#93 ✓hold
Peter Ferne

Feature Request: has_n_through

Reported by Peter Ferne | November 23rd, 2009 @ 07:27 PM

It would be great to have a version of has_n analogous to has_many_through in Rails.

In my model I have some node types which are really little more than blank nodes (rather like join tables if you will) which are there primarily for structural purposes. A has_n_through method would dry up my model definitions a bit.

Comments and changes to this ticket

  • Peter Ferne

    Peter Ferne November 23rd, 2009 @ 08:04 PM

    To be clear I see this potentially being useful where I only have a node because I can't have a relationship between a node and a relationship, i.e. a three way relationship.

  • Andreas Ronge

    Andreas Ronge November 23rd, 2009 @ 08:36 PM

    • Tag cleared.

    I'm hoping to do a 0.3.3 release this week.
    Thinking of putting #92 and #93 in version 0.4.0.
    It will be a 0.4.0 because it will introduce braking changes (#92) - database has to be upgraded because of the rename of relationships.

    Have to do a little spike on this ticket.
    Of course, you are welcome to fork my git repo and come with a solution(s)

  • Peter Ferne

    Peter Ferne November 24th, 2009 @ 10:22 AM

    Thanks for taking the ideas on board. I'd be very happy to fork and fix but I may have to wait a couple of weeks (and just work around it for now) as I have a release of the project I am working on coming up. If and when I do I'll send you a pull request.

  • Andreas Ronge

    Andreas Ronge November 4th, 2010 @ 09:39 PM

    • State changed from “new” to “hold”
    • Milestone order changed from “0” to “0”

    Hmm, maybe this is still a good idea. But this ticked on hold for the moment.

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Neo4j.rb is a graph database framework for JRuby.

It provides:

* Mapping of ruby objects to nodes in networks rather than in tables.
* Storage of ruby object to a file system.
* Fast traversal of relationships between nodes in a hugh node space.
* Transaction with rollbacks support.
* Indexing and quering of ruby objects.
* Integration with Rails

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