Implementation notes

Version: $Revision$

[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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