我切换到Django 1.7.当我为我的应用程序尝试makemigrations时,它会崩溃.崩溃报告是：
Migrations for 'roadmaps':
0001_initial.py:
- Create model DataQualityIssue
- Create model MonthlyChange
- Create model Product
- Create model ProductGroup
- Create model RecomendedStack
- Create model RecomendedStackMembership
- Create model RoadmapMarket
- Create model RoadmapUser
- Create model RoadmapVendor
- Create model SpecialEvent
- Create model TimelineEvent
- Create model UserStack
- Create model UserStackMembership
- Add field products to userstack
- Add field viewers to userstack
- Add field products to recomendedstack
- Add field product_group to product
- Add field vendor to product
- Add field product to dataqualityissue
Traceback (most recent call last):
File "manage.py",line 29,in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py",line 385,in execute_from_command_line
utility.execute()
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py",line 377,in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py",line 288,in run_from_argv
self.execute(*args,**options.__dict__)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py",line 338,in execute
output = self.handle(*args,**options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/makemigrations.py",line 124,in handle
self.write_migration_files(changes)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/makemigrations.py",line 152,in write_migration_files
migration_string = writer.as_string()
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/writer.py",line 129,in as_string
operation_string,operation_imports = OperationWriter(operation).serialize()
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/writer.py",line 80,in serialize
arg_string,arg_imports = MigrationWriter.serialize(item)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/writer.py",line 245,in serialize
item_string,item_imports = cls.serialize(item)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/writer.py",line 310,in serialize
return cls.serialize_deconstructed(path,args,kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/writer.py",line 221,in serialize_deconstructed
arg_string,arg_imports = cls.serialize(arg)
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/writer.py",line 323,in serialize
raise ValueError("Cannot serialize function: lambda")
ValueError: Cannot serialize function: lambda
我在https://code.djangoproject.com/ticket/22892找到了关于这个的说明
还有文档https://docs.djangoproject.com/en/dev/topics/migrations/#serializing-values的链接
但它并没有让我更清楚.错误消息没有给我一个线索在哪里寻找问题.
有没有办法如何检测究竟是什么线导致问题？
任何提示？