launchpad-dev team mailing list archive

[Jeroen Vermeulen <jtv@xxxxxxxxxxxxx>]

On 2010-08-02 18:35, Julian Edwards wrote:

> Based on some of the text in https://dev.launchpad.net/Collections I am also a
> bit concerned that there's some overlap with our utility IXXXSet classes.

There should be, yes.  A Collection should be less of a dumping ground 
for "objectless" functions related to a class and more of a lightweight 
and flexible way to construct various kinds of sets and subsets.


> "Which will mean that you can getUtility(IAllFoo) to start working with a
> collection. "
>
> This is functionally identical to getUtility(IFooSet) which is our existing
> pattern for collections (and there's webservice exports for those too).

If you already have a utility for Foo, I don't suppose there's any need 
for a separate IFooCollection utility.  You could either make the 
collection a base class there or return it from a utility method.

One thing that might be nice to add is a shorthand method for "get by 
id."  That's something we keep needing again and again anyway.


Jeroen