解决 query = query.decode(errors=‘replace‘)AttributeError

解决 query = query.decode(errors=‘replace’) AttributeError: ‘str’ object has no attribute ‘decode’ Django项目，配置mysql数据的时候，安装mysql之后，配置完成后，运行django项目，出现错误提示信息如何解决这个BUG

query = query.decode(errors='replace')
AttributeError: 'str' object has no attribute 'decode' 

### python3.8+Django2.2
#### 新建一个项目之后，运行项目出现错误

python manage.py runserver

Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.8/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/utils/autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/core/management/commands/runserver.py", line 120, in inner_run
    self.check_migrations()
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/core/management/base.py", line 453, in check_migrations
    executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/migrations/executor.py", line 18, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/migrations/loader.py", line 49, in __init__
    self.build_graph()
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/migrations/loader.py", line 212, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/migrations/recorder.py", line 73, in applied_migrations
    if self.has_table():
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/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 "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/backends/base/base.py", line 256, in cursor
    return self._cursor()
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/backends/base/base.py", line 233, in _cursor
    self.ensure_connection()
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection
    self.connect()
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/backends/base/base.py", line 197, in connect
    self.init_connection_state()
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/backends/mysql/base.py", line 231, in init_connection_state
    if self.features.is_sql_auto_is_null_enabled:
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/utils/functional.py", line 80, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/backends/mysql/features.py", line 82, in is_sql_auto_is_null_enabled
    cursor.execute('SELECT @@SQL_AUTO_IS_NULL')
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-packages/django/db/backends/utils.py", line 103, in execute
    sql = self.db.ops.last_executed_query(self.cursor, sql, params)
  File "/home/victoire/.virtualenvs/enzo/lib/python3.8/site-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'

从网上找了好多解决方法最后这个方法适合我因为我是在虚拟环境下出的错你需要在你的虚拟环境下找到这个文件把your_env_name替换成你的虚拟环境名字

~/.virtualenvs/your_env_name/lib/python3.8/site-packages/django/db/backends/mysql$ vim operations.py

找到

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

换成

query = errors='replace'

保存退出后再次运行项目问题就解决了

原文链接：https://blog.csdn.net/weixin_49509128/article/details/111570928