如何在Heroku上启动你已经制作的Django App

时间:2012-09-06 20:40:35

标签: python django heroku

我已经制作了一个在我的服务器上运行的django应用程序。我现在想要使用heroku在网上启动它,但是我找到的所有教程都会让你开始一个全新的项目。我不知道如何更新我已经存在的django项目以使用heroku。

现在我的文件组织如下:

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)中的哪些命令我还需要做什么以及我可以跳过哪些命令

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>

settings.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.
#     }
# }

2 个答案:

答案 0 :(得分:3)

直接从方向https://devcenter.heroku.com/articles/django,如果您阅读指示并按照指示再次执行,则会再次执行:

$pip install Django psycopg2 dj-database-url

数据库设置

接下来,将应用程序配置为使用Heroku的Postgres数据库。已安装的dj-database-url模块将自动从环境中执行所有操作。

将以下内容添加到settings.py:

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,并且只在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')}

答案 1 :(得分:0)

您链接的heroku/django deployment tutorial仍然是您最好的选择。我刚刚通过该教程部署了现有的应用程序,并跳过了我已经完成的步骤,例如:

virtualenv venv --distribute
django-admin.py startapp...
manage.py syncdb...
git init

基本上,如果您已经为现有的应用程序干了!

我在上面的文件夹结构中没有看到requirements.txt,所以请确保

pip freeze > requirements.txt 

为了减少破坏我现有代码的可能性,我做了以下

# create a branch for testing heroku
git checkout -b heroku_test

#... follow the heroku tutorial

# add my changes
git add .
git commit -m "Heroku deployment steps"

# add the heroku remote
git remote add heroku [address]
git push heroku heroku_test:master

推送语句heroku_test:master的最后一部分允许您将本地分支heroku_test推送到远程分支master。 (否则heroku将忽略提交,因为它不在主分支上)。