我在 Heroku 上托管了一个 Hacker News 克隆，我克隆了它以进行更改，以便可以按日期和投票计数对投票进行排序。进展顺利，然后我用 rspec 进行了测试，确保我是绿色的。最后，我推送到 Heroku，它也很顺利，没有报告错误。
但是，当我访问该网址时，它显示“我们很抱歉，但出了点问题。”。通常，我会进行故障排除，但部署或 rspec 中没有消息，所以我不确定该怎么做？如果有人遇到过这种情况或可以建议我尝试一些东西，我将不胜感激。这是运行 rspec 和部署后的终端输出：
Finished in 0.60271 seconds
11 examples, 0 failures
Randomized with seed 33033
jasonrodriguez:infinite-castle-2099 jasonrodriguez$ git add . -A
jasonrodriguez:infinite-castle-2099 jasonrodriguez$ git commit -m "verifying that this app is committed"
# On branch master
nothing to commit, working directory clean
jasonrodriguez:infinite-castle-2099 jasonrodriguez$ git push heroku master
Everything up-to-date
jasonrodriguez:infinite-castle-2099 jasonrodriguez$
我通过主分支做到了这一点jasonrodriguez:infinite-castle-2099 jasonrodriguez$ git branch
* master
我跑了heroku logs --tail，它给了我这个：
jasonrodriguez:infinite-castle-2099 jasonrodriguez$ heroku logs --tail
2013-10-19T17:03:32.558564+00:00 app[web.1]: LINE 1: ...8695' AND '2013-10-19 17:03:32.548861') ORDER BY votes_coun...
2013-10-19T17:03:32.558717+00:00 app[web.1]: 10: </thead>
2013-10-19T17:03:32.558717+00:00 app[web.1]: 12: <% Link.most_voted.each do |link| %>
2013-10-19T17:03:32.558717+00:00 app[web.1]: 9: </tr>
2013-10-19T17:03:32.558717+00:00 app[web.1]:
2013-10-19T17:03:33.819411+00:00 heroku[router]: at=info method=GET path=/favicon.ico host=infinite-castle-2099.herokuapp.com fwd="67.170.184.10" dyno=web.1 connect=1ms service=11ms status=200 bytes=0
2013-10-19T17:24:26.167584+00:00 app[web.1]: PG::UndefinedColumn: ERROR: column "votes_count" does not exist
2013-10-19T17:24:26.163272+00:00 app[web.1]: Started GET "/" for 67.170.184.10 at 2013-10-19 17:24:26 +0000
2013-10-19T17:24:26.163272+00:00 app[web.1]: Started GET "/" for 67.170.184.10 at 2013-10-19 17:24:26 +0000
2013-10-19T17:24:26.167584+00:00 app[web.1]: ^
2013-10-19T17:24:26.167584+00:00 app[web.1]: LINE 1: ...4736' AND '2013-10-19 17:24:26.164831') ORDER BY votes_coun...
