django项目从python2.7升级为python3.6踩坑

问题一 reload(sys)报错

解决方法：

import importlib
importlib.reload(sys)

问题二 django-simple-serializer库安装失败

下载django-simple-serializer-2.0.7.tar.gz，解压后，修改setup.py文件：

import importlib
importlib.reload(sys)
LONG_DESCRIPTION =open('README.rst','r', encoding='UTF-8').read()

运行python setup.py install，成功。

问题三 数据库报错django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.

注释掉检测数据库版本的代码（packages/django/db/backends/mysql/base.py", line 36, in <module>）：

# if version < (1, 3, 13):
#     raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)

问题四 运行报错AttributeError: 'str' object has no attribute 'decode'

解决办法：打开"\lib\site-packages\django\db\backends\mysql\operations.py"文件把146行的decode修改为encode即可。

 if query is not None:
     query = query.decode(errors='replace')

问题五 django-simple-serializer库，使用报错'AutoField' object has no attribute 'rel'

pro_id_name = serializer(projects, include_attr=("id", "name", "project_abbr", "latest_ver"))
问题起因：在django1.9及之后版本，autoField字段类型使用remote_field而不是ref，需要做一下兼容。
解决方法：https://github.com/bluedazzle/django-simple-serializer/issues/8
修改django_simple_serializer-2.0.7-py3.6.egg包里的Serializer.py文件，函数data_inspect里增加判断：

for field in concrete_model._meta.local_fields:
                # 检查 field 是否存在 rel 这个属性，为'AutoField' object has no attribute 'rel'错误填坑
                if hasattr(field, 'rel'):
                    if field.rel is None:
                        if self.check_attr(field.name) and hasattr(data, field.name):
                            obj_dict[field.name] = self.data_inspect(getattr(data, field.name))
                    else:
                        if self.check_attr(field.name) and self.foreign:
                            obj_dict[field.name] = self.data_inspect(getattr(data, field.name))
                else:
                    if self.check_attr(field.name) and hasattr(data, field.name):
                        obj_dict[field.name] = self.data_inspect(getattr(data, field.name))