Relations battle plan

The battle plan for implementing relations in drupal in no particular order.

  • framework
    • relations hook
    • composition
    • intersection
    • exclusion
    • relation node type
    • integration with listings api of cck fame
  • data model
    • adjacency lists
    • trees
    • term
    • user
  • user interface
    • add relation between two things
    • add to tree
    • query builder
      • composition
      • exclusion
      • intersection

Some remarks

* relations hooks
* trees: can vauxia help here?
* Term: do we need to bether about taxonomy yet? Should we not ignore that for the time being?

re: remarks

hooks - possibly yes, it is a matter of splitting the functionality. I can see the biggest split in execute a relation query and give back the result in a consistent form and get some data to build queries from. Both should be available. The first for speed, the second for extensibility.

trees - vauxia's code will help. I've actually used it, with some extensions, mainly for INSERTs, so we can postpone reindexing.

term - well, it is a good example for a complex relation in Drupal - it is more node->terms->node. What I meant is find related nodes by taking into account which terms they are tagged with.

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