Heroku生产环境出现PG::UndefinedTable数据库错误，求解决方案

Hey there, let's turn that messy Heroku log output into something readable with Markdown. Here's a clean, formatted version plus some tips to make log parsing easier:

Wrap the entire log snippet in a code block to preserve its structure, then highlight key details to speed up debugging:

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, [2018-04-15T22:51:12.811...]

Quick Log Formatting Tips #

• Code Blocks: Always use triple backticks (```) around log content—this keeps timestamps, process IDs, and spacing intact, which is critical for tracking down issues.
• Highlight Key Data: Wrap unique request IDs (like [cd1ed367-c720-4568-ac03-a3b1bec4fc1b]) and controller/actions (like PatientsController#index) in asterisks (*) to make them stand out. This lets you trace a single request across multiple log lines in seconds.
• Split Lines: If your raw log comes as a single long string, split it into individual lines matching each log event—this eliminates horizontal scrolling and makes the flow of events crystal clear.

内容的提问来源于stack exchange，提问作者EneioArzew