[Zope] Re: ZDatabaseTool - does this still exist?

Dieter Maurer dieter at handshake.de
Thu Aug 11 14:30:37 EDT 2005


michael nt milne wrote at 2005-8-11 10:01 -0400:
>It doesn't to be a relational db to be able to easily add fields

There are no tables to add fields to.

As someone else already pointed out:

  Zope objects often use so called properties
  as "field" emulation.

  Unlike for a relational database where you
  specify the fields of a table (and all rows inherit these fields),
  properties are on individual objects (which are somehow like rows).

  Zope has a feature where you can define properties not
  for individual objects but for whole collections of them:
  "ZClass"es. Adding properties to a property sheet of
  a ZClass ensures that all instances of the class have
  these properties (with the default value defined by the class).

-- 
Dieter


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