运行Ruby on Rails迁移，已更新schema.rb，但更改未反映在psql数据库中

Question

I have a ruby on rails application already running in production. The database has records which I do not want to loose. I had to add and run new migrations to add some new columns to existing tables. The migrations run successfully and the schema.rb file reflects the changes but the changes do not appear in the database or existing table structure.

Based on research online, rake db:schema:load updates the db based on the schema.rb file. But this resets the database.

It is crucial that I do not loose the data in the tables.Is there any way to solve this? I am fairly new to ruby on rails.

Answer 1

I was able to fix it. I checked the status of migrations in the production environment rake db:migrate:status RAILS_ENV=production and realised they were down. I then run rake db:migrate RAILS_ENV=production and that did it. Changes now reflect in the db. Thanks @muistooshort for the nudge in the right direction