ruby-on-rails - 使用外部 postgres 数据库将 rails 部署到 Heroku

Question

首先，我完全是个 Rails/PostgreSQL 菜鸟。

我正在尝试将 Rails 应用程序部署到 Heroku。我已经启动并运行它，但每次部署时，Heroku 都会忽略我的 database.yml 信息并生成一个新数据库。这是我的 database.yml

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
#
default: &default
 adapter: sqlite3
 pool: 5
 timeout: 5000

development:
 # <<: *default
 #  database: db/development.sqlite3
 adapter: postgresql
 pool: 5
 host: wwydh.cqqq2sesxkkq.us-east-1.rds.amazonaws.com
 timeout: 5000
 username: wwydh_a_team
 password: really cool password
 database: wwydh
 host: wwydh.cqqq2sesxkkq.us-east-1.rds.amazonaws.com
 port: 5432


# 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.sqlite3

我做错了什么？

Answer 1

heroku config:add DATABASE_URL=postgres://{user}:{password}@{hostname}:{port}/{database-name}

然后重新部署您的应用。它将读取您的 DATABASE_URL 并从中生成 database.yml。

编辑
根据这个SO question需要先分离数据库，然后更新变量 DATABASE_URL。

heroku addons:attach heroku-postgresql -a <app_name> --as HEROKU_DATABASE
heroku addons:detach DATABASE -a <app_name>
heroku config:add DATABASE_URL=.....