我的项目有什么错误？ [英] What's the error in my project?

问题描述

我使用mongodb作为我的python（2.7）项目与django框架。当我给
python manage.py runserver它将工作，但如果我同步db（python manage.py syncdb）以下终端中显示的错误

 创建表... 
追溯（最近的最后一次呼叫）：
文件manage.py，第14行，在< module> 
 execute_manager（settings）
文件/usr/lib/pymodules/python2.7/django/core/management/__init__.py，第438行，在execute_manager 
 utility.execute（） 
文件/usr/lib/pymodules/python2.7/django/core/management/__init__.py，第379行，执行
 self.fetch_command（子命令）.run_from_argv（self.argv） 
文件/usr/lib/pymodules/python2.7/django/core/management/base.py，第191行，在run_from_argv 
 self.execute（* args，** options .__ dict__） 
文件/usr/lib/pymodules/python2.7/django/core/management/base.py，行220，执行
 output = self.handle（* args，** options） 
文件/usr/lib/pymodules/python2.7/django/core/management/base.py，第351行，处理
 return self.handle_noargs（** options）
文件/usr/lib/pymodules/python2.7/django/core/management/commands/syncdb.py，第109行，在handle_noargs 
 emit_post_sync_signal（created_models，verbosity，interactive，db）
文件/ usr / lib目录/ pymodules /python2.7/django/core/management/sql.py，第190行，emit_post_sync_signal 
 interactive = interactive，db = db）
文件/usr/lib/pymodules/python2.7/ django / dispatch / dispatcher.py，第172行，发送
 response = receiver（signal = self，sender =发送者，**命名）
文件/usr/lib/pymodules/python2.7 /django/contrib/auth/management/__init__.py，第41行，在create_permissions 
content_type，codename
文件/usr/lib/pymodules/python2.7/django/db /models/query.py，第107行，在_result_iter 
 self._fill_cache（）
文件/usr/lib/pymodules/python2.7/django/db/models/query.py中，行772，在_fill_cache 
 self._result_cache.append（self._iter.next（））
文件/usr/lib/pymodules/python2.7/django/db/models/query.py ，行959，在迭代器
 for self.query.get_compiler（self.db）.results_iter（）：
文件/usr/local/lib/python2.7/dist-packages/djangotoolbox /db/basecompiler.py，第229行，在result_iter 
中为e ntity in self.build_query（fields）.fetch（low_mark，high_mark）：
文件/usr/local/lib/python2.7/dist-packages/djangotoolbox/db/basecompiler.py，第290行， build_query 
 query.order_by（self._get_ordering（））
文件/usr/local/lib/python2.7/dist-packages/djangotoolbox/db/basecompiler.py，第339行，在_get_ordering 
 raise DatabaseError（排序不能跨越非关系后端（％s）的表）％b $ b  

和

  django.db.utils.DatabaseError：排序不能跨越非关系后端的表（content_type__app_label）
  

如何解决这个问题？

解决方案

您需要使用Django-nonrel而不是Django。

I'm using mongodb for my python(2.7) project with django framework..when i give python manage.py runserver it will work but if i sync the db (python manage.py syncdb) the following error displayed in terminal

Creating tables ...  
Traceback (most recent call last):
  File "manage.py", line 14, in <module>
    execute_manager(settings)   
  File "/usr/lib/pymodules/python2.7/django/core/management/__init__.py", line 438, in execute_manager 
    utility.execute()  
  File "/usr/lib/pymodules/python2.7/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)  
  File "/usr/lib/pymodules/python2.7/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)  
  File "/usr/lib/pymodules/python2.7/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "/usr/lib/pymodules/python2.7/django/core/management/base.py", line 351, in handle
    return self.handle_noargs(**options)
  File "/usr/lib/pymodules/python2.7/django/core/management/commands/syncdb.py", line 109, in handle_noargs
    emit_post_sync_signal(created_models, verbosity, interactive, db)
  File "/usr/lib/pymodules/python2.7/django/core/management/sql.py", line 190, in emit_post_sync_signal
    interactive=interactive, db=db)  
  File "/usr/lib/pymodules/python2.7/django/dispatch/dispatcher.py", line 172, in send
    response = receiver(signal=self, sender=sender, **named)  
  File "/usr/lib/pymodules/python2.7/django/contrib/auth/management/__init__.py", line 41, in create_permissions
    "content_type", "codename"  
  File "/usr/lib/pymodules/python2.7/django/db/models/query.py", line 107, in _result_iter
    self._fill_cache()  
  File "/usr/lib/pymodules/python2.7/django/db/models/query.py", line 772, in _fill_cache
    self._result_cache.append(self._iter.next())
  File "/usr/lib/pymodules/python2.7/django/db/models/query.py", line 959, in iterator
    for row in self.query.get_compiler(self.db).results_iter():
  File "/usr/local/lib/python2.7/dist-packages/djangotoolbox/db/basecompiler.py", line 229, in results_iter
    for entity in self.build_query(fields).fetch(low_mark, high_mark):
  File "/usr/local/lib/python2.7/dist-packages/djangotoolbox/db/basecompiler.py", line 290, in build_query
    query.order_by(self._get_ordering())
  File "/usr/local/lib/python2.7/dist-packages/djangotoolbox/db/basecompiler.py", line 339, in _get_ordering
    raise DatabaseError("Ordering can't span tables on non-relational backends (%s)" % order)

and

django.db.utils.DatabaseError: Ordering can't span tables on non-relational backends (content_type__app_label)

How to solve this problem?

解决方案

You need to use Django-nonrel instead of Django.

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