신선한 데이터베이스로 장고 마이그레이션이 실패했습니다.

Question

다른 사람이 장고 마이그레이션으로 인해 불만을 느끼고 있는지 궁금합니다. 나는 SO 관련 게시물을 여러 번 살펴 봤지만이 문제를 특별히 해결하지 못했습니다.

이것은 나에게도 계속 발생하며 일반적인 시나리오 여야합니다. 그래서 무엇이 누락 되었습니까?

내 시나리오 :

1. 목록 항목 내 로컬 컴퓨터에 SQLite는 사용하여 반복
2. 내가 지금 생산에 PostgreSQL을 데시벨 (AWS 또는 다른 곳에 배포 할, 장고 응용 프로그램을 구축 한
3. )
4. 새 데이터베이스를 설정하여 설정에 추가하고 실행하십시오. python manage.py migrate
5. 내 모델 테이블 중 하나가 존재하지 않는다는 SQL 오류가 발생합니다. 이런! 이것이 내가 마이그레이션을 실행하는 이유입니다. 내가 무엇을해야합니까 -
6. 나는 simple_history

나는 명백한 대답이 있어야 확신처럼 패키지와 더 문제를 만들어 python manage.py migrate <app_name> --fake 같은 이상한 일을, 테이블을 손으로 만들 필요 결국 아주 깨끗한 데이터베이스에 데이터베이스 스키마를 설정 하시겠습니까? 나는 빈 데이터베이스에 python manage.py migrate을 실행하면

, 나는 다음과 같은 오류가 발생합니다 : :

---

편집 : 오류가 난 점점 오전의 역 추적은

(banzai-platform-django) ➜ src git:(master) ✗ ./manage.py migrate 
Traceback (most recent call last): 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/backends/utils.py", line 65, in execute 
    return self.cursor.execute(sql, params) 
psycopg2.ProgrammingError: relation "events_event" does not exist 
LINE 1: ...ents_event"."created", "events_event"."slug" FROM "events_ev... 
                  ^


The above exception was the direct cause of the following exception: 

Traceback (most recent call last): 
    File "./manage.py", line 22, in <module> 
    execute_from_command_line(sys.argv) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/management/__init__.py", line 363, in execute_from_command_line 
    utility.execute() 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/management/__init__.py", line 355, in execute 
    self.fetch_command(subcommand).run_from_argv(self.argv) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/management/base.py", line 283, in run_from_argv 
    self.execute(*args, **cmd_options) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/management/base.py", line 327, in execute 
    self.check() 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/management/base.py", line 359, in check 
    include_deployment_checks=include_deployment_checks, 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 62, in _run_checks 
    issues.extend(super(Command, self)._run_checks(**kwargs)) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/management/base.py", line 346, in _run_checks 
    return checks.run_checks(**kwargs) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/checks/registry.py", line 81, in run_checks 
    new_errors = check(app_configs=app_configs) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/checks/urls.py", line 16, in check_url_config 
    return check_resolver(resolver) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/core/checks/urls.py", line 26, in check_resolver 
    return check_method() 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/urls/resolvers.py", line 254, in check 
    for pattern in self.url_patterns: 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__ 
    res = instance.__dict__[self.name] = self.func(instance) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/urls/resolvers.py", line 405, in url_patterns 
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__ 
    res = instance.__dict__[self.name] = self.func(instance) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/urls/resolvers.py", line 398, in urlconf_module 
    return import_module(self.urlconf_name) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/importlib/__init__.py", line 126, in import_module 
    return _bootstrap._gcd_import(name[level:], package, level) 
    File "<frozen importlib._bootstrap>", line 978, in _gcd_import 
    File "<frozen importlib._bootstrap>", line 961, in _find_and_load 
    File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked 
    File "<frozen importlib._bootstrap>", line 655, in _load_unlocked 
    File "<frozen importlib._bootstrap_external>", line 678, in exec_module 
    File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/src/banzai_platform/urls.py", line 67, in <module> 
    url(r'^registrations/', include('registrations.urls')), 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/conf/urls/__init__.py", line 50, in include 
    urlconf_module = import_module(urlconf_module) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/importlib/__init__.py", line 126, in import_module 
    return _bootstrap._gcd_import(name[level:], package, level) 
    File "<frozen importlib._bootstrap>", line 978, in _gcd_import 
    File "<frozen importlib._bootstrap>", line 961, in _find_and_load 
    File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked 
    File "<frozen importlib._bootstrap>", line 655, in _load_unlocked 
    File "<frozen importlib._bootstrap_external>", line 678, in exec_module 
    File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/src/registrations/urls.py", line 3, in <module> 
    from .views import (
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/src/registrations/views.py", line 160, in <module> 
    class ConfirmEventListView(ListView): 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/src/registrations/views.py", line 164, in ConfirmEventListView 
    queryset = [obj for obj in events if obj.need_confirmation > 0] 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/models/query.py", line 250, in __iter__ 
    self._fetch_all() 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/models/query.py", line 1118, in _fetch_all 
    self._result_cache = list(self._iterable_class(self)) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/models/query.py", line 53, in __iter__ 
    results = compiler.execute_sql(chunked_fetch=self.chunked_fetch) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 894, in execute_sql 
    raise original_exception 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 884, in execute_sql 
    cursor.execute(sql, params) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/backends/utils.py", line 80, in execute 
    return super(CursorDebugWrapper, self).execute(sql, params) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/backends/utils.py", line 65, in execute 
    return self.cursor.execute(sql, params) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__ 
    six.reraise(dj_exc_type, dj_exc_value, traceback) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise 
    raise value.with_traceback(tb) 
    File "/Users/joedavy/Dropbox/Apps/banzai-platform-django/lib/python3.6/site-packages/django/db/backends/utils.py", line 65, in execute 
    return self.cursor.execute(sql, params) 
django.db.utils.ProgrammingError: relation "events_event" does not exist 
LINE 1: ...ents_event"."created", "events_event"."slug" FROM "events_ev... 

Answer 1

귀하의 역 추적을 보여줍니다 그 ConfirmEventListView 내부의 클래스 수준에서 쿼리 세트를 통해 목록 이해력을 실행하고 있습니다. 클래스 수준의 모든 것은 클래스를 처음 가져올 때 실행됩니다. 따라서이 쿼리는 Django 명령이 실행 된 즉시 완료됩니다. 즉, 마이그레이션이 실행되기 전에 수행됩니다.

이 수준에서는 데이터베이스에 액세스하는 작업을 절대로해서는 안됩니다. (솔직하게 말하면,이리스트의 이해는 쿼리 세트가 아닌리스트를 반환하기 때문에 그러지 않아야하므로, 페이지 설정이나 실제 쿼리 세트를 기대하는 다른 것들은 작동하지 않을 것입니다. 그러나 나머지 코드가 작동하면 문제가 아닌 것으로 간주 할 수 있습니다.)

need_confirmation이 필드 인 경우 쿼리 세트는 Event.objects.filter(need_confirmation__gt=0)으로 정의해야합니다. 그러나 모델 메서드 인 경우 ConfirmEventListView에 get_queryset() 메서드를 정의하고 클래스 수준이 아닌이 처리를 수행해야합니다.