[deepamehta-devel] How do I find a Topic's Associations
j.neumann at junes.eu
Wed Jan 6 21:01:12 CET 2016
Thank you Jörg, that was already quite helpful. In addition I would
need to know how to receive the owner and modifier name and an easy way
for the assigned workspace via REST API. :)
Thank you very much in advance!
Am Montag, den 04.01.2016, 17:11 +0100 schrieb Jörg Richter:
> Hi Juergen,
> To get a list of all parent topics that are related to a given child
> topic (here: ID 1234) via a "Composition" association:
> You'll get a "result list" with an "items" array. The array contains
> the parent topics, or is empty.
> While this might already satisfy your need, keep in mind that a DM
> user is free to create arbitrary associations manually. The mentioned
> call just navigates at instance-level. No type-definitions are
> consulted. That is if the Composition association is created manually
> by a user (along with Parent and Child roles), it does not
> necessarily mean that it reflects an underlying **Composition
> Definition** (at type-level), and thus does not necessarily mean your
> (child) topic is in danger to be deleted by DM automatically.
> Actually you want to know if a topic is in danger to be deleted
> automatically by DM in the course of a update/delete request bound to
> one of its parents, right? This would mean you must investigate the
> type definitions too. You must look in the parent topic's type
> definition if an association definition (of type "Composition
> Definition") with a child type that matches your given child topic's
> type exists.
> To get the Topic Type definition for a given type URI (here:
> GET /core/topictype/dm4.notes.note
> Look in the "assoc_defs" array.
> Tell me if you need more info.
> On Jan 4, 2016, at 13:55, Juergen Neumann wrote:
> > Dear Jörg,
> > I am still working on my Python code for DeepaMehta. Here is my
> > problem: I want to excessively reuse existing Topics. Still, if a
> > Topic
> > is part of a composite and associated by a composition, I cannot
> > (and
> > do not want) to reuse it in another context.
> > How can I find out, where a Topic (by its ID) is being used
> > (associated) and if it is part of a composition - through the Rest
> > API?
> > Thx and greets,
> > Juergen
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