python - Django: django.db.utils.InternalError: (1046, u'No database selected')
问题描述
我正在尝试将 Django 与 mariadb 10.4.8 一起使用我的 settings.py 文件如下:
DATABASES = {
'default': {
'NAME:': 'mydb',
'ENGINE': 'django.db.backends.mysql',
'USER': 'staff',
'PASSWORD': 'mypassword',
'HOST': 'localhost',
'PORT': '',
}
}
在初始化.py 中:
import pymysql
pymysql.install_as_MySQLdb()
“./manage.py makemigrations”和“./manage.py migrate”产生相同的错误:
File "./manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 356, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 83, in handle
executor = MigrationExecutor(connection, self.migration_progress_callback)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 20, in __init__
self.loader = MigrationLoader(self.connection)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 52, in __init__
self.build_graph()
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 210, in build_graph
self.applied_migrations = recorder.applied_migrations()
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 65, in applied_migrations
self.ensure_schema()
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 52, in ensure_schema
if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()):
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/backends/base/introspection.py", line 55, in table_names
return get_names(cursor)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/backends/base/introspection.py", line 50, in get_names
return sorted(ti.name for ti in self.get_table_list(cursor)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/backends/mysql/introspection.py", line 56, in get_table_list
cursor.execute("SHOW FULL TABLES")
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 79, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute
return self.cursor.execute(sql, params)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 62, in execute
return self.cursor.execute(sql)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 101, in execute
return self.cursor.execute(query, args)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/pymysql/cursors.py", line 170, in execute
result = self._query(query)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/pymysql/cursors.py", line 328, in _query
conn.query(q)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/pymysql/connections.py", line 517, in query
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/pymysql/connections.py", line 732, in _read_query_result
result.read()
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/pymysql/connections.py", line 1075, in read
first_packet = self.connection._read_packet()
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/pymysql/connections.py", line 684, in _read_packet
packet.check_error()
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/pymysql/protocol.py", line 220, in check_error
err.raise_mysql_exception(self._data)
File "/home/ubuntu/wemu_app/wemu_app_env/local/lib/python2.7/site-packages/pymysql/err.py", line 109, in raise_mysql_exception
raise errorclass(errno, errval)
django.db.utils.InternalError: (1046, u'No database selected')
在任何人问之前,是的,我确定数据库存在并且用户有权访问它。我可以通过以下方式确认:
mysql -u staff -r mydb
我正在使用此处找到的教程以防有人好奇: https ://www.digitalocean.com/community/tutorials/how-to-use-mysql-or-mariadb-with-your-django-application-on- ubuntu-14-04
有任何想法吗?我在这里扯头发。
解决方案
您正在尝试使用MySQL
后端引擎连接到MariaDB
.
'ENGINE': 'django.db.backends.mysql',
最近在 Django 3.0 中添加了对 MariaDB 的官方支持。不过,它仍处于 Alpha 测试阶段。
https://docs.djangoproject.com/en/dev/releases/3.0/
我认为您最好使用 MySQL 数据库以避免进一步的问题。
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