django迁移报AttributeError: 'str' o

迁移django是遇到异常：

Traceback (most recent call last):

  File "manage.py", line 15, in <module>

    execute_from_command_line(sys.argv)

  File "/usr/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 381, in execute_from_command_line

    utility.execute()

  File "/usr/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 375, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 323, in run_from_argv

    self.execute(*args, **cmd_options)

  File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 364, in execute

    output = self.handle(*args, **options)

  File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 83, in wrapped

    res = handle_func(*args, **kwargs)

  File "/usr/local/lib/python3.5/dist-packages/django/core/management/commands/makemigrations.py", line 101, in handle

    loader.check_consistent_history(connection)

  File "/usr/local/lib/python3.5/dist-packages/django/db/migrations/loader.py", line 283, in check_consistent_history

    applied = recorder.applied_migrations()

  File "/usr/local/lib/python3.5/dist-packages/django/db/migrations/recorder.py", line 73, in applied_migrations

    if self.has_table():

  File "/usr/local/lib/python3.5/dist-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 "/usr/local/lib/python3.5/dist-packages/django/db/backends/base/base.py", line 256, in cursor

    return self._cursor()

  File "/usr/local/lib/python3.5/dist-packages/django/db/backends/base/base.py", line 233, in _cursor

    self.ensure_connection()

  File "/usr/local/lib/python3.5/dist-packages/django/db/backends/base/base.py", line 217, in ensure_connection

    self.connect()

  File "/usr/local/lib/python3.5/dist-packages/django/db/backends/base/base.py", line 197, in connect

    self.init_connection_state()

  File "/usr/local/lib/python3.5/dist-packages/django/db/backends/mysql/base.py", line 231, in init_connection_state

    if self.features.is_sql_auto_is_null_enabled:

  File "/usr/local/lib/python3.5/dist-packages/django/utils/functional.py", line 80, in __get__

    res = instance.__dict__[self.name] = self.func(instance)

  File "/usr/local/lib/python3.5/dist-packages/django/db/backends/mysql/features.py", line 82, in is_sql_auto_is_null_enabled

    cursor.execute('SELECT @@SQL_AUTO_IS_NULL')

  File "/usr/local/lib/python3.5/dist-packages/django/db/backends/utils.py", line 103, in execute

    sql = self.db.ops.last_executed_query(self.cursor, sql, params)

  File "/usr/local/lib/python3.5/dist-packages/django/db/backends/mysql/operations.py", line 146, in last_executed_query

    query = query.decode(errors='replace')

AttributeError: 'str' object has no attribute 'decode'

顺着异常文件点进去找到：

query = query.decode(errors=‘replace’)

将decode改为encode

或者注释掉判断即可。