Question

我已按照说明完成了Django成功使用SQLite的入门教程。但是，对于我的真实项目，我想使用MySQL，所以我删除了教程项目文件，并开始使用全新设置。麻烦的是，当我运行“python manage.py migrate”时，我得到以下MySQL错误：

_mysql_exceptions.ProgrammingError：（1064，“您的SQL语法出错;请查看与您的MySQL服务器对应的手册在第1行“％s”附近使用正确语法的版本。“

我在网站设置数据库部分中有以下内容：

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'vocabulator$database',
        'USER': 'vocabulator',
        'PASSWORD': '<password>',
        'HOST': 'mysql.server', 
    }
}

我在Bash中使用'mysql --user = vocabulator --host = mysql.server --password =＆lt; password＆gt;成功连接到此数据库。 “vocabulator \ $ database”'，所以看来我已经正确输入了这些设置细节。

我还遵循了为Python 3设置数据库绑定的指令，该指令似乎也成功运行。它位于Django文档页面或PythonAnywhere等效页面上，但遗憾的是我无法再找到页面引用。

我自己还没有写过任何MySQL查询，所以任何不正确的查询都必须来自manage.py，那可能是什么原因？完整的错误跟踪引用如下：

Operations to perform:   Synchronize unmigrated apps: staticfiles, messages   Apply all migrations: contenttypes, sessions, admin, auth Synchronizing apps without migrations:   Creating tables...
    Running deferred SQL...   Installing custom SQL... Running migrations:   Rendering model states... DONE   Applying contenttypes.0001_initial...Traceback (most recent call last):   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/mysql/base.py", line 124, in execute
    return self.cursor.execute(query, args)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/cursors.py", line 184, in execute
    self.errorhandler(self, exc, value)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/connections.py", line 37, in defaulterrorhandler
    raise errorvalue   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/cursors.py", line 171, in execute
    r = self._query(query)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/cursors.py", line 330, in _query
    rowcount = self._do_query(q)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/cursors.py", line 294, in _do_query
    db.query(q)
_mysql_exceptions.ProgrammingError: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%s' at line 1")

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

Traceback (most recent call last):   File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
    utility.execute()   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/core/management/__init__.py", line 330, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/core/management/base.py", line 393, in run_from_argv
    self.execute(*args, **cmd_options)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/core/management/base.py", line 444, in execute
    output = self.handle(*args, **options)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/core/management/commands/migrate.py", line 222, in handle
    executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/migrations/executor.py", line 110, in migrate
    self.apply_migration(states[migration], migration, fake=fake, fake_initial=fake_initial)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/migrations/executor.py", line 148, in apply_migration
    state = migration.apply(state, schema_editor)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/migrations/migration.py", line 115, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/migrations/operations/models.py", line 59, in database_forwards
    schema_editor.create_model(model)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/base/schema.py", line 289, in create_model
    self.deferred_sql.extend(self._model_indexes_sql(model))   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/mysql/schema.py", line 55, in _model_indexes_sql
    self.connection.cursor(), model._meta.db_table   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/mysql/introspection.py", line 142, in get_storage_engine
    "WHERE table_name = %s", [table_name])   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/utils.py", line 79, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/utils.py", line 97, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/utils/six.py", line 658, in reraise
    raise value.with_traceback(tb)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/django/db/backends/mysql/base.py", line 124, in execute
    return self.cursor.execute(query, args)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/cursors.py", line 184, in execute
    self.errorhandler(self, exc, value)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/connections.py", line 37, in defaulterrorhandler
    raise errorvalue   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/cursors.py", line 171, in execute
    r = self._query(query)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/cursors.py", line 330, in _query
    rowcount = self._do_query(q)   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-packages/MySQLdb/cursors.py", line 294, in _do_query
    db.query(q) django.db.utils.ProgrammingError: (1064, "You have an error in your  SQL syntax; check the manual that corresponds to your MySQL server v ersion for the right syntax to use near '%s' at line 1") Exception ignored in: <bound method Cursor.__del__ of <MySQLdb.curso rs.Cursor object at 0x7feec394b940>> Traceback (most recent call last):   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-p ackages/MySQLdb/cursors.py", line 67, in __del__   File "/home/vocabulator/.virtualenvs/django18/lib/python3.4/site-p ackages/MySQLdb/cursors.py", line 73, in close ReferenceError: weakly-referenced object no longer exists (django18)03:29 ~/mysite $ mysql --user=vocabulator --host=mysql.server --p mysql: ambiguous option '--p' (pager, plugin_dir)

Answer 1

正如我在上面的评论中所说，我找到了指示我如何安装驱动程序的页面。就是这个：

https://www.pythonanywhere.com/wiki/UsingMySQL

但是，这个Wiki页面现在有点过时了，它指示我安装MySQL连接器版本2.0.1。目前的版本现在是2.0.4。旧版本有一个错误，这意味着它不能与Django 1.8一起运行，如下所述：

http://bugs.mysql.com/bug.php?id=76752

在版本2.0.4中，此错误似乎已得到纠正。

上面引用的PythonAnywhere Wiki页面中的行应更改为：

pip3.4安装https://dev.mysql.com/get/Downloads/Connector-Python/mysql-connector-python-2.0.4.tar.gz

运行此操作后，迁移似乎在我的Django安装上成功运行。

使用MySQL数据库运行“python manage.py migrate”时出现SQL错误

1 个答案: