Ruby on rails 生产上的Heroku数据库错误：PG:：不可定义错误

每次我在Heroku上运行应用程序时，日志中都会显示以下内容：

2018-04-15T22:51:12.806576+00:00 app[web.1]: I, [2018-04-15T22:51:12.806420 #4]  INFO -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b] Started GET "/patients" for 112.205.217.139 at 2018-04-15 22:51:12 +0000
2018-04-15T22:51:12.808307+00:00 app[web.1]: I, [2018-04-15T22:51:12.808235 #4]  INFO -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b] Processing by PatientsController#index as HTML
2018-04-15T22:51:12.811835+00:00 app[web.1]: I, [2018-04-15T22:51:12.811756 #4]  INFO -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]   Rendering patients/index.html.erb within layouts/application
2018-04-15T22:51:15.563600+00:00 heroku[router]: at=info method=GET path="/patients" host=jdent-patrec.herokuapp.com request_id=cd1ed367-c720-4568-ac03-a3b1bec4fc1b fwd="112.205.217.139" dyno=web.1 connect=0ms service=2757ms status=500 bytes=1827 protocol=https
2018-04-15T22:51:15.557887+00:00 app[web.1]: D, [2018-04-15T22:51:15.557726 #4] DEBUG -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]   [1m[36mPatient Load (2.7ms)[0m  [1m[34mSELECT "patients".* FROM "patients"[0m
2018-04-15T22:51:15.558988+00:00 app[web.1]: I, [2018-04-15T22:51:15.558899 #4]  INFO -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]   Rendered patients/index.html.erb within layouts/application (2747.0ms)
2018-04-15T22:51:15.559386+00:00 app[web.1]: I, [2018-04-15T22:51:15.559271 #4]  INFO -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b] Completed 500 Internal Server Error in 2751ms (ActiveRecord: 2589.2ms)
2018-04-15T22:51:15.560650+00:00 app[web.1]: F, [2018-04-15T22:51:15.560581 #4] FATAL -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]   
2018-04-15T22:51:15.560736+00:00 app[web.1]: F, [2018-04-15T22:51:15.560661 #4] FATAL -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b] ActionView::Template::Error (PG::UndefinedTable: ERROR:  relation "patients" does not exist
2018-04-15T22:51:15.560739+00:00 app[web.1]: LINE 1: SELECT "patients".* FROM "patients"
2018-04-15T22:51:15.560741+00:00 app[web.1]:                                  ^
2018-04-15T22:51:15.560742+00:00 app[web.1]: : SELECT "patients".* FROM "patients"):
2018-04-15T22:51:15.561063+00:00 app[web.1]: F, [2018-04-15T22:51:15.560972 #4] FATAL -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]     22:     </thead>
2018-04-15T22:51:15.561066+00:00 app[web.1]: [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]     23:   
2018-04-15T22:51:15.561067+00:00 app[web.1]: [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]     24:     <tbody>
2018-04-15T22:51:15.561069+00:00 app[web.1]: [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]     25:       <% @patients.each do |patient| %>
2018-04-15T22:51:15.561071+00:00 app[web.1]: [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]     26:         <tr>
2018-04-15T22:51:15.561072+00:00 app[web.1]: [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]     27:           <td><%= patient.id %></td>
2018-04-15T22:51:15.561074+00:00 app[web.1]: [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]     28:           <td><%= patient.first_name %></td>
2018-04-15T22:51:15.561133+00:00 app[web.1]: F, [2018-04-15T22:51:15.561061 #4] FATAL -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]   
2018-04-15T22:51:15.561200+00:00 app[web.1]: F, [2018-04-15T22:51:15.561139 #4] FATAL -- : [cd1ed367-c720-4568-ac03-a3b1bec4fc1b] app/views/patients/index.html.erb:25:in `_app_views_patients_index_html_erb___2618543925626266733_38249580'

错误图片：

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几天来，我一直在寻找这个问题，但没有结果。

您最近创建了这个表吗？如果是，试试看

heroku run rails db:migrate

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您从Rails控制台为患者提供了什么？heroku run rails控制台您可以从错误消息输出中分享更多信息吗？我编辑了这个问题，以便在转到患者索引时显示完整的错误日志。您是否在heroku框上运行了rake db:migrate？heroku run rails db:migrate