Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"

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From: Sebastian Riedel
Subject: Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Date: 01:41 on 27 Jul 2005

Am 27.07.2005 um 01:29 schrieb Cees Hek:

> On 7/26/05, Sebastian Riedel <sri@xxxx.xx> wrote:
>
>
>
>>
>> I said before that we have 80+ plugins using multiple inheritance and
>> all work fine together, stuff that would never be possible with
>> "pure" delegation.
>>
>>
>>
>
> But a lot of the plugins in Catalyst that 'won't work with delegation'
> don't actually change the behaviour of Catalyst.  They add extra
> functionality (for example, sessions or form validation).  In these
> cases you aren't using Multiple Inheritance in order to override
> certain functionality, you are using it as a convenient way to add
> extra helper methods to Catalyst.  This is more of a decorator or
> mixin pattern.  And you are right that delegation would be difficult
> to use for these.  This also won't show many of the problems of MI
> since these types of plugins generally use unique method names.
>
>

Indeed, but there are enough plug-ins using NEXT to add trigger
points and stuff...just easy and beautiful.
I'm sure i'll get flamed for this, but for me NEXT is AOP on steroids.

>
> However the Catalyst::Engine series of modules would be a good example
> where you could use delegation instead of MI.  You have a defined set
> of methods that each Engine module should provide in order to function
> correctly.  Here you are changing the way a certain (clearly defined)
> part of Catalyst behaves.
>
>

Exactly what we though a few weeks ago, we already have a working
branch using delegation for engine and dispatcher. (will be merged
with trunk soon) :)

http://dev.catalyst.perl.org/repos/Catalyst/branches/refactored/

>
>
>
>
>> Btw. for me, this was never a delegation vs. multiple inheritance
>> war, i use both, for the right task.
>>
>>
>>
>
> So perhaps DBIx::Class could use delegation for all clearly defined
> 'tasks' that need to be performed (SQL generation, iterators,
> relationships, etc...), but MI can be used for extending functionality
> that can not easily be plugged in to the existing infrastructure (I
> prefer mixins instead of MI for extending functionality but that has
> it's own set of problems too).
>
>

Agreed, use the right tool for the right job, but don't just outlaw
MI because you had a bad experience somewhen back in stoneage. ;)


P.S.: Third try, since it seems "someone" unsubscribed be from the  
list for whatever reason. :/


--
sebastian

(message missing)

Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 05:26 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 15:32 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 15:40 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 21:54 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 21:59 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 22:44 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:00 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 22:52 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 16:42 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tyler Rorabaugh 17:09 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 17:24 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 18:11 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 18:14 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 21:08 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 21:03 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 21:05 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 20:55 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 21:08 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:03 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:11 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 21:21 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 21:48 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 20:37 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 22:02 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:12 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 01:15 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 07:53 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 12:37 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 20:47 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Adrian Howard 21:03 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:01 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 22:05 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:21 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:02 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 22:35 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 17:15 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 18:05 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:54 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 15:14 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 15:16 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 18:31 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 19:08 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 18:36 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:23 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:53 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:55 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 00:26 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Brad Bowman 00:49 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 01:31 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sam Vilain 04:21 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
William Ross 09:44 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 16:59 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 17:07 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 17:47 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 18:15 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 18:58 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 19:25 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:20 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:39 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:13 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 23:14 on 26 Jul 2005

Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
=?ISO-8859-1?Q?Ask_Bj=F8rn_Hansen?= 23:27 on 26 Jul 2005

Re: Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
John Siracusa 00:39 on 27 Jul 2005

Re: Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
Matt S Trout 00:54 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:57 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:15 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 02:07 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 03:32 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 03:34 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 13:44 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 16:57 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Christopher Hicks 18:04 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 19:38 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 20:50 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:00 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 22:32 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 22:39 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 22:49 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 22:03 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 22:35 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
John Siracusa 02:08 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 23:10 on 25 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 07:27 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Michael G Schwern 06:48 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Perrin Harkins 14:56 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Tony Bowden 19:08 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Aaron Trevena 08:57 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Cees Hek 23:29 on 26 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Matt S Trout 00:02 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Sebastian Riedel 01:41 on 27 Jul 2005

Re: Delegation vs Hooks (was: Annouce: DBIx::Class, a.k.a "taking the easy way out")
Matt S Trout 00:07 on 27 Jul 2005

Re: Annouce: DBIx::Class, a.k.a "taking the easy way out"
Adrian Howard 14:41 on 27 Jul 2005