[英]I got a database error when Im using Django
Nice to meet you.很高兴见到你。 Im from japan and If im not using properly English,please teach me.我来自日本,如果我没有正确使用英语,请教我。 Let me ask some questions.让我问一些问题。 I created a django project,and tried this code at the terminal.我创建了一个 django 项目,并在终端尝试了这段代码。
python manage.py startapp myhp
Then models.py file has created.然后创建了models.py 文件。 Then I wrote some class and I tried this code at the terminal.然后我写了一些 class 并在终端尝试了这段代码。
python manage.py startapp runserver
Then following error has occured.(I dont know which point is important,so Ill show all)然后出现以下错误。(我不知道哪一点很重要,所以我会全部显示)
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\threading.py", line 926, in _bootstrap_inner
self.run()
File "C:\ProgramData\Anaconda3\lib\threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper
fn(*args, **kwargs)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\core\management\commands\runserver.py", line 120, in inner_run
self.check_migrations()
File "C:\ProgramData\Anaconda3\lib\site-packages\django\core\management\base.py", line 458, in check_migrations
executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\migrations\executor.py", line 18, in __init__
self.loader = MigrationLoader(self.connection)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\migrations\loader.py", line 49, in __init__
self.build_graph()
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\migrations\loader.py", line 212, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\migrations\recorder.py", line 76, in applied_migrations
if self.has_table():
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\migrations\recorder.py", line 56, in has_table
return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\base\introspection.py", line 48, in table_names
return get_names(cursor)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\base\introspection.py", line 43, in get_names
return sorted(ti.name for ti in self.get_table_list(cursor)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\sqlite3\introspection.py", line 73, in get_table_list
ORDER BY name""")
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 100, in execute
return super().execute(sql, params)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 86, in _execute
return self.cursor.execute(sql, params)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql)
File "C:\ProgramData\Anaconda3\lib\site-packages\django\db\backends\sqlite3\base.py", line 394, in execute
return Database.Cursor.execute(self, query)
django.db.utils.DatabaseError: file is not a database
I tried to create the following file at the same directory(hp/myhhp/test.py),and it works well.我尝试在同一目录(hp/myhhp/test.py)中创建以下文件,并且效果很好。
import sqlite3
dbname = 'TEST.db'
conn = sqlite3.connect(dbname)
cur = conn.cursor()
cur.execute('SELECT * FROM persons')
for row in cur:
print(row)
cur.close()
conn.close()
What is the point?重点是什么? Im looking forward to your answer.我期待着你的回答。
you have to say python manage.py runserver , not python python manage.py startapp runserver:) thats why u are getting error.你不得不说python manage.py runserver ,而不是 python python manage.py startapp runserver :) 这就是你得到错误的原因。
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