Django RuntimeError：超出最大递归深度 [英] Django RuntimeError: maximum recursion depth exceeded

问题描述

我刚刚到Django。我安装Django使用easy_install（在Mac上）和PyDev Django插件为eclipse。我遵循标准程序来创建一个新的PyDev Django项目。当我尝试运行项目作为PyDev：Django，我得到以下错误。

 验证模型... 
 
 RuntimeError：最大递归深度超过
  

我还尝试在manage.py中添加以下行，但没有用。

  sys.setrecursionlimit（2000）
  

部分堆栈跟踪。

 由< bound方法启动的线程中未处理的异常< django.contrib.staticfiles的Command.inner_run。 management.commands.runserver.Command对象在0x10e2 *****>> 
追溯（最近的最后一次调用）：
文件/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/core/management/commands/runserver.py ，line 92，in inner_run 
 self.validate（display_num_errors = True）
文件/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/core/ management / base.py，第280行验证
 num_errors = get_validation_errors（s，app）
文件/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg /django/core/management/validation.py，第35行，get_validation_errors 
 for（app_name，error）in get_app_errors（）。items（）：
文件/Library/Python/2.7/site -packages / Django-1.5-py2.7.egg / django / db / models / loading.py，第166行，get_app_errors 
 self._populate（）
文件/Library/Python/2.7 /site-packages/Django-1.5-py2.7.egg/django/db/models/loading.py，第72行，在_populate 
 self.load_app（app_name，True）
文件/ Library / Python / 2.7 / site-packages / Django-1.5-py2.7.egg / django / db / models / loading.py，第96行，在load_app 
 models = import_module（'。models'，app_name）
文件/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/utils/importlib.py，第35行，import_module 
 __import __（name）
文件/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/contrib/auth/models.py ，< module>中的行370 
 class AbstractUser（AbstractBaseUser，PermissionsMixin）：
文件/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/db/models/base.py，第213行，__new__ 
 new_class.add_to_class（field.name，copy.deepcopy（field））
文件/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg /django/db/models/base.py，第265行，add_to_class 
 value.contribute_to_class（cls，name）
文件/Library/Python/2.7/site-packages/Django-1.5- py2.7.egg / django / db / models / fields / __ init__.py，第257行，在contribut_to_class 
 cls._meta.add_field（self）
文件/Library/Python/2.7/site -packages / Django-1.5-py2.7.egg / django / db / models / options.py，第179行，add_field 
 self.local_fields.insert（bisect（self.local_fields，field），field） 
文件/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py，第56行，< lambda> 
'__lt__'：[（'__gt__'，lambda self，other：other< self），
 File/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2。 7 / functools.py，第56行，< lambda> 
'__lt__'：[（'__gt__'，lambda self，other：other< self），
 File/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2。 7 / functools.py，第56行，< lambda> 
'__lt__'：[（'__gt__'，lambda self，other：other< self），
 File/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2。 7 / functools.py，第56行，< lambda> 
'__lt__'：[（'__gt__'，lambda self，other：other< self），
  

$ b $我做错了什么？

解决方案

问题在于functools.py文件。这个文件来自Python。

要解决这个问题，请将此代码（关于python\Lib\fuctools.py中的第56行）：

  convert = {
'__lt__'：[（'__gt__'，lambda self，other：other< self），
 '__le__'，lambda self，other：not other< self），
（'__ge__'，lambda self，other：not self< other）]，
'__le__'：[（'__ge__ '，lambda self，other：other< = self），
（'__lt__'，lambda self，other：not other< = self），
（'__gt__'，lambda self，other：不自我< = other）]，
'__gt__'：[（'__lt__'，lambda self，other：other> self），
（'__ge__'，lambda self，other：not other > self），
（'__le__'，lambda self，other：not self> other）]，
'__ge__'：[（'__le__'，lambda self，other：other> = self），
（'__gt__'，lambda self，oth呃：不是其他> = self），
（'__lt__'，lambda self，other：not self> = other）] 
} 
  pre> 
 
 
：
  convert = {
 '__lt__'：[（'__gt__'，lambda self，other：not（self<另一个或另一个），
（'__le__'，lambda self，other：self< other或self == other），
（'__ge__'，lambda self，other：not self < other）]，
'__le__'：[（'__ge__'，lambda self，other：not self< = other或self == other），
（'__lt__'其他：self< = other而不是self == other），
（'__gt__'，lambda self，other：not self< = other）]，
'__gt__'：[（'__lt__ '，lambda self，other：not（self> other or self == other）），
（'__ge__'，lambda self，other：self> other或self == other），
 （'__le__'，lambda self，other：not self> other）]，
'__ge__'：[（'__le__'，lambda self，other：（not self> = other）或self == other ），
（'__gt__'，lambda self，other：self> = other而不是self == other），
（'__lt__'，lambda self，other：not self> ; =其他）] 
} 
  
