ruby-on-rails - ActiveRecord::NoDatabaseError fatal error :数据库 "db/development.postgresql"不存在

Question

我正在构建一个小型应用程序，它在本地运行。然后当我去 Heroku 上部署它时，我的终端中弹出了这个错误:

remote:        An error occurred while installing sqlite3 (1.3.11), and 

Bundler cannot
remote:        continue.
remote:        Make sure that `gem install sqlite3 -v '1.3.11'` succeeds before bundling.
remote:  !
remote:  !     Failed to install gems via Bundler.
remote:  !     
remote:  !     Detected sqlite3 gem which is not supported on Heroku.
remote:  !     https://devcenter.heroku.com/articles/sqlite3
remote:  !
remote: 
remote:  !     Push rejected, failed to compile Ruby app
remote: 
remote: Verifying deploy...
remote: 
remote: !   Push rejected to pockettheskimm.
remote: 
To https://git.heroku.com/pockettheskimm.git
 ! [remote rejected] master -> master (pre-receive hook declined)

我随后 read the documentation on Heroku ，这告诉我必须在我的应用程序中使用 Postgres 而不是 sqlite3。所以我更新了我的应用程序，将 sqlite3 换成了 Postgres:

default: &default
  adapter: postgresql
  pool: 5
  timeout: 5000

development:
  <<: *default
  database: db/development.postgresql

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  <<: *default
  database: db/test.postgresql

production:
  <<: *default
  database: db/production.postgresql

但现在当我在本地运行应用程序时，我在浏览器中收到此错误:

ActiveRecord::NoDatabaseError
FATAL: database "db/development.postgresql" does not exist

Extracted source (around line #661):
659
660
661
662
663
664

        rescue ::PG::Error => error
          if error.message.include?("does not exist")
            raise ActiveRecord::NoDatabaseError.new(error.message, error)
          else
            raise
          end

我该怎么做才能解决这个问题？

Answer 1

这是对我有用的答案:

“在更改 database.yml 配置文件后，您是否在开发中运行了 rake db:create && rake db:migrate？”

归功于https://stackoverflow.com/users/163640/eugen