Python KeyError:<；类型="；str>；在Django进行迁移时

我创建了一个模型并尝试迁移它，它抛出了错误

from __future__ import unicode_literals
from django.utils import timezone
from django.db import models

# Create your models here.
class Post(models.Model):
    title = models.CharField(max_length = 200)
    body = models.TextField()
    created_at = models.DateTimeField(default=timezone.now, blank = True)

这是我在创建模型后遇到的错误。 我使用的是mysql而不是sqlite3

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/makemigrations.py", line 110, in handle
    loader.check_consistent_history(connection)
  File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/loader.py", line 283, in check_consistent_history
    applied = recorder.applied_migrations()
  File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/recorder.py", line 65, in applied_migrations
    self.ensure_schema()
  File "/usr/local/lib/python2.7/dist-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 "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/base.py", line 254, in cursor
    return self._cursor()
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/base.py", line 229, in _cursor
    self.ensure_connection()
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/base.py", line 213, in ensure_connection
    self.connect()
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/base.py", line 189, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 276, in get_new_connection
    conn.encoders[SafeBytes] = conn.encoders[bytes]
KeyError: <type 'str'>

我也有同样的问题

执行此“pip列表”并检查您安装的mysqlclient的版本。 如果>=1.4；请改为这样做。“pip安装mysqlclient==1.3.14”

---

我就是这样做的。显然1.4出现了一些问题

请向我们展示您的

数据库

设置-问题似乎与您的数据库配置有关，而不是与此特定迁移有关。mysqlclient是否已修复此问题？我已经降级到1.3.14，这似乎是目前唯一的解决方案。有人能解决这个问题吗？没有。对我来说还没有解决。这只是在遗留项目中使用python2时的一个问题。最新版本无法生成，旧版本有问题…1.3.14是最好的选择！

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'djangoproject',
        'USER': 'root',
        'PASSWORD': '',
        'HOST': '127.0.0.1',
    }
}