2013-10-19T17:24:26.167584+00:00 app[web.1]: : SELECT "links".* FROM "links" WHERE ("links"."created_at" BETWEEN '2013-10-12 17:24:26.164736' AND '2013-10-19 17:24:26.164831') ORDER BY votes_count DESC LIMIT 100
2013-10-19T17:24:26.167584+00:00 app[web.1]: : SELECT "links".* FROM "links" WHERE ("links"."created_at" BETWEEN '2013-10-12 17:24:26.164736' AND '2013-10-19 17:24:26.164831') ORDER BY votes_count DESC LIMIT 100
2013-10-19T17:24:26.167584+00:00 app[web.1]: PG::UndefinedColumn: ERROR: column "votes_count" does not exist
2013-10-19T17:24:26.167584+00:00 app[web.1]: ^
2013-10-19T17:24:26.168406+00:00 app[web.1]: Completed 500 Internal Server Error in 4ms
2013-10-19T17:24:26.170324+00:00 app[web.1]:
2013-10-19T17:24:26.170324+00:00 app[web.1]: ActionView::Template::Error (PG::UndefinedColumn: ERROR: column "votes_count" does not exist
2013-10-19T17:24:26.175677+00:00 heroku[router]: at=info method=GET path=/ host=infinite-castle-2099.herokuapp.com fwd="67.170.184.10" dyno=web.1 connect=2ms service=13ms status=500 bytes=1266
2013-10-19T17:24:26.164068+00:00 app[web.1]: Processing by LinksController#index as HTML
2013-10-19T17:24:26.164068+00:00 app[web.1]: Processing by LinksController#index as HTML
2013-10-19T17:24:26.170324+00:00 app[web.1]: 11: <tbody class="stories">
2013-10-19T17:24:26.170324+00:00 app[web.1]: ^
2013-10-19T17:24:26.170324+00:00 app[web.1]: : SELECT "links".* FROM "links" WHERE ("links"."created_at" BETWEEN '2013-10-12 17:24:26.164736' AND '2013-10-19 17:24:26.164831') ORDER BY votes_count DESC LIMIT 100):
2013-10-19T17:24:26.170479+00:00 app[web.1]: 15: <%= f.submit '▲' %>
2013-10-19T17:24:26.170479+00:00 app[web.1]:
2013-10-19T17:24:26.168250+00:00 app[web.1]: Rendered links/index.html.erb within layouts/application (3.6ms)
2013-10-19T17:24:26.170479+00:00 app[web.1]: app/views/links/index.html.erb:12:in `_app_views_links_index_html_erb___4309851234159801657_70037839513200'
2013-10-19T17:24:26.170626+00:00 app[web.1]: 13: <%= form_for link.votes.new do |f| %>
2013-10-19T17:24:26.170324+00:00 app[web.1]: 13: <%= form_for link.votes.new do |f| %>
2013-10-19T17:24:26.170479+00:00 app[web.1]: LINE 1: ...4736' AND '2013-10-19 17:24:26.164831') ORDER BY votes_coun...
2013-10-19T17:24:26.170626+00:00 app[web.1]: 12: <% Link.most_voted.each do |link| %>
2013-10-19T17:24:26.170324+00:00 app[web.1]: 9: </tr>
2013-10-19T17:24:26.170479+00:00 app[web.1]: ^
2013-10-19T17:24:26.170626+00:00 app[web.1]: app/views/links/index.html.erb:12:in `_app_views_links_index_html_erb___4309851234159801657_70037839513200'
2013-10-19T17:24:26.170626+00:00 app[web.1]: 9: </tr>
2013-10-19T17:24:26.170479+00:00 app[web.1]: 14: <%= f.hidden_field :link_id %>
2013-10-19T17:24:26.170626+00:00 app[web.1]: 11: <tbody class="stories">
2013-10-19T17:24:26.170626+00:00 app[web.1]: 10: </thead>
2013-10-19T17:24:26.167584+00:00 app[web.1]: LINE 1: ...4736' AND '2013-10-19 17:24:26.164831') ORDER BY votes_coun...
2013-10-19T17:24:26.168489+00:00 app[web.1]: Completed 500 Internal Server Error in 4ms
2013-10-19T17:24:26.170324+00:00 app[web.1]: LINE 1: ...4736' AND '2013-10-19 17:24:26.164831') ORDER BY votes_coun...
