python - 如何在 Heroku 上启动你已经制作好的 Django 应用程序

Question

我已经制作了一个在我的服务器上运行的 Django 应用程序。我现在想使用 heroku 在网络上启动它，但我找到的所有教程都会让你开始一个全新的项目。我不知道该怎么做才能简单地更新我现有的 django 项目以使用 heroku。

我的文件现在是这样组织的:

in hcp:
       crunchWeb:
                 crunchWeb: files = _init_.py ; settings.py ; urls.py ; wsgi.py
                 crunchApp: files = _init_.py ; admin.py ; models.py ; views.py etc...
                 manage.py
                 sqlite3.db

       env: folders= bin ; helloflask ; include ; lib #all of these were created automatically 
       templates:  all my .html files

我想知道 heroku 教程 (https://devcenter.heroku.com/articles/django#using-a-different-wsgi-server) 中的哪些命令我仍然需要执行，哪些我可以跳过.

我还想知道在执行所有命令时我需要在哪个文件夹中

谢谢!

2012-09-06T21:44:52+00:00 app[web.1]:   File "/app/.heroku/venv/lib/python2.7/site-packages/django/db/__init__.py", line 34, in __getattr__
2012-09-06T21:44:52+00:00 app[web.1]:   File "/app/.heroku/venv/lib/python2.7/site-packages/django/db/utils.py", line 92, in __getitem__
2012-09-06T21:44:52+00:00 app[web.1]:     return getattr(connections[DEFAULT_DB_ALIAS], item)
2012-09-06T21:44:52+00:00 app[web.1]:     backend = load_backend(db['ENGINE'])
2012-09-06T21:44:52+00:00 app[web.1]:   File "/app/.heroku/venv/lib/python2.7/site-packages/django/db/utils.py", line 24, in load_backend
2012-09-06T21:44:52+00:00 app[web.1]:     return import_module('.base', backend_name)
2012-09-06T21:44:52+00:00 app[web.1]:   File "/app/.heroku/venv/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
2012-09-06T21:44:52+00:00 app[web.1]:     __import__(name)
2012-09-06T21:44:52+00:00 app[web.1]:   File "/app/.heroku/venv/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 31, in <module>
2012-09-06T21:44:52+00:00 app[web.1]:     raise ImproperlyConfigured("Error loading either pysqlite2 or sqlite3 modules (tried in that order): %s" % exc)
2012-09-06T21:44:52+00:00 app[web.1]: django.core.exceptions.ImproperlyConfigured: Error loading either pysqlite2 or sqlite3 modules (tried in that order): No module named _sqlite3
2012-09-06T21:44:54+00:00 heroku[web.1]: Process exited with status 1
2012-09-06T21:44:54+00:00 heroku[web.1]: State changed from starting to crashed
2012-09-06T21:44:54+00:00 heroku[web.1]: State changed from crashed to starting
2012-09-06T21:44:58+00:00 heroku[web.1]: Starting process with command `python ./manage.py runserver 0.0.0.0:57395 --noreload`
2012-09-06T21:44:59+00:00 app[web.1]:   File "./manage.py", line 10, in <module>

设置.py

 # Django settings for crunchWeb project.
import dj_database_url

DEBUG = True
TEMPLATE_DEBUG = DEBUG

ADMINS = (
# ('Your Name', 'your_email@example.com'),
)

MANAGERS = ADMINS

DATABASES = {'default': dj_database_url.config(default='postgres://localhost')}

# {
#     'default': {
#         'ENGINE': 'django.db.backends.sqlite3', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
#         'NAME': '/Users/Santi/hcp/crunchWeb/sqlite3.db',                      # Or path to database file if using sqlite3.
#         'USER': '',                      # Not used with sqlite3.
#         'PASSWORD': '',                  # Not used with sqlite3.
#         'HOST': '',                      # Set to empty string for localhost. Not used with sqlite3.
#         'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
#     }
# }

Answer 1

直接从方向 https://devcenter.heroku.com/articles/django ，如果您再次阅读说明并按照说明进行操作，您将执行:

$pip install Django psycopg2 dj-database-url

数据库设置

接下来，配置应用程序以使用 Heroku 的 Postgres 数据库。安装的 dj-database-url 模块将从 env 自动执行所有操作。

将以下内容添加到您的 settings.py 中:

import dj_database_url
DATABASES = {'default': dj_database_url.config(default='postgres://localhost')}

您可以在 settings.py 的末尾添加这些行以继续在本地使用 sql lite 并仅在 heroku 上使用 postgres。

settings.py
------------------------
import dj_database_url
import os
if os.getcwd() == "/app":
    DATABASES = {'default': dj_database_url.config(default='postgres://localhost')}