Sqlalchemy.exc.OperationalError:(psycopg2.OperationalError) [英] Sqlalchemy.exc.OperationalError: (psycopg2.OperationalError)

问题描述

我的Flask应用程序(postgresql db)在本地运行良好.我将代码推送到服务器，然后尝试 py.db迁移，这会引发这些错误

My Flask app(postgresql db) is working fine in local. I pushed my code to server and there I tried to run.py db migrate, it throws me these errors

Traceback (most recent call last):
  File "run.py", line 11, in <module>
    create_app().run()
  File "/usr/local/lib/python2.7/dist-packages/flask_script/__init__.py", line 412, in run
    result = self.handle(sys.argv[0], sys.argv[1:])
  File "/usr/local/lib/python2.7/dist-packages/flask_script/__init__.py", line 383, in handle
    res = handle(*args, **config)
  File "/usr/local/lib/python2.7/dist-packages/flask_script/commands.py", line 216, in __call__
    return self.run(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/flask_migrate/__init__.py", line 239, in upgrade
    command.upgrade(config, revision, sql=sql, tag=tag)
  File "/usr/local/lib/python2.7/dist-packages/alembic/command.py", line 174, in upgrade
    script.run_env()
  File "/usr/local/lib/python2.7/dist-packages/alembic/script/base.py", line 407, in run_env
    util.load_python_file(self.dir, 'env.py')
  File "/usr/local/lib/python2.7/dist-packages/alembic/util/pyfiles.py", line 93, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/local/lib/python2.7/dist-packages/alembic/util/compat.py", line 79, in load_module_py
    mod = imp.load_source(module_id, path, fp)
  File "migrations/env.py", line 87, in <module>
    run_migrations_online()
  File "migrations/env.py", line 72, in run_migrations_online
    connection = engine.connect()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2018, in connect
    return self._connection_cls(self, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 72, in __init__
    if connection is not None else engine.raw_connection()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2104, in raw_connection
    self.pool.unique_connection, _connection)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2078, in _wrap_pool_connect
    e, dialect, self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1405, in _handle_dbapi_exception_noconnection
    exc_info
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/compat.py", line 199, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2074, in _wrap_pool_connect
    return fn()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 318, in unique_connection
    return _ConnectionFairy._checkout(self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 713, in _checkout
    fairy = _ConnectionRecord.checkout(pool)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 480, in checkout
    rec = pool._do_get()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 1151, in _do_get
    return self._create_connection()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 323, in _create_connection
    return _ConnectionRecord(self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 449, in __init__
    self.connection = self.__connect()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 607, in __connect
    connection = self.__pool._invoke_creator(self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/strategies.py", line 97, in connect
    return dialect.connect(*cargs, **cparams)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 385, in connect
    return self.dbapi.connect(*cargs, **cparams)
  File "/usr/local/lib/python2.7/dist-packages/psycopg2/__init__.py", line 164, in connect
    conn = _connect(dsn, connection_factory=connection_factory, async=async)
sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) FATAL:  parameter "listen_addresses" cannot be changed without restarting the server

run.py db init 正常运行，并成功在服务器中创建了migrations文件夹.任何帮助将不胜感激

run.py db init worked fine and successfully created the migrations folder in the server. Any Help would be highly appreciated

我的主要应用代码

app = Flask(__name__)
app.config.from_object('config')

rest_api = Api(app)

db = SQLAlchemy(app)

bcrypt = Bcrypt(app)

from app import routes

Compress(app)
assets = Environment(app)
define_assets(assets)
cache = Cache(app,config={'CACHE_TYPE': 'simple'})

migrate = Migrate(app, db)

manager = Manager(app)
manager.add_command('db', MigrateCommand)

和 run.py 代码

from flask_failsafe import failsafe


@failsafe
def create_app():
    from app import manager
    return manager

from app import app
if __name__ == '__main__':
    create_app().run()

推荐答案

使用"sudo"修复它.

Fixed it with a `sudo.

sudo run.py db migrate

我知道这很奇怪，但是，sudo可以解决问题

I know it is weird but yes, sudo did the trick

这篇关于Sqlalchemy.exc.OperationalError:(psycopg2.OperationalError)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IT屋！