Re: [chiPHPug-discuss] OOP structuring question

[Richard L. <ce...@l-...>]

This came through just fine.

You may have set up mailman to not show you your own posts...

I think that's one of the options in the setup on the list preferences.

On Wed, June 10, 2009 2:10 pm, Wilfried Schobeiri wrote:
> This could be very expensive, but if you want to truly go all out OOP/
> ORM-like, have you thought about returning an object instead of
> returning a list or array? This object could perhaps mirror/extend a
> pre-defined one, with functions that then go off and fetch the
> details?
>
> Ex:
> $member = new Member($member_id);
> $photos = $member->getPhotos(where $query=''); //gets all photos,
> results in $photos
> $details = $photos->getDetails(); //gets all details about $photos,
> results in $details? or perhaps getDetails() just populates $photos
> further, no need for the return? whatever is prettier to you.
>
> with $member containing the member data in a way thats useful to the
> methodsin the object
> with $photos containing the data of the getPhotos query thats userful
> to methods within a photos structure
> with $details somehow containing some stdclass structure/array/
> whatever that contains what youre looking for in an interable method.
>
> This way you avoid having to iterate and do individual queries. Then
> again, you might actually want to do that. I don't know what your
> workload looks like or if it even matters. With the getDetails()
> function as above, it gives you the option to query as you'd like. I'd
> personally throw the IDs in a IN() query limited to 20 ids per each
> query, post multiget on my cache (The 20 limit is to avoid innodb mvcc
> deadlocks on high concurrency systems, ymmv).
>
> I'd be interested to see how others disagree with me on this. I
> personally don't spend tons of time going out of my way to make my
> code all OOP'ed up just for the sake of OOP. For some things, OOP just
> isn't the right axe.
>
>
> On Jun 10, 2009, at 13:33 , Arlo Leach wrote:
>
>> Hi folks,
>>
>> I'm doing my first project with a fully object-oriented approach and
>> I have
>> a question about how you all would break the code apart.
>>
>> Let's say I have a social networking site where members can upload
>> photos,
>> and I want to display a particular member's photos.
>>
>> One approach is to have a Member object, with a method getPhotos,
>> that
>> returns the IDs of the photos that belong to that member; and to
>> have a
>> Photo object, with a method getDetails, that returns the details for
>> a given
>> photo. In order to display a member's photos, I would first call
>> getPhotos
>> for the member, then call getDetails for each of the returned
>> photos. This
>> makes sense from an encapsulation perspective, but it seems wasteful
>> because
>> I'd have one initial database query plus an additional query for
>> each photo.
>>
>> I could build getDetails so that it can take a list of IDs and
>> return the
>> details for all the photos at once, and then I'd just have two
>> queries. Or I
>> could build a getPhotosByMember method that accepts a member ID as
>> an
>> argument and returns the details for all the photos belonging to
>> that
>> member. Then I'd be down to one query, but I would probably end up
>> building
>> several similar methods (e.g., getRecentPhotos) that would have
>> redundant
>> code.
>>
>> What would you say is the normal or accepted way to structure this?
>>
>> Thanks,
>> -Arlo
>>
>> _______________________________
>>
>> Arlo Leach
>> 773.769.6106
>> http://arlomedia.com
>>
>>
>>
>>
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>
>
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