changing database from PostgreSQL to MySQL in a Ruby on Rails app

问题

In my current application i am using PostgreSQL Data base,

but I want to change the PostgreSQL database into MYSQL DB.

if it's impossible ?

回答1:

Step 1

Make a backup copy of your data

For Rails 3, install the YAML DB gem: https://github.com/ludicast/yaml_db

For Rails 2.x install the YAML DB plugin:

script/plugin install git://github.com/adamwiggins/yaml_db.git

Run the dump task

rake db:dump

Step 2

Update your config/database.yml file.

Step 3 :

gem install mysql

Have rake create your database

rake db:create

rake db:schema:load

Step 4

Use YamlDb to reload your data into MySql

rake db:load

回答2:

this is a duplicate

Migrate database from Postgres to MySQL

dont forget to change the gems and your database config file to something like this:

development:
  adapter: mysql2
  encoding: utf8
  database: my_db_name
  username: root
  password: my_password
  host: 127.0.0.1
  port: 3306

来源：https://stackoverflow.com/questions/24237034/changing-database-from-postgresql-to-mysql-in-a-ruby-on-rails-app