修改 我认为这可能与to the comments posted here
有关我还要补充一点，因为我为Ipython安装了anaconda，并且据说那些不能在一起玩得很好，所以我没有把它推到一个虚拟环境中......这是问题的另一个可能根源
我试图部署一个在本地和工头上运行良好的烧瓶应用，但在heroku上部署时会出现500错误。它连接到我的数据库并打印我告诉它的任何内容，直到我的初始方法中的render_template。
这是我的堆栈跟踪。
Traceback (most recent call last):
response = self.full_dispatch_request()
reraise(exc_type, exc_value, tb)
File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.handle_user_exception(e)
reraise(exc_type, exc_value, tb)
context, ctx.app)
File "/app/.heroku/python/lib/python2.7/site-packages/flask/templating.py", line 128, in render_template
File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
return render_template('/index.html')
File "/app/.heroku/python/lib/python2.7/site-packages/jinja2/environment.py", line 742, in handle_exception
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/bundle.py", line 685, in urls
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/ext/jinja2.py", line 181, in _render_assets
File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
File "/app/.heroku/python/lib/python2.7/site-packages/jinja2/environment.py", line 969, in render
urls = bundle.urls(env=env)
File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
File "/app/templates/index.html", line 10, in top-level template code
reraise(exc_type, exc_value, tb)
rv = template.render(context)
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/bundle.py", line 504, in _build
force, disable_cache=disable_cache, extra_filters=extra_filters)
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/merge.py", line 219, in _wrap_cache
File "/app/.heroku/python/lib/python2.7/site-packages/flask/templating.py", line 110, in _render
getattr(filter, type)(data, out, **kwargs_final)
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/bundle.py", line 429, in _merge_and_apply
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/merge.py", line 272, in apply
File "/app/.heroku/python/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/filter/sass.py", line 122, in _apply_sass
return self.environment.handle_exception(exc_info, True)
rv = self.dispatch_request()
errread, errwrite)
File "/app/.heroku/python/lib/python2.7/subprocess.py", line 1327, in _execute_child
kwargs=item_data)
*args, **kwargs)
File "/app/.heroku/python/lib/python2.7/subprocess.py", line 710, in __init__
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/bundle.py", line 647, in _urls
return self._wrap_cache(key, func)
raise child_exception
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/filter/sass.py", line 141, in input
self._apply_sass(_in, out, os.path.dirname(source_path))
return self.view_functions[rule.endpoint](**req.view_args)
content = func().getvalue()
File "/app/.heroku/python/lib/python2.7/site-packages/webassets/merge.py", line 252, in func
File "/app/app.py", line 110, in index
shell=(os.name == 'nt'))
OSError: [Errno 2] No such file or direct
它连接到db fine并进入index方法，但在渲染模板上失败....
这是我的代码：
import os
from urlparse import urlparse
import unicodedata
import time
from datetime import datetime, date
from bs4 import BeautifulSoup
from urllib2 import urlopen
from ast import literal_eval
from flask import Flask, jsonify, render_template, request
from flask.ext import assets
# from flask.ext.pymongo
import pymongo
app = Flask(__name__)
app.debug = True
app.config['MONGO_USERNAME'] = 'email'
app.config['MONGO_PASSWORD'] = 'password'
app.config['MONGO_DBNAME'] = 'app22343276'
MONGO_URL = os.environ.get('MONGOHQ_URL')
if MONGO_URL:
# Get a connection
mongo = pymongo.Connection(MONGO_URL)
# Get the database
db = mongo[urlparse(MONGO_URL).path[1:]]
else:
# Not on an app with the MongoHQ add-on, do some localhost action
mongo = pymongo.Connection('localhost', 27017)
# mongo = pymongo(app)
db = mongo['mongoData']
env = assets.Environment(app)
# print "past mongo"
# Tell flask-assets where to look for our coffeescript and sass files.
env.load_path = [
os.path.join(os.path.dirname(__file__), 'bootstrap/css'),
os.path.join(os.path.dirname(__file__), 'sass'),
os.path.join(os.path.dirname(__file__), 'coffee'),
os.path.join(os.path.dirname(__file__), 'bower_components'),
]
env.register(
'js_all',
assets.Bundle(
'jquery/dist/jquery.min.js',
'bootstrap.min.js',
'd3.min.js',
'dc.js',
'crossfilter.js',
'colorbrewer.js',
assets.Bundle(
'all.coffee',
'chartFunctions.coffee',
'helpers.coffee',
'listeners.coffee',
'dashboardClass.coffee',
'chartClass.coffee',
#'three.coffee',
#'map.coffee',
#'all.coffee',
filters=['coffeescript']
),
output='js_all.js'
)
)
env.register(
'css_all',
assets.Bundle(
'all.sass',
filters=['sass','scss'],
output='css_all.css'
)
)
print "right before app.route"
# print os.environ.get(__name__)
@app.route("/")
def index():
print db
print "in index"
print os.getcwd()
return render_template('/index.html')
我的文件结构是扁平的：
app/
--app.y
--requirements.txt
--Procfile
---static/
---templates/
我的requirements.txt包含在其中：
Flask==0.10.1
Flask-Assets==0.9
Jinja2==2.7.2
Werkzeug==0.9.4
beautifulsoup4==4.3.1
html5lib==0.999
pymongo==2.7.1
python-dateutil==1.5
有点奇怪的是，我没有找到关于找不到模板的错误信息...这是一个关于找不到文件的错误......任何想法？