2013-10-19T17:24:26.170479+00:00 app[web.1]:
2013-10-19T17:24:26.170479+00:00 app[web.1]: ActionView::Template::Error (PG::UndefinedColumn: ERROR: column "votes_count" does not exist
2013-10-19T17:24:26.170626+00:00 app[web.1]: 15: <%= f.submit '▲' %>
2013-10-19T17:24:26.168250+00:00 app[web.1]: Rendered links/index.html.erb within layouts/application (3.6ms)
2013-10-19T17:24:26.170324+00:00 app[web.1]: 10: </thead>
2013-10-19T17:24:26.170479+00:00 app[web.1]: : SELECT "links".* FROM "links" WHERE ("links"."created_at" BETWEEN '2013-10-12 17:24:26.164736' AND '2013-10-19 17:24:26.164831') ORDER BY votes_count DESC LIMIT 100):
2013-10-19T17:24:26.170324+00:00 app[web.1]: 12: <% Link.most_voted.each do |link| %>
2013-10-19T17:24:26.170479+00:00 app[web.1]:
2013-10-19T17:24:26.170626+00:00 app[web.1]: 14: <%= f.hidden_field :link_id %>
2013-10-19T17:24:26.170626+00:00 app[web.1]:
2013-10-19T17:24:26.170626+00:00 app[web.1]:
2013-10-19T17:25:15.524381+00:00 app[web.1]: Started GET "/" for 99.90.16.79 at 2013-10-19 17:25:15 +0000
2013-10-19T17:25:15.529687+00:00 app[web.1]: Rendered links/index.html.erb within layouts/application (3.8ms)
2013-10-19T17:25:15.529083+00:00 app[web.1]: : SELECT "links".* FROM "links" WHERE ("links"."created_at" BETWEEN '2013-10-12 17:25:15.525998' AND '2013-10-19 17:25:15.526107') ORDER BY votes_count DESC LIMIT 100
2013-10-19T17:25:15.524381+00:00 app[web.1]: Started GET "/" for 99.90.16.79 at 2013-10-19 17:25:15 +0000
2013-10-19T17:25:15.525289+00:00 app[web.1]: Processing by LinksController#index as HTML
2013-10-19T17:25:15.529083+00:00 app[web.1]: PG::UndefinedColumn: ERROR: column "votes_count" does not exist
2013-10-19T17:25:15.525289+00:00 app[web.1]: Processing by LinksController#index as HTML
2013-10-19T17:25:15.531524+00:00 app[web.1]: ^
2013-10-19T17:25:15.531695+00:00 app[web.1]:
2013-10-19T17:25:15.529083+00:00 app[web.1]: ^
2013-10-19T17:25:15.529083+00:00 app[web.1]: PG::UndefinedColumn: ERROR: column "votes_count" does not exist
2013-10-19T17:25:15.529083+00:00 app[web.1]: LINE 1: ...5998' AND '2013-10-19 17:25:15.526107') ORDER BY votes_coun...
2013-10-19T17:25:15.529083+00:00 app[web.1]: LINE 1: ...5998' AND '2013-10-19 17:25:15.526107') ORDER BY votes_coun...
2013-10-19T17:25:15.529083+00:00 app[web.1]: ^
2013-10-19T17:25:15.531695+00:00 app[web.1]: : SELECT "links".* FROM "links" WHERE ("links"."created_at" BETWEEN '2013-10-12 17:25:15.525998' AND '2013-10-19 17:25:15.526107') ORDER BY votes_count DESC LIMIT 100):
2013-10-19T17:25:15.529798+00:00 app[web.1]: Completed 500 Internal Server Error in 4ms
2013-10-19T17:25:15.531841+00:00 app[web.1]: 10: </thead>
2013-10-19T17:25:15.531841+00:00 app[web.1]: 9: </tr>
2013-10-19T17:25:15.531841+00:00 app[web.1]:
2013-10-19T17:25:15.531841+00:00 app[web.1]:
2013-10-19T17:25:15.529687+00:00 app[web.1]: Rendered links/index.html.erb within layouts/application (3.8ms)
2013-10-19T17:25:15.529083+00:00 app[web.1]: : SELECT "links".* FROM "links" WHERE ("links"."created_at" BETWEEN '2013-10-12 17:25:15.525998' AND '2013-10-19 17:25:15.526107') ORDER BY votes_count DESC LIMIT 100
2013-10-19T17:25:15.531841+00:00 app[web.1]: 11: <tbody class="stories">
2013-10-19T17:25:15.531524+00:00 app[web.1]: : SELECT "links".* FROM "links" WHERE ("links"."created_at" BETWEEN '2013-10-12 17:25:15.525998' AND '2013-10-19 17:25:15.526107') ORDER BY votes_count DESC LIMIT 100):
2013-10-19T17:25:15.529798+00:00 app[web.1]: Completed 500 Internal Server Error in 4ms
2013-10-19T17:25:15.531524+00:00 app[web.1]: 11: <tbody class="stories">
2013-10-19T17:25:15.531524+00:00 app[web.1]: LINE 1: ...5998' AND '2013-10-19 17:25:15.526107') ORDER BY votes_coun...
