由于某种原因，我的Flask应用在我的本地计算机上运行良好，但是当部署到heroku时，我收到渲染模板错误。
procfile：网站：gunicorn app：app
基本文件结构：
2019-03-20T16:42:53.000000+00:00 app[api]: Build succeeded
2019-03-20T16:42:58.002302+00:00 heroku[router]: at=info method=GET path="/" host=headphones.herokuapp.com request_id=856e996e-9716-4688-8474-49e1102938ae fwd="96.35.158.2" dyno=web.1 connect=1ms service=6ms status=500 bytes=455 protocol=https
2019-03-20T16:42:57.999048+00:00 app[web.1]: [2019-03-20 16:42:57,996] ERROR in app: Exception on / [GET]
2019-03-20T16:42:57.999062+00:00 app[web.1]: Traceback (most recent call last):
2019-03-20T16:42:57.999064+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/app.py", line 2292, in wsgi_app
2019-03-20T16:42:57.999065+00:00 app[web.1]: response = self.full_dispatch_request()
2019-03-20T16:42:57.999069+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/app.py", line 1815, in full_dispatch_request
2019-03-20T16:42:57.999071+00:00 app[web.1]: rv = self.handle_user_exception(e)
2019-03-20T16:42:57.999073+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/app.py", line 1718, in handle_user_exception
2019-03-20T16:42:57.999074+00:00 app[web.1]: reraise(exc_type, exc_value, tb)
2019-03-20T16:42:57.999076+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/_compat.py", line 35, in reraise
2019-03-20T16:42:57.999082+00:00 app[web.1]: raise value
2019-03-20T16:42:57.999084+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/app.py", line 1813, in full_dispatch_request
2019-03-20T16:42:57.999086+00:00 app[web.1]: rv = self.dispatch_request()
2019-03-20T16:42:57.999088+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/app.py", line 1799, in dispatch_request
2019-03-20T16:42:57.999089+00:00 app[web.1]: return self.view_functions[rule.endpoint](**req.view_args)
2019-03-20T16:42:57.999091+00:00 app[web.1]: File "/app/app.py", line 55, in home
2019-03-20T16:42:57.999092+00:00 app[web.1]: return render_template("index.html")
2019-03-20T16:42:57.999094+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/templating.py", line 134, in render_template
2019-03-20T16:42:57.999096+00:00 app[web.1]: return _render(ctx.app.jinja_env.get_or_select_template(template_name_or_list),
2019-03-20T16:42:57.999097+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/jinja2/environment.py", line 869, in get_or_select_template
2019-03-20T16:42:57.999099+00:00 app[web.1]: return self.get_template(template_name_or_list, parent, globals)
2019-03-20T16:42:57.999101+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/jinja2/environment.py", line 830, in get_template
2019-03-20T16:42:57.999102+00:00 app[web.1]: return self._load_template(name, self.make_globals(globals))
2019-03-20T16:42:57.999104+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/jinja2/environment.py", line 804, in _load_template
2019-03-20T16:42:57.999105+00:00 app[web.1]: template = self.loader.load(self, name, globals)
2019-03-20T16:42:57.999107+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/jinja2/loaders.py", line 113, in load
2019-03-20T16:42:57.999108+00:00 app[web.1]: source, filename, uptodate = self.get_source(environment, name)
2019-03-20T16:42:57.999110+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/templating.py", line 58, in get_source
2019-03-20T16:42:57.999111+00:00 app[web.1]: return self._get_source_fast(environment, template)
2019-03-20T16:42:57.999113+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/flask/templating.py", line 86, in _get_source_fast
2019-03-20T16:42:57.999114+00:00 app[web.1]: raise TemplateNotFound(template)
2019-03-20T16:42:57.999120+00:00 app[web.1]: jinja2.exceptions.TemplateNotFound: index.html
2019-03-20T16:42:58.000010+00:00 app[web.1]: 10.69.213.200 - - [20/Mar/2019:16:42:57 +0000] "GET / HTTP/1.1" 500 290 "https://dashboard.heroku.com/" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36"
2019-03-20T16:42:58.180976+00:00 app[web.1]: 10.69.213.200 - - [20/Mar/2019:16:42:58 +0000] "GET /favicon.ico HTTP/1.1" 404 232 "https://headphones.herokuapp.com/" "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36"
2019-03-20T16:42:58.183263+00:00 heroku[router]: at=info method=GET path="/favicon.ico" host=headphones.herokuapp.com request_id=3bb6ecd2-778e-499e-b0e6-72913e8c4a08 fwd="96.35.158.2" dyno=web.1 connect=1ms service=4ms status=404 bytes=385 protocol=https
答案 0 :(得分：0)
似乎文件没有全部发送到Heroku。
如果要使用git进行部署，请确保将所有文件都运送到了slug。
在您的位置，我会尝试执行heroku run bash -a name-of-your-app来检查段的内容，并检查所有文件是否都在您期望的位置。
答案 1 :(得分：0)
@elias好吧，我希望我先尝试一下。不知道最终结果是什么，但是我只是在将整个应用程序一部分重新构建时才将其部署到heroku中，因为我添加了部分内容以查看可能是导致问题的原因。不幸的是，我从未做过，但是该应用程序现在可以运行了。
是的，是的，当我尝试整体上载该应用程序时，没有出现任何问题。
谢谢大家给我的第一篇文章提供的帮助！