From lists at ruby-forum.com  Thu Jun  5 15:55:00 2008
From: lists at ruby-forum.com (Alexey Petrushin)
Date: Thu, 5 Jun 2008 21:55:00 +0200
Subject: [Nitro] Og and the 'Composite' pattern.
Message-ID: <8dee38d0c2ea63f929e935429bcc7b13@ruby-forum.com>

Hello, is there a way to implement the 'Composite' pattern in Og?

Probably it should looks like this:

    class Item
      property :name, String
      belongs_to :parent, Item
    end

    class Container < Item
      has_many :items, Item
    end

    class Image < Item; end
    class Post < Item; end
    class Folder < Container; end

But i failed to achieve this with Og :(

P.S.
Does ActiveRecords or DataMapper support this feature?

Thanks!
-- 
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From lists at ruby-forum.com  Thu Jun  5 16:03:46 2008
From: lists at ruby-forum.com (Alexey Petrushin)
Date: Thu, 5 Jun 2008 22:03:46 +0200
Subject: [Nitro] Partially solution.
In-Reply-To: <8dee38d0c2ea63f929e935429bcc7b13@ruby-forum.com>
References: <8dee38d0c2ea63f929e935429bcc7b13@ruby-forum.com>
Message-ID: <57f1377545fed3a8ff99877782a66047@ruby-forum.com>

Partially solution. It's possible to implement subject this way:

    class Item
      property :name, String
      belongs_to :parent, Object
    end

    class Container < Item
      has_many :items, Item
    end

    class Folder < Item
      has_many :items, Item
    end

But, there are major disadvantages:
- Code duplication, each 'Container' should explicitly include 'has_many 
...'.
- Instead of 'Item' you forced to use 'Container::Item' and 
'Folder::Item' and remember about it.
- Instead of one 'Item' table you got two distinct 'container_item' and 
'folder_item' tables.

So, this is not the best solution ... :(
-- 
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From lists at ruby-forum.com  Thu Jun  5 19:28:50 2008
From: lists at ruby-forum.com (Alexey Petrushin)
Date: Fri, 6 Jun 2008 01:28:50 +0200
Subject: [Nitro] Og and 'duck typing' search
Message-ID: <850f422b6e6502ff49907872cbf9205c@ruby-forum.com>

Can Og search for 'name' in all 'managed' classes?

I.e. there are: Post, User, Topic, Comment, ..., and all of them have
the 'name' property. So, can i use something like:

        Og.search_by_name('my_name')?

Or i should explicitly do it for all classes? I.e.:

        Post.search_by_name('my_name').
        concat(User.search_by_name('my_name')).
        concat ...
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From george.moschovitis at gmail.com  Fri Jun  6 04:13:46 2008
From: george.moschovitis at gmail.com (George Moschovitis)
Date: Fri, 6 Jun 2008 11:13:46 +0300
Subject: [Nitro] Og and 'duck typing' search
In-Reply-To: <850f422b6e6502ff49907872cbf9205c@ruby-forum.com>
References: <850f422b6e6502ff49907872cbf9205c@ruby-forum.com>
Message-ID: <afd80b540806060113l695d48fv10427d97c47b0200@mail.gmail.com>

No you should do it for all classes:

User.find_by_name(name)
Post.find_by_name(name)

etc...

-g.

On Fri, Jun 6, 2008 at 2:28 AM, Alexey Petrushin <lists at ruby-forum.com>
wrote:

> Can Og search for 'name' in all 'managed' classes?
>
> I.e. there are: Post, User, Topic, Comment, ..., and all of them have
> the 'name' property. So, can i use something like:
>
>        Og.search_by_name('my_name')?
>
> Or i should explicitly do it for all classes? I.e.:
>
>        Post.search_by_name('my_name').
>        concat(User.search_by_name('my_name')).
>        concat ...
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Nitro-general mailing list
> Nitro-general at rubyforge.org
> http://rubyforge.org/mailman/listinfo/nitro-general
>



-- 
http://gmosx.me.gr
http://joy.gr
http://cull.gr
http://nitroproject.org
http://phidz.com
http://joyerz.com
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From arne at arnebrasseur.net  Sat Jun  7 05:39:21 2008
From: arne at arnebrasseur.net (Arne Brasseur)
Date: Sat, 07 Jun 2008 11:39:21 +0200
Subject: [Nitro] Og and 'duck typing' search
In-Reply-To: <afd80b540806060113l695d48fv10427d97c47b0200@mail.gmail.com>
References: <850f422b6e6502ff49907872cbf9205c@ruby-forum.com>
	<afd80b540806060113l695d48fv10427d97c47b0200@mail.gmail.com>
Message-ID: <484A5749.403@arnebrasseur.net>

You should be able to do something like

Og.managed_classes.map {|c| c.find_by_name(name)}.flatten

A.

