递归深度：当我删除内联表单对象时

class Correction_Factors(models.Model): Treatment_unit= models.ManyToManyField(Unit,blank=False) def __str__(self): return u", ".join([a.name for a in self.Treatment_unit.all()])

Environment: Request Method: POST Request URL: http://127.0.0.1:8000/admin/output/dosimetry_system/18/change/ Django Version: 2.2.18 Python Version: 3.9.2 Installed Applications: ['django.contrib.admin', 'django.contrib.contenttypes', 'django.contrib.auth', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.humanize', 'django_extensions', 'django_q', 'django_comments', 'formtools', 'django_filters', 'rest_framework', 'rest_framework_filters', 'rest_framework.authtoken', 'listable', 'genericdropdown', 'recurrence', 'widget_tweaks', 'dynamic_raw_id', 'mptt', 'django_mptt_admin', 'qatrack.cache', 'qatrack.accounts', 'qatrack.units', 'qatrack.qa', 'qatrack.qatrack_core', 'qatrack.notifications', 'qatrack.contacts', 'qatrack.issue_tracker', 'qatrack.service_log', 'qatrack.parts', 'qatrack.faults', 'qatrack.attachments', 'qatrack.reports', 'admin_views', 'qatrack.output', 'simple_history'] Installed Middleware: ['django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'qatrack.middleware.login_required.LoginRequiredMiddleware', 'qatrack.middleware.maintain_filters.FilterPersistMiddleware'] Traceback: File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\exception.py" in inner 34. response = get_response(request) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\base.py" in _get_response 115. response = self.process_exception_by_middleware(e, request) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\base.py" in _get_response 113. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\admin\options.py" in wrapper 606. return self.admin_site.admin_view(view)(*args, **kwargs) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\decorators.py" in _wrapped_view 142. response = view_func(request, *args, **kwargs) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func 44. response = view_func(request, *args, **kwargs) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\admin\sites.py" in inner 223. return view(request, *args, **kwargs) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\admin\options.py" in change_view 1648. return self.changeform_view(request, object_id, form_url, extra_context) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\decorators.py" in _wrapper 45. return bound_method(*args, **kwargs) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\utils\decorators.py" in _wrapped_view 142. response = view_func(request, *args, **kwargs) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\admin\options.py" in changeform_view 1529. return self._changeform_view(request, object_id, form_url, extra_context) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\admin\options.py" in _changeform_view 1574. change_message = self.construct_change_message(request, form, formsets, add) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\admin\options.py" in construct_change_message 1050. return construct_change_message(form, formsets, add) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\admin\utils.py" in construct_change_message 520. 'object': str(deleted_object), File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all() File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__ 527. return self.related_manager_cls(instance) File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__ 838. raise ValueError('"%r" needs to have a value for field "%s" before ' File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\base.py" in __repr__ 519. return '<%s: %s>' % (self.__class__.__name__, self) File "H:\Python projects\deploy\qatrackplus\qatrack\output\models.py" in __str__ 207. list_01 =self.Treatment_unit.all()

1条回答

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1楼 · 发布于 2024-09-28 05:34:48

我猜问题与此错误消息有关：

File "C:\Users\mmetwaly\AppData\Local\Programs\Python\Python39\lib\site-packages\
django\db\models\fields\related_descriptors.py" in __init__
   838.           raise ValueError('"%r" needs to have a value for field "%s" before '

我会在那个里设置一个断点，然后运行调试器来查看发生了什么

如果您创建了一组最少的代码来演示问题，然后完整地发布代码，那么帮助您会更容易

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