2013-10-19T17:25:15.531524+00:00 app[web.1]: ActionView::Template::Error (PG::UndefinedColumn: ERROR: column "votes_count" does not exist
2013-10-19T17:25:15.531524+00:00 app[web.1]: 10: </thead>
2013-10-19T17:25:15.531695+00:00 app[web.1]: ActionView::Template::Error (PG::UndefinedColumn: ERROR: column "votes_count" does not exist
2013-10-19T17:25:15.531695+00:00 app[web.1]: LINE 1: ...5998' AND '2013-10-19 17:25:15.526107') ORDER BY votes_coun...
2013-10-19T17:25:15.531524+00:00 app[web.1]:
2013-10-19T17:25:15.531524+00:00 app[web.1]: 12: <% Link.most_voted.each do |link| %>
2013-10-19T17:25:15.531841+00:00 app[web.1]: app/views/links/index.html.erb:12:in `_app_views_links_index_html_erb___4309851234159801657_70037839513200'
2013-10-19T17:25:15.531695+00:00 app[web.1]: 14: <%= f.hidden_field :link_id %>
2013-10-19T17:25:15.531524+00:00 app[web.1]: 13: <%= form_for link.votes.new do |f| %>
2013-10-19T17:25:15.531695+00:00 app[web.1]:
2013-10-19T17:25:15.531695+00:00 app[web.1]: 15: <%= f.submit '▲' %>
2013-10-19T17:25:15.531841+00:00 app[web.1]: 12: <% Link.most_voted.each do |link| %>
2013-10-19T17:25:15.531695+00:00 app[web.1]: app/views/links/index.html.erb:12:in `_app_views_links_index_html_erb___4309851234159801657_70037839513200'
2013-10-19T17:25:15.531841+00:00 app[web.1]: 13: <%= form_for link.votes.new do |f| %>
2013-10-19T17:25:15.531524+00:00 app[web.1]: 9: </tr>
2013-10-19T17:25:15.531695+00:00 app[web.1]:
2013-10-19T17:25:15.531841+00:00 app[web.1]: 15: <%= f.submit '▲' %>
2013-10-19T17:25:15.531695+00:00 app[web.1]: ^
2013-10-19T17:25:15.531841+00:00 app[web.1]: 14: <%= f.hidden_field :link_id %>
2013-10-19T17:25:16.054820+00:00 heroku[router]: at=info method=GET path=/favicon.ico host=infinite-castle-2099.herokuapp.com fwd="99.90.16.79" dyno=web.1 connect=2ms service=10ms status=200 bytes=0
2013-10-19T17:25:15.537591+00:00 heroku[router]: at=info method=GET path=/ host=infinite-castle-2099.herokuapp.com fwd="99.90.16.79" dyno=web.1 connect=2ms service=14ms status=500 bytes=1266
votes_count显然，它说即使它在我的 schema.rb 中也找不到：
create_table "links", force: true do |t|
t.string "description"
t.string "url"
t.datetime "created_at"
t.datetime "updated_at"
t.integer "user_id"
t.integer "votes_count"
end