George Moschovitis wrote:
> No you should do it for all classes:
>
> User.find_by_name(name)
> Post.find_by_name(name)
>
> etc...
>
> -g.
>
> On Fri, Jun 6, 2008 at 2:28 AM, Alexey Petrushin <lists at ruby-forum.com 
> <mailto:lists at ruby-forum.com>> wrote:
>
>     Can Og search for 'name' in all 'managed' classes?
>
>     I.e. there are: Post, User, Topic, Comment, ..., and all of them have
>     the 'name' property. So, can i use something like:
>
>            Og.search_by_name('my_name')?
>
>     Or i should explicitly do it for all classes? I.e.:
>
>            Post.search_by_name('my_name').
>            concat(User.search_by_name('my_name')).
>            concat ...
>     --
>     Posted via http://www.ruby-forum.com/.
>     _______________________________________________
>     Nitro-general mailing list
>     Nitro-general at rubyforge.org <mailto:Nitro-general at rubyforge.org>
>     http://rubyforge.org/mailman/listinfo/nitro-general
>
>
>
>
> -- 
> http://gmosx.me.gr
> http://joy.gr
> http://cull.gr
> http://nitroproject.org
> http://phidz.com
> http://joyerz.com
> ------------------------------------------------------------------------
>
> _______________________________________________
> Nitro-general mailing list
> Nitro-general at rubyforge.org
> http://rubyforge.org/mailman/listinfo/nitro-general


-- 
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arne at arnebrasseur.net

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From william.full.moon at gmail.com  Sat Jun  7 14:51:05 2008
From: william.full.moon at gmail.com (* William)
Date: Sun, 8 Jun 2008 04:51:05 +1000
Subject: [Nitro] Partially solution.
In-Reply-To: <57f1377545fed3a8ff99877782a66047@ruby-forum.com>
References: <8dee38d0c2ea63f929e935429bcc7b13@ruby-forum.com>
	<57f1377545fed3a8ff99877782a66047@ruby-forum.com>
Message-ID: <9e03c3c60806071151u4dfbeabfvb1e3bdee27aec3c2@mail.gmail.com>

Thanks there Alexey

I love this post!  I have a design need for exactly thing like (both) 'Item'
and 'Container'.

As well, I'd like to make a "generic" 'Container' that cna accept 'Items"
sub-clases too.

I'd like though to do ...

            *class *Data_Table_stuff
                *property*     subclass-of-Item
                *property*     subclass-of-Container

            *end *# Data_Table_stuff

I'll admit that I'm sitting back on this.  My issuer -- Still some solid Og
base is a precursor.

:-)


2008/6/6 Alexey Petrushin <lists at ruby-forum.com>:

> Partially solution. It's possible to implement subject this way:
>
>    class Item
>      property :name, String
>      belongs_to :parent, Object
>    end
>
>    class Container < Item
>      has_many :items, Item
>    end
>
>    class Folder < Item
>      has_many :items, Item
>    end
>
> But, there are major disadvantages:
> - Code duplication, each 'Container' should explicitly include 'has_many
> ...'.
> - Instead of 'Item' you forced to use 'Container::Item' and
> 'Folder::Item' and remember about it.
> - Instead of one 'Item' table you got two distinct 'container_item' and
> 'folder_item' tables.
>
> So, this is not the best solution ... :(
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Nitro-general mailing list
> Nitro-general at rubyforge.org
> http://rubyforge.org/mailman/listinfo/nitro-general
>



-- 
aloha,
\_w_/
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From lists at ruby-forum.com  Sun Jun 29 00:37:09 2008
From: lists at ruby-forum.com (Alex Hawker)
Date: Sun, 29 Jun 2008 06:37:09 +0200
Subject: [Nitro] Amazon S3
In-Reply-To: <afd80b540801070647n11f48f2ev3c78cb658efd6d06@mail.gmail.com>
References: <afd80b540801070358q771bd857vdd58831c1c9182b1@mail.gmail.com>
	<389c43e40801070627n132d4af9r95e2b79069bd3980@mail.gmail.com>
	<afd80b540801070647n11f48f2ev3c78cb658efd6d06@mail.gmail.com>
Message-ID: <2f9f34c4b2e47ce87495b915a38d3c35@ruby-forum.com>

Agreed! I found a few good tutorials online as well.  Maybe you'll find 
what you're looking for: 
http://www.newwebplatform.com/tips-and-tutorials/Amazon-S3

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