Rails rake任务将实时（MySQL）数据库加载到本地开发数据库

Question

For years I've used a ssh pipe from mysqldump on the live server to mysql on my development machine for getting a copy of the current data.

ssh -C <server> mysqldump --opt <live_database_name> |mysql <local_dev_database_name>

Where -C enables ssh compression and --opt enables quickness and completeness.

Does anyone have a rails-ish equivalent rake task for this? Ideally it'd take the database names from config/database.yml

Answer 1

https://gist.github.com/750129

This is not an elegant solution. It's basically a wrapper for your old method, so it's not even compatible with other database drivers.

But it is something you can put in your SCM under lib/tasks to share it with other developers on your team. It also uses config data from your existing config/database.yml file. You define the live db by simply adding another branch to that file and it uses the same key names that Rails do.

Maybe it would even make sense to reuse the production database configuration.

Answer 2

Here's one I use for a Postgres database: https://gist.github.com/748222 .

There are three tasks: db:download , db:replace and db:restore . db:restore is just a wrapper around the other two.

I'd say you could do something similar for Mysql pretty quickly as well. I just use the latest backup in this case instead of creating it at runtime.

Answer 3

If you are fine with coding in Ruby you might want to look into seed-fu and activerecord-import .

Oh, I forgot to mention standalone-migrations . It comes with a Rake task for schema migrations.

Good luck!

Answer 4

我没有使用rake来执行此操作，而是使用capistrano任务，因为您的capistrano任务已经知道生产服务器的位置等等...

Answer 5

Theoretically you should be able to create another "instance" in database.yml (for your live server) and put the correct host there (and leave the rest username/passwords etc). In your rake task you would load the database yaml file, read the host and go on with your command line slurpiness. It could easily be wrapped up in a rake task.