Я переключаюсь на Django 1.7. Когда я пытаюсь makemigrations для моего приложения, он падает. В докладе крах:Django 1.7 makemigrations - ValueError: Невозможно выполнить сериализацию функции: lambda
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
я нашел записку о том, что здесь https://code.djangoproject.com/ticket/22892
Существует также ссылки на документацию https://docs.djangoproject.com/en/dev/topics/migrations/#serializing-values
Но это не делает его более ясным для меня. Ошибка meassage не дал мне ключ, где искать проблему.
Есть ли способ, как определить, какая строка точно вызывает проблему?
Любые подсказки?
Как выглядит ваше поле 'Product.dataqualityissue'? – Alasdair
@Alasdair Это 'product = models.ForeignKey (Product, blank = True, null = True)' – matousc
ОК, это поле выглядит нормально. Используете ли вы лямбда-функции в модели «Product» или в любой другой модели? – Alasdair