本文介绍了Heroku-无法连接到本地MySQL服务器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经部署了包含以下内容的项目
I have deployed my project containing
- Django
- 其他框架
- Reactjs
使用Heroku "rel =" nofollow noreferrer >此中等帖子作为参考.现在，我将代码保存在deploy-heroku分支中，所以我这样做了:
to Heroku using this medium post as reference. Now, I have my code in deploy-heroku branch so I did:
git push heroku deploy-heroku:master
现在，构建成功，但是部署失败.
Now, the build was successful but the deployment got failed.
这是追溯
Traceback (most recent call last):
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
self.connect()
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 194, in connect
self.connection = self.get_new_connection(conn_params)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 236, in get_new_connection
return Database.connect(**conn_params)
File "/app/.heroku/python/lib/python3.6/site-packages/MySQLdb/__init__.py", line 86, in Connect
return Connection(*args, **kwargs)
File "/app/.heroku/python/lib/python3.6/site-packages/MySQLdb/connections.py", line 204, in __init__
super(Connection, self).__init__(*args, **kwargs2)
_mysql_exceptions.OperationalError: (2002, "Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)")
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
utility.execute()
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/__init__.py", line 365, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **cmd_options)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py", line 332, in execute
self.check()
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/base.py", line 364, in check
include_deployment_checks=include_deployment_checks,
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 57, in _run_checks
issues = run_checks(tags=[Tags.database])
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/checks/registry.py", line 73, in run_checks
new_errors = check(app_configs=app_configs)
File "/app/.heroku/python/lib/python3.6/site-packages/django/core/checks/database.py", line 10, in check_database_backends
issues.extend(conn.validation.check(**kwargs))
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/mysql/validation.py", line 9, in check
issues.extend(self._check_sql_mode(**kwargs))
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/mysql/validation.py", line 13, in _check_sql_mode
with self.connection.cursor() as cursor:
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 255, in cursor
return self._cursor()
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 232, in _cursor
self.ensure_connection()
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
self.connect()
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
self.connect()
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 194, in connect
self.connection = self.get_new_connection(conn_params)
File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 236, in get_new_connection
return Database.connect(**conn_params)
File "/app/.heroku/python/lib/python3.6/site-packages/MySQLdb/__init__.py", line 86, in Connect
return Connection(*args, **kwargs)
File "/app/.heroku/python/lib/python3.6/site-packages/MySQLdb/connections.py", line 204, in __init__
super(Connection, self).__init__(*args, **kwargs2)
django.db.utils.OperationalError: (2002, "Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)")
在哪里更改数据库配置.我以为heroku会自动做到这一点！
Where do that change that database configurations. I thought that heroku would automatically do this!
settings.py
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'redditdb',
'HOST': 'localhost',
'USER':'root',
'PASSWORD': 'root'
}
}
推荐答案
这些是您必须进行的更改，才能在heroku上使用postgres.
These are the changes you have to make in order to use postgres on heroku.
您必须安装两个python软件包
You have to install two python packages
pip install psycopg2 # postgres adapter for python
pip install dj_database_url
记住要在您的requirements.txt
pip freeze > requirements.txt
最后在 settings.py 中，import dj_database_url并按如下所示更新DATABASES设置
Finally in your settings.py, import dj_database_url and update your DATABASES settings as follows
db_from_env = dj_database_url.config(conn_max_age=500)
DATABASES['default'].update(db_from_env)
现在将您的应用程序部署到heroku. Heroku将自动为您添加一个postgresql插件.
Now deploy your app to heroku. Heroku will automatically add a postgresql addon for you.
这篇关于Heroku-无法连接到本地MySQL服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！