SQLite 到 PostgreSQL 问题 [wagtail 教程]

Question

这是我第一次将我的 wagtail 应用程序（我为此感到非常自豪 :) ）到 heroku。我正在学习本教程（请参阅下面的 link）： https://wagtail.io/blog/deploying-wagtail-heroku/

但是我在这个教程中遇到了一个麻烦：这是当我将 sqlite 之间的数据库更改为 PostgreSQL.

有问题:

django.db.utils.OperationalError: could not connect to server: No such file or directory


    Is the server running locally and accepting


    connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

我在 mac os 10.13.3。 Python 与 Anaconda。

这就是我所做的:

在 base.py 文件中将默认端口更改为 5433 但它不起作用。（如本教程：https://vix.digital/insights/deploying-wagtail-production/）
试图找到并修改 .conf 文件，但没有找到...

在此之前，没有安装以前的postgresql。我没有任何 postgres 服务器运行（我不知道如何检查它，但我卡在了本教程的第一步...）。

感谢您的帮助！ :)

整个终端响应

    The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "manage.py", line 12, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 83, in handle
    executor = MigrationExecutor(connection, self.migration_progress_callback)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/migrations/executor.py", line 20, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/migrations/loader.py", line 52, in __init__
    self.build_graph()
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/migrations/loader.py", line 209, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 65, in applied_migrations
    self.ensure_schema()
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 52, in ensure_schema
    if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()):
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/backends/base/base.py", line 254, in cursor
    return self._cursor()
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/backends/base/base.py", line 229, in _cursor
    self.ensure_connection()
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
    self.connect()
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
    self.connect()
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/backends/base/base.py", line 189, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 176, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/Users/darkbook/anaconda3/lib/python3.6/site-packages/psycopg2/__init__.py", line 130, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

Answer 1

如果您没有任何 PostgreSQL 服务器运行那么错误消息 "Is the server running locally?" 中的建议非常有用！ :)

由于您使用的是 OS X，我推荐 https://postgresapp.com 作为开始使用 PostgreSQL 的最简单方法。

请注意，虽然有充分的理由在两个地方使用相同的设置，但可以在本地使用 SQLite 开发项目，并在 Heroku 上使用 PostgreSQL。

Answer 2

您需要先创建 Postgres 数据库，然后才能连接到它最简单的方法是使用 Postico：https://eggerapps.at/postico/

在 Postico 中创建数据库（例如数据库名称 "mysite"），然后在您的 base.py 设置中，您会得到如下内容：

DATABASES = {
'default': {
    'ENGINE': 'django.db.backends.postgresql_psycopg2',
    'NAME': 'mysite',
    'USER': '',  # e.g 'postgres'
    'PASSWORD': '',
    'HOST': '',  # Set to empty string for localhost.
    'PORT': '',  # Set to empty string for default.
    'CONN_MAX_AGE': 600,  # number of seconds database connections should persist for
}

}

不要忘记您需要再次运行迁移以构建所有表。所以从 manage.py 开始，你会运行 makemigrations 然后 migrate.

SQLite 到 PostgreSQL 问题 [wagtail 教程]

SQLite to PostgreSQL issue [wagtail tutorial]

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