我正在使用django 1.11和django rest version 3。
我使用drf嵌套路由器。对于像/abc/{id}/xyz/这样的makin路径，其中abc和xyz是来自AbcViewSet和XyzViewSet的两个视图。
from rest_framework_nested import routers
router = routers.SimpleRouter()
router.register(r'abc',AbcViewset)
abc_router = routers.NestedSimpleRouter(router,r'abc', lookup='abc')
abc_router.register(r'xyz', XyzViewset, base_name='abc-xyz')
urlpatterns = [
url(r'', include(router.urls)),
]
我得到了以下追溯。我不知道代码发生了什么，错误究竟是什么？
Performing system checks...
Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7fb79f505a60>
Traceback (most recent call last):
File "/home/johan/.local/lib/python3.6/site-packages/django/utils/autoreload.py", line 227, in wrapper
fn(*args, **kwargs)
File "/home/johan/.local/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 125, in inner_run
self.check(display_num_errors=True)
File "/home//.local/lib/python3.6/site-packages/django/core/management/base.py", line 359, in check
include_deployment_checks=include_deployment_checks,
File "/home/johan/.local/lib/python3.6/site-packages/django/core/management/base.py", line 346, in _run_checks
return checks.run_checks(**kwargs)
File "/home/johan/.local/lib/python3.6/site-packages/django/core/checks/registry.py", line 81, in run_checks
new_errors = check(app_configs=app_configs)
File "/home/johan/.local/lib/python3.6/site-packages/django/core/checks/urls.py", line 16, in check_url_config
return check_resolver(resolver)
File "/home/johan/.local/lib/python3.6/site-packages/django/core/checks/urls.py", line 26, in check_resolver
return check_method()
File "/home/johan/.local/lib/python3.6/site-packages/django/urls/resolvers.py", line 254, in check
for pattern in self.url_patterns:
File "/home/johan/.local/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/home/johan/.local/lib/python3.6/site-packages/django/urls/resolvers.py", line 405, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/home/johan/.local/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/home/johan/.local/lib/python3.6/site-packages/django/urls/resolvers.py", line 398, in urlconf_module
return import_module(self.urlconf_name)
File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/johan/Documents/Abc/backend/abc/urls.py", line 24, in <module>
from rest_framework.documentation import include_docs_urls
File "/home/johan/.local/lib/python3.6/site-packages/rest_framework/documentation.py", line 6, in <module>
from rest_framework.schemas import SchemaGenerator, get_schema_view
File "/home/johan/.local/lib/python3.6/site-packages/rest_framework/schemas/__init__.py", line 25, in <module>
from .generators import SchemaGenerator
File "/home/johan/.local/lib/python3.6/site-packages/rest_framework/schemas/generators.py", line 18, in <module>
from rest_framework.compat import (
ImportError: cannot import name 'URLPattern'
如何解决此错误？