然后再次制作应用程序，复制设置和模型.先按makemigrations，然后按migrate.然后，我可以简单地复制视图，URL和其他所有内容.出了什么问题?迁移可能会发生问题，再次从头开始进行迁移有助于解决问题. So I was working on my app and added a slugfield to my models. Then as normal went ahead to makemigrations, and a massive red wall of errors appeared.Traceback (most recent call last): File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\backends\utils.py", line 64, in execute return self.cursor.execute(sql, params) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\backends\sqlite3\base.py", line 337, in execute return Database.Cursor.execute(self, query, params)sqlite3.OperationalError: no such table: Reader_mangaThe above exception was the direct cause of the following exception:Traceback (most recent call last): File "C:\Program Files (x86)\JetBrains\PyCharm 2016.2.3\helpers\pycharm\django_manage.py", line 41, in <module> run_module(manage_file, None, '__main__', True) File "C:\Users\Andreas\AppData\Local\Programs\Python\Python35-32\lib\runpy.py", line 182, in run_module return _run_module_code(code, init_globals, run_name, mod_spec) File "C:\Users\Andreas\AppData\Local\Programs\Python\Python35-32\lib\runpy.py", line 96, in _run_module_code mod_name, mod_spec, pkg_name, script_name) File "C:\Users\Andreas\AppData\Local\Programs\Python\Python35-32\lib\runpy.py", line 85, in _run_code exec(code, run_globals) File "D:/WindowsFolders/Documents/Python/ReaderProject\manage.py", line 10, in <module> execute_from_command_line(sys.argv) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\management\__init__.py", line 367, in execute_from_command_line utility.execute() File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\management\__init__.py", line 359, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\management\base.py", line 294, in run_from_argv self.execute(*args, **cmd_options) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\management\base.py", line 342, in execute self.check() File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\management\base.py", line 374, in check include_deployment_checks=include_deployment_checks, File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\management\base.py", line 361, in _run_checks return checks.run_checks(**kwargs) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\checks\registry.py", line 81, in run_checks new_errors = check(app_configs=app_configs) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\checks\urls.py", line 14, in check_url_config return check_resolver(resolver) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\core\checks\urls.py", line 24, in check_resolver for pattern in resolver.url_patterns: File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\utils\functional.py", line 35, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\urls\resolvers.py", line 313, in url_patterns patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\utils\functional.py", line 35, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\urls\resolvers.py", line 306, in urlconf_module return import_module(self.urlconf_name) File "C:\Users\Andreas\AppData\Local\Programs\Python\Python35-32\lib\importlib\__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 986, in _gcd_import File "<frozen importlib._bootstrap>", line 969, in _find_and_load File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 673, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 662, in exec_module File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed File "D:/WindowsFolders/Documents/Python/ReaderProject\ReaderProject\urls.py", line 25, in <module> from Reader import views File "D:/WindowsFolders/Documents/Python/ReaderProject\Reader\views.py", line 7, in <module> from .forms import UploadForm File "D:/WindowsFolders/Documents/Python/ReaderProject\Reader\forms.py", line 12, in <module> class UploadForm(forms.Form): File "D:/WindowsFolders/Documents/Python/ReaderProject\Reader\forms.py", line 15, in UploadForm for manga in mangas: File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\models\query.py", line 256, in __iter__ self._fetch_all() File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\models\query.py", line 1087, in _fetch_all self._result_cache = list(self.iterator()) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\models\query.py", line 54, in __iter__ results = compiler.execute_sql() File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\models\sql\compiler.py", line 835, in execute_sql cursor.execute(sql, params) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\backends\utils.py", line 79, in execute return super(CursorDebugWrapper, self).execute(sql, params) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\backends\utils.py", line 64, in execute return self.cursor.execute(sql, params) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\utils.py", line 94, in __exit__ six.reraise(dj_exc_type, dj_exc_value, traceback) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\utils\six.py", line 685, in reraise raise value.with_traceback(tb) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\backends\utils.py", line 64, in execute return self.cursor.execute(sql, params) File "C:\Users\Andreas\ReaderProject\lib\site-packages\django\db\backends\sqlite3\base.py", line 337, in execute return Database.Cursor.execute(self, query, params)django.db.utils.OperationalError: no such table: Reader_mangaI tried to remove the field I added but no use. I've done pretty much anything that have been suggested on stackoverflow.I also forgot to add the project to github and now don't have the original database files either.The model that seem to be giving the error:class Manga(models.Model): COMPLETED = 'COMP' ONGOING = 'ONG' STATUS_CHOICES = ( (COMPLETED, 'Completed'), (ONGOING, 'Ongoing'), ) JAPANESE_MANGA = 'JM' KOREAN_MANGA = 'KM' CHINESE_MANGA = 'CM' UNKNOWN_MANGA = 'UM' TYPE_CHOICES = ( (JAPANESE_MANGA, 'Japanese Manga'), (KOREAN_MANGA, 'Korean Manhwa'), (CHINESE_MANGA, 'Chinese Manhua'), (UNKNOWN_MANGA, 'Unknown'), ) authors = models.ManyToManyField(Author) genres = models.ManyToManyField(Genre) name = models.CharField(max_length=255, default="") image = models.ImageField(upload_to=upload_manga_cover) summary = models.TextField(max_length=1000) rating = models.IntegerField(default=0) views = models.IntegerField(default=0) rank = models.IntegerField(default=0) alt_names = models.TextField(max_length=400, default="") type = models.CharField( max_length=255, choices=TYPE_CHOICES, default=UNKNOWN_MANGA ) status = models.CharField( max_length=255, choices=STATUS_CHOICES, default=ONGOING, ) released = models.DateField() date_added = models.DateTimeField(auto_now_add=True) date_modified = models.DateTimeField(auto_now=True) slug = models.SlugField(unique=True) def __str__(self): return self.nameTell me what more you need to know to be able to help and I'll add it. 解决方案 So the fastest way to fix this issue was to just copy everything over into a new project(could probably just remove selected parts and re-add them)Then just made the app again, copied the settings and models over. Ran makemigrations then migrate. Then I could just simply copy over the views, urls, and everything else.What went wrong? Maybe something happened to the migrations, and doing the migrations from scratch again helped solve the problem. 这篇关于OperationalError:没有这样的表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！