另请阅读： http://regebro.wordpress.com/2010/12/13/ python-implementation-rich-comparison-the-correct-way /  
 
I'm new to Django. I installed Django using easy_install (on a Mac) and PyDev Django plugin for eclipse. I followed standard procedures to create a new PyDev Django project. When I try to run the project as PyDev: Django, I get the following error. 
Validating models...

RuntimeError: maximum recursion depth exceeded
I also tried adding the following line in manage.py, but it's of no use.
sys.setrecursionlimit(2000)
Here's the partial stacktrace.
Unhandled exception in thread started by <bound method Command.inner_run of    <django.contrib.staticfiles.management.commands.runserver.Command object at 0x10e2*****>>
Traceback (most recent call last):
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/core/management/commands/runserver.py", line 92, in inner_run
self.validate(display_num_errors=True)
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/core/management/base.py", line 280, in validate
num_errors = get_validation_errors(s, app)
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/core/management/validation.py", line 35, in get_validation_errors
for (app_name, error) in get_app_errors().items():
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/db/models/loading.py", line 166, in get_app_errors
self._populate()
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/db/models/loading.py", line 72, in _populate
self.load_app(app_name, True)
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/db/models/loading.py", line 96, in load_app
models = import_module('.models', app_name)
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/utils/importlib.py", line 35, in import_module
__import__(name)
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/contrib/auth/models.py", line 370, in <module>
class AbstractUser(AbstractBaseUser, PermissionsMixin):
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/db/models/base.py", line 213, in __new__
new_class.add_to_class(field.name, copy.deepcopy(field))
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/db/models/base.py", line 265, in add_to_class
value.contribute_to_class(cls, name)
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/db/models/fields/__init__.py", line 257, in contribute_to_class
cls._meta.add_field(self)
File "/Library/Python/2.7/site-packages/Django-1.5-py2.7.egg/django/db/models/options.py", line 179, in add_field
self.local_fields.insert(bisect(self.local_fields, field), field)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
'__lt__': [('__gt__', lambda self, other: other < self),
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
'__lt__': [('__gt__', lambda self, other: other < self),
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
'__lt__': [('__gt__', lambda self, other: other < self),
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/functools.py", line 56, in <lambda>
'__lt__': [('__gt__', lambda self, other: other < self),
What am I doing wrong? 
解决方案
The problem is in functools.py file. This file is from Python.

To fix the problem replace this (about line 56 in python\Lib\fuctools.py):
    convert = {
    '__lt__': [('__gt__', lambda self, other: other < self),
               ('__le__', lambda self, other: not other < self),
               ('__ge__', lambda self, other: not self < other)],
    '__le__': [('__ge__', lambda self, other: other <= self),
               ('__lt__', lambda self, other: not other <= self),
               ('__gt__', lambda self, other: not self <= other)],
    '__gt__': [('__lt__', lambda self, other: other > self),
               ('__ge__', lambda self, other: not other > self),
               ('__le__', lambda self, other: not self > other)],
    '__ge__': [('__le__', lambda self, other: other >= self),
               ('__gt__', lambda self, other: not other >= self),
               ('__lt__', lambda self, other: not self >= other)]
}
to that:
    convert = {
    '__lt__': [('__gt__', lambda self, other: not (self < other or self == other)),
               ('__le__', lambda self, other: self < other or self == other),
               ('__ge__', lambda self, other: not self < other)],
    '__le__': [('__ge__', lambda self, other: not self <= other or self == other),
               ('__lt__', lambda self, other: self <= other and not self == other),
               ('__gt__', lambda self, other: not self <= other)],
    '__gt__': [('__lt__', lambda self, other: not (self > other or self == other)),
               ('__ge__', lambda self, other: self > other or self == other),
               ('__le__', lambda self, other: not self > other)],
    '__ge__': [('__le__', lambda self, other: (not self >= other) or self == other),
               ('__gt__', lambda self, other: self >= other and not self == other),
               ('__lt__', lambda self, other: not self >= other)]
}
Read also: http://regebro.wordpress.com/2010/12/13/python-implementing-rich-comparison-the-correct-way/

                        
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