Re: backrefs using ref name / annotations?

gmane wrote:
> Hello,
> 
> (crossposting - hopefully not inappropriately)
> 
> I need automatic back references (just two-way references, really), but 
> would like to find a way to have them using stock AT ref fields & 
> widgets (I have taken a look at ATBackRef product).
> 
> I thought of a mechanism hooked somewhere that would (ab)use 
> ReferenceField "relationship" property: upon reference creation, the 
> mechanism would see if the target has a ReferenceField whose 
> relationship attribute has the same value as the source relationship, 
> and then automatically add another reference, ie. from the target to the 
> source. Are there any places where this kind of hooks can be registered 
> btw?
> 
> I don't know if using relationships this way confuses the reference 
> system somehow - what are the consequences? I read something about 
> reference annotations - could they be used for this purpose somehow?
> 
> I guess there's an easy way, too - just add a field property 
> "[relationshipname]_inverese" in the field that is to be used as the 
> back reference?
> 
> Overall, perhaps this kind of automatic backref mechanism using stock AT 
> fields & widgets would be useful enough to be added to Archetypes?
> 
> Thoughts?
> 
> Thanks,
> 
>  Petri
> 

references are inherently 2 way, they just happen to be stored on the 
source.  for most cases, having a special field or class is overkill.

fyi, there is already an api for backrefs.

-w



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