Question

我正在通过官方文档教程学习django版本1.11.4。我使用python 3.6.5和mysql8作为数据库。我还使用mysql.connector.django连接到mysql数据库。我试着做第一部Django应用程序，第2部分。

一切正常，除非我运行此命令：

Question.objects.all（）

我收到以下错误：

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/query.py", line 226, in __repr__
    data = list(self[:REPR_OUTPUT_SIZE + 1])
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/query.py", line 250, in __iter__
    self._fetch_all()
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/query.py", line 1118, in _fetch_all
    self._result_cache = list(self._iterable_class(self))
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/query.py", line 62, in __iter__
    for row in compiler.results_iter(results):
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 839, in results_iter
    for rows in results:
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1284, in cursor_iter
    sentinel):
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1283, in <lambda>
    for rows in iter((lambda: cursor.fetchmany(GET_ITERATOR_CHUNK_SIZE)),
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/utils.py", line 101, in inner
    return func(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/cursor_cext.py", line 510, in fetchmany
    rows.extend(self._cnx.get_rows(size))
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/connection_cext.py", line 275, in get_rows
    row[i])
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/conversion.py", line 205, in to_python
    return self._cache_field_types[vtype[1]](value, vtype)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/django/base.py", line 119, in _DATETIME_to_python
    dt = MySQLConverter._DATETIME_to_python(self, value)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/mysql/connector/conversion.py", line 506, in _DATETIME_to_python
    (date_, time_) = value.split(b' ')
AttributeError: 'datetime.datetime' object has no attribute 'split'

模型文件中使用的代码：

import datetime

from django.db import models

from django.utils import timezone

class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

    def was_published_recently(self):
        return self.pub_date >= timezone.now() - 
        datetime.timedelta(days=1)

    def __str__(self):
        return self.question_text



class Choice(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

    def __str__(self):
    return self.choice_text

数据库设置：

DATABASES = {
    'default': {
        'NAME': 'mysite',
        'ENGINE': 'mysql.connector.django',
        'USER': 'root',
        'PASSWORD': '********',
        'OPTIONS': {
          'autocommit': True,
        },
    }
}

任何线索或帮助修复此错误将不胜感激。

Answer 1

我昨天或2天前也经历过这种痛苦，并且能够使用mysqlclient-1.3.12运行它。我从记忆中走出来，所以忍受我，我尝试了很多东西，但最终我得到了它的工作。

我正如你所做的那样从mysql网站安装了mysql8和mysql8connector但却没有爱。经过大量的搜索和许多试验和错误后，我找到了一个答案，我找不到回复的路，但我最终做了：

brew install mysql pip install mysqlclient

我知道你已经安装了mysql但是brew install mysql似乎添加了用于编译mysqlclient连接器的客户端库。然后我的设置文件中的数据库如下所示：

DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', 'NAME': 'polls', 'USER': 'myuser', 'PASSWORD': 'password', 'HOST': 'localhost', 'PORT': '3306', 'OPTIONS': { 'charset': 'utf8mb4', 'autocommit': True, }, } }

请注意，ENGINE是不同的。如果我将ENGINE更改为mysql.connector.django，我可以复制您的确切错误。

但是，使用django.db.backends.mysql我仍会收到以下警告：

lib / python3.6 / site-packages / django / db / backends / mysql / base.py:71：警告：（3719，＆＃34;＆＃39; utf8＆＃39;目前是别名字符集UTF8MB3，在将来的版本中将被UTF8MB4取代。请考虑使用UTF8MB4以便明确。＆＃34;

我无法弄清楚，但因为它只是一个警告，Django教程似乎工作正常。

请告诉我这是否有帮助，或者如果您有其他问题，我会尽力帮助您。

Answer 2

我在MacOS上使用MySQL DB使用python3设置我的Django项目几个小时。我无法在使用virtualenv创建的虚拟环境中通过pip3安装mysqlclient和MySQL-Python

错误堆栈跟踪是：something wrong due to configparser in python3

Jans-MacBook-Pro:~ jan$ /Library/Frameworks/Python.framework/Versions/3.3/bin/pip-3.3 install MySQL-python
Downloading/unpacking MySQL-python
Running setup.py egg_info for package MySQL-python
Traceback (most recent call last):
  File "<string>", line 16, in <module>
  File "/var/folders/lf/myf7bjr57_jg7_5c4014bh640000gn/T/pip-build/MySQL-python/setup.py", line 14, in <module>
    from setup_posix import get_config
  File "./setup_posix.py", line 2, in <module>
    from ConfigParser import SafeConfigParser
ImportError: No module named 'ConfigParser'
Complete output from command python setup.py egg_info:
Traceback (most recent call last):

File "<string>", line 16, in <module>

File "/var/folders/lf/myf7bjr57_jg7_5c4014bh640000gn/T/pip-build/MySQL-python/setup.py", line 14, in <module>

from setup_posix import get_config

File "./setup_posix.py", line 2, in <module>

from ConfigParser import SafeConfigParser

ImportError: No module named 'ConfigParser'

----------------------------------------
Command python setup.py egg_info failed with error code 1 in /var/folders/lf/myf7bjr57_jg7_5c4014bh640000gn/T/pip-build/MySQL-python
Storing complete log in /Users/jan/.pip/pip.log
Jans-MacBook-Pro:~ jan$

现在为我工作的 SOLUTION 是

1）再次使用brew安装mysql

brew install mysql

2）使用brew升级mysql到最新版本（如果需要）

brew upgrade mysql

3）现在用pip3安装mysqlclient（在没有virtualenv的情况下全局安装）

pip3 install mysqlclient

4）现在访问virtualenv并在其中安装mysqlclient，它将安装正常，没有任何错误的configparser

Answer 3

从bug report发布的by @Alasdair可以看出，解决方案是：

在use_pure=True中设置DATABASES['default']['OPTIONS']。

Answer 4

这是mysql-connector-python数据转换问题。您可以通过使用use_pure = true设置数据库选项参数来解决此问题。当前版本8.0.11、8.0.12和8.0.13中未解决此问题。

"OPTIONS":{
 "use_pure":True
}

这只是一个临时解决方案。请参阅此处以获取更多信息：https://bugs.mysql.com/bug.php?id=90541

django 1.11.4中的错误（'datetime.datetime'对象没有属性'split'）

4 个答案: