Re: Urgent Help needed: How to Correct this table so it doesn't have Composite Primary Key?

I think what AD was saying is that the primary purpose of a UUID *when compared with an integer* is that it is globally unique across all servers, not just 'this' server, which of course I forgot to point out in my original reply. This means you have a choice of data type when creating a primary key, both of which have pros/cons. However, it is still a primary key, which has the primary purpose of ensuring data/model integrity.

As far as coding data saves, see http://book.cakephp.org/view/75/Saving-Your-Data for full details.

Jeremy Burns

Class Outfit

jeremyburns@classoutfit.com

http://www.classoutfit.com

On 31 Dec 2010, at 17:09, John Maxim wrote:

So normally we don't use char(36) ? and its primary purpose is not for
data /model integrity .. if I hear you right, AD.

Is the Model::save method the way we usually save by calling

function add()
{
}

are there additional steps ?

thanks, best regards.
Maxim


On Dec 29 2010, 7:29 am, AD7six <andydawso...@gmail.com> wrote:

On Dec 28, 3:55 am, John Maxim <goog...@gmail.com> wrote:

Hi Jeremy, Thanks for your link will definitely look into that.

~~Continue my question~~

I was going to ask about using this:http://book.cakephp.org/view/1027/query

There are 2 options if I'm correct based on cookbook 1.3

~~

Rather than using an auto-increment key as the primary key, you may

also use char(36). Cake will then use a unique 36 character uuid

(String::uuid) whenever you save a new record using the Model::save

method.

according to:http://book.cakephp.org/view/903/Model-and-Database-Conventions

~~

What's the advantage of using char(36) ?

A uuid (a 36 char string) is unique - always. It's main purpose is to

be unique, nothing else. Obfuscation is a side effect, not the goal.

They are most relevant with distributed datastores whereby you need to

synchronize data and inserts across multiple servers. An insert on

server A can safely and without concern be replicated to server B

because a row with the same ID cannot exist originating from another

server.

http://en.wikipedia.org/wiki/Universally_unique_identifier

AD

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