# Implementation notes

Version: | 1.6

[see also the roundup package docstring]

There have been some modifications to the spec. I've marked these in the source with 'XXX' comments when I remember to.

In short:

  Class.find() - may match multiple properties, uses keyword args.

  Class.filter() - isn't in the spec and it's very useful to have at the
    Class level.
  CGI interface index view specifier layout part - lose the '+' from the
    sorting arguments (it's a reserved URL character ;). Just made no prefix mean ascending and '-' prefix descending.
  ItemClass - renamed to IssueClass to better match it only having one
    hypderdb class "issue". Allowing > 1 hyperdb class breaks the "superseder" multilink (since it can only link to one thing, and we'd want bugs to link to support and vice-versa).
  template - the call="link()" is handled by special-case mechanisms in
    my top-level CGI handler. In a nutshell, the handler looks for a method on itself called 'index%s' or 'item%s' where %s is a class. Most items pass on to the templating mechanism, but the file class _always_ does downloading. It'll probably stay this way too...
  template - call="link(property)" may be used to link "the current item"
    (from an index) - the link text is the property specified.
  template - added functions that I found very useful: List, History and
    Submit.
  template - items must specify the message lists, history, etc. Having
    them by default was sometimes not wanted.
  template - index view determines its default columns from the
    template's `tal:condition="request/show/<property>"` directives.

  template - menu() and field() look awfully similar now .... ;)

  roundup_admin.py - the command-line tool has a lot more commands at its
    disposal

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