报错(SQLite 3.8.3 or later is required (found 3.7.17).)的解决办法

在服务器上刚部署完Django项目，python manage.py runserver 0.0.0.0:8000启动启动的时候报错：django.core.exceptions.ImproperlyConfigured: SQLite 3.8.3 or later is required (found 3.7.17).，以下为报错展示及解决办法。

一、报错演示

(venv) [root@localhost celery]# python manage.py  runserver 0.0.0.0:8000
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "/usr/local/python3/lib/python3.6/threading.py", line 916, in _bootstrap_inner
    self.run()
  File "/usr/local/python3/lib/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/home/celery/venv/lib/python3.6/site-packages/django/utils/autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "/home/celery/venv/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run
    autoreload.raise_last_exception()
  File "/home/celery/venv/lib/python3.6/site-packages/django/utils/autoreload.py", line 76, in raise_last_exception
    raise _exception[1]
  File "/home/celery/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 357, in execute
    autoreload.check_errors(django.setup)()
  File "/home/celery/venv/lib/python3.6/site-packages/django/utils/autoreload.py", line 53, in wrapper
    fn(*args, **kwargs)
  File "/home/celery/venv/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/celery/venv/lib/python3.6/site-packages/django/apps/registry.py", line 114, in populate
    app_config.import_models()
  File "/home/celery/venv/lib/python3.6/site-packages/django/apps/config.py", line 211, in import_models
    self.models_module = import_module(models_module_name)
  File "/home/celery/venv/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "", line 994, in _gcd_import
  File "", line 971, in _find_and_load
  File "", line 955, in _find_and_load_unlocked
  File "", line 665, in _load_unlocked
  File "", line 678, in exec_module
  File "", line 219, in _call_with_frames_removed
  File "/home/celery/venv/lib/python3.6/site-packages/django/contrib/auth/models.py", line 2, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "/home/celery/venv/lib/python3.6/site-packages/django/contrib/auth/base_user.py", line 47, in <module>
    class AbstractBaseUser(models.Model):
  File "/home/celery/venv/lib/python3.6/site-packages/django/db/models/base.py", line 121, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "/home/celery/venv/lib/python3.6/site-packages/django/db/models/base.py", line 325, in add_to_class
    value.contribute_to_class(cls, name)
  File "/home/celery/venv/lib/python3.6/site-packages/django/db/models/options.py", line 208, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "/home/celery/venv/lib/python3.6/site-packages/django/db/__init__.py", line 28, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/home/celery/venv/lib/python3.6/site-packages/django/db/utils.py", line 207, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "/home/celery/venv/lib/python3.6/site-packages/django/db/utils.py", line 111, in load_backend
    return import_module('%s.base' % backend_name)
  File "/home/celery/venv/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/home/celery/venv/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 68, in <module>
    check_sqlite_version()
  File "/home/celery/venv/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 65, in check_sqlite_version
    raise ImproperlyConfigured('SQLite 3.8.3 or later is required (found %s).' % Database.sqlite_version)
django.core.exceptions.ImproperlyConfigured: SQLite 3.8.3 or later is required (found 3.7.17).

二、问题解决

1. 按照习惯，翻译一下报错信息
   
   大致意思是：Django需要SQLite 3.8.3或更高版本，而现在的版本为3.7.17

2. 两个解决办法
   方法一：给Django降级

   如果是生产环境或者项目规定了Django版本，那么降级Django会引起一系列的问题，本人建议使用方法二，慎重慎重，当然测试环境就无所谓了。

   卸载Django

   pip uninstall django
   

   安装低版本，版本号根据自身项目选择合适的

   pip install django==2.1.7
   

   方法二：升级SQLite
   (1)获取安装包下载链接
   下载地址：https://www.sqlite.org/download.html
   

   最好重新获取一下下载链接，否则可能不是最新版（以上截图为本人写此篇文章时候的最新版）

   (2)wget下载

   #链接最好重新获取，否则可能不是最新版本
   wget https://www.sqlite.org/2019/sqlite-autoconf-3300100.tar.gz
   

   (3)解压并安装

   [root@localhost home]# tar zxvf sqlite-autoconf-3300100.tar.gz
   [root@localhost home]# cd sqlite-autoconf-3300100/
   [root@localhost sqlite-autoconf-3300100]# ./configure
   [root@localhost sqlite-autoconf-3300100]# make & make install
   

   (4)查看版本

   #检查新安装的sqlite3版本
   [root@localhost home]# /usr/local/bin/sqlite3 --version
   3.30.1 2019-10-10 20:19:45 18db032d058f1436ce3dea84081f4ee5a0f2259ad97301d43c426bc7f3df1b0b
   
   #检查旧的sqlite3版本
   [root@localhost home]# /usr/bin/sqlite3 --version
   3.7.17 2013-05-20 00:56:22 118a3b35693b134d56ebd780123b7fd6f1497668
   
   # 把旧的sqlite3改个名字
   [root@localhost home]# mv /usr/bin/sqlite3  /usr/bin/sqlite3_old
   
   # 设置软链接
   [root@localhost home]# ln -s /usr/local/bin/sqlite3 /usr/bin/sqlite3
   
   #查看sqlite3版本
   [root@localhost home]# sqlite3 --version
   3.30.1 2019-10-10 20:19:45 18db032d058f1436ce3dea84081f4ee5a0f2259ad97301d43c426bc7f3df1b0b
   

   (5)设置开机自启动

   # 设置开机自启动
   [root@localhost home]# export LD_LIBRARY_PATH="/usr/local/lib"
   

   (6)检查Python的SQLite3版本

   [root@localhost home]# python3
   Python 3.6.5 (default, Jul  9 2019, 20:03:55) 
   [GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux
   Type "help", "copyright", "credits" or "license" for more information.
   >>> import sqlite3
   >>> sqlite3.sqlite_version
   '3.30.1'
   >>> exit()  
   [root@localhost home]# 
   

   (7)完成

如果你使用虚拟环境启动的项目，可能还会继续报错，需要把虚拟环境删除，重新创建即可
友情提示：可以先生成依赖文件，然后一会批量导入。
可能用到的命令：

1. 依赖文件生成：pip freeze > requirements.txt
2. 依赖文件安装：pip install -r requirements.txt
3. 创建虚拟环境(不指定Python版本，Centos7默认会使用2.7)：virtualenv name
4. 创建虚拟环境(指定Python版本)：virtualenv -p /usr/bin/python3 name

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