I just got a copy of "Rails Recipes" and I see in the index
15. Connecting to Multiple Databases
I literally just got the book, so I can't give you any details, but
this might help get you to a solution.
Note that the OT comment is probably correct as it is Rails, not
Mongrel that deals with the database. You may want to try the Rails
mailing list archives.
- Jim
----- Original Message -----
From: "Steve Midgley" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, March 13, 2007 1:00 PM
Subject: Re: [Mongrel] Mongrel cluster with one app and many mysql
databases
> Hi,
>
> This is getting a little OT but I think you can easily switch your
> database connections by playing with which environment you're
> running
> in when the rails system starts up. This doesn't get you all the way
> to
> your solution but should point out the line of code you'll want to
> investigate.
>
> For example, if you were to start up 10 scratch Rails instances and
> had
> 10 entries in your database.yml file, one for each configuration,
> you
> could load 10 different db instances: for each one you would provide
> a
> different "RAILS_ENV" environment variable (corresponding to the
> appropriate entry in database.yml). Then you'd be running 10
> different
> production instances with 10 dif. connections.
>
> What you want is a little trickier b/c you want to switch db
> instances
> on the fly with a single instance of Rails. But I still don't think
> this is going to be too difficult. For example, it's possible access
> an
> alternate database configuration entry with this line of code in the
> environment.rb file:
>
> config.database_configuration["development"]["database"]
>
> How and where to make the switch in an active running Rails server,
> I
> don't know, but it looks very plausible.
>
> I hope this helps get you started,
>
> Steve
>
>
> At 09:46 AM 3/13/2007, [EMAIL PROTECTED] wrote:
>>Message: 7
>>Date: Tue, 13 Mar 2007 14:15:40 +0100
>>From: Jens Carroll <[EMAIL PROTECTED]>
>>Subject: Re: [Mongrel] Mongrel cluster with one app and many mysql
>> databases
>>To: [email protected]
>>Message-ID: <[EMAIL PROTECTED]>
>>Content-Type: text/plain; charset=ISO-8859-1
>>
>>Thanks Alexey,
>>
>>I got also more and more to the point where it is clearly not a
>>mongrel
>>problem.
>>
>>Thanks for the answer, but if someone has done that before I would
>>really appreciate any pointer.
>>
>>Jens
>>
>>Alexey Verkhovsky schrieb:
>> >> convince mongrel (or the app) to switch databases on request
>> (maybe
>> > with the rails routing facilities)
>> >
>> > 10 databases with the same structure but different data? This is
>> doable.
>> > You'd have to hack it yourself, probably by replacing
>> ActiveRecord::
>> > Base.connection with something that will internally hold 10
>> connections
>> > and switch dynamically.
>> >
>> > None of will have anything to do with Mongrel though. Mongrel is
>> not a
>> > J2EE container, it has no notion of database connections.
>> >
>> > Alex
>
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