[Dev] Uses of <cloudAlias>?

[Morgen Sagen]

On Jun 2, 2005, at 3:14 PM, Phillip J. Eby wrote:

> At 02:43 PM 6/2/2005 -0700, Morgen Sagen wrote:
>
>> I do have a situation in which I want to override an endpoint that  
>> normally would get inherited; ContentItem's sharing cloud has a  
>> "displayName" endpoint -- however for ItemCollection (which  
>> subkinds ContentItem) I don't want to have a displayName  
>> endpoint.  My fix for this was to define a displayName endpoint on  
>> ItemCollection's sharing cloud but set that endpoint's  
>> includePolicy to "none".  Does that work with your syntax?
>>
>
> If we have a schema.Endpoint type, such that you can set any  
> attributes on it that you want, then sure, you'd just add that  
> endpoint to the cloud.  (Remember that using attributes would be  
> just shorthand for defining an Endpoint.)
>
> Of course, whether that actually *does* what you're trying to do,  
> I'm not sure.  Have you actually tried that in a parcel.xml yet?   
> If it works there, then I can almost certainly make it work in the  
> Python syntax.
>
> I was originally planning to hold off on creating a schema.Endpoint  
> at first, since I hadn't yet seen a place where it would need to be  
> used, but if you have this usecase then I guess I'll need to have  
> it in the first version.  Alternatively, we could use a keyword  
> like "exclude", e.g.
>
>     sharing = schema.Cloud(exclude=[displayName], ...)
>
> in order to define empty endpoints, especially if this is expected  
> to be a common use case.

It's probably not a common thing to do, but I do need it in this one  
case at least.  I think "exclude=" is an ok way to specify this.

Another include policy that exists (although we don't use it) is  
"byMethod" which takes a "method" attribute.  (See http://o11n.org/ 
docs/current/api/repository.schema.Cloud.Cloud-class.html#getItems )   
Since we don't actually use this, perhaps that's a sign we don't need  
to support it; we could also simplify the problem by always having  
byMethod call a certain method name, passing in the current cloudAlias.