使用 production.ini 托管的金字塔应用程序时出现服务器错误答案

【问题标题】：Server error when pyramid app hosted with production.ini使用 production.ini 托管的金字塔应用程序时出现服务器错误
【发布时间】：2014-07-15 09:35:12
【问题描述】：

我有一个金字塔项目，在使用 development.ini 托管时可以正常工作，但是一旦我使用 production.ini，我就会在浏览器中收到此错误：

Internal Server Error
The server encountered an unexpected internal server error
(generated by waitress)

这个登录终端：

Starting subprocess with file monitor
Starting server in PID 5912.
serving on http://0.0.0.0:6543
2014-05-26 16:54:23,139 ERROR [waitress][Dummy-2] Exception when serving /
Traceback (most recent call last):
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/waitress-0.8.9-py2.7.egg/waitress/channel.py", line 337, in service
    task.service()
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/waitress-0.8.9-py2.7.egg/waitress/task.py", line 173, in service
    self.execute()
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/waitress-0.8.9-py2.7.egg/waitress/task.py", line 392, in execute
    app_iter = self.channel.server.application(env, start_response)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/router.py", line 242, in __call__
    response = self.invoke_subrequest(request, use_tweens=True)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/router.py", line 217, in invoke_subrequest
    response = handle_request(request)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/tweens.py", line 21, in excview_tween
    response = handler(request)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid_tm-0.7-py2.7.egg/pyramid_tm/__init__.py", line 82, in tm_tween
    reraise(*exc_info)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid_tm-0.7-py2.7.egg/pyramid_tm/__init__.py", line 63, in tm_tween
    response = handler(request)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/router.py", line 163, in handle_request
    response = view_callable(context, request)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/config/views.py", line 377, in rendered_view
    context)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/renderers.py", line 418, in render_view
    return self.render_to_response(response, system, request=request)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/renderers.py", line 441, in render_to_response
    result = self.render(value, system_values, request=request)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/renderers.py", line 421, in render
    renderer = self.renderer
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/decorator.py", line 37, in __get__
    val = self.wrapped(inst)
  File "/home/roman/Critical_ID/CCG_Map/local/lib/python2.7/site-packages/pyramid/renderers.py", line 404, in renderer
    'No such renderer factory %s' % str(self.type))
ValueError: No such renderer factory .mak

我在 .ini 文件的 [app:main] 部分下复制了我的 sqlalchemy.url 和 mako.directories，但我看不出是什么导致了这个错误。

我使用以下命令启动服务器：../bin/pserve/production.ini --reload

我错过了什么？

【问题讨论】：

标签： python pyramid production waitress

【解决方案1】：

这是因为最新版本的 Pyramid 默认不需要/安装 Mako 的模板引擎。要修复此错误，如 HERE 所述，您必须做两件事：

确保已安装 pyramid_mako 软件包。一种方法是将“pyramid_mako”添加到包的setup.py 文件的install_requires 部分，然后重新运行setup.py develop：
```
setup(
    #...
    install_requires=[
        'pyramid_mako',         # new dependency
        'pyramid',
        #...
    ],
)
```
在您的应用程序中实例化 Pyramid 配置器的部分（通常是项目的 __init__.py 文件中的 main() 函数），告诉 Pyramid 包含 pyramid_mako 包含我：
```
config = Configurator(.....)
config.include('pyramid_mako')
```

【讨论】：