Re: [Modeling-users] Request for testers: dynamic creation of classes from a model

[Sebastien B. <sbi...@us...>]

        Hi all,

  I've just uploaded a new patch for the new dynamic feature
https://sf.net/tracker/index.php?func=3Ddetail&aid=3D814055&group_id=3D5893=
5&atid=3D489337

  Changes are:

    - run.py testsuite has been fixed and should pass now,

    - dynamic.build() can now also add properties to the generated
      classes (when parameter define_properties is true). Hence tests
      have a new option -C ("classic" build w/ properties)

    - toMany relationships are initialized with () (empty tuple) instead
      of [] (empty list).

Note on properties: while attributes are well handled, they can be
dangerous for relationships when they are stored as list instead of
tuples. For example, in the current version, author.books=3D[] is
correctly handled, but author.books.append(new_book) isn't: it does not
mark the object as modified, since author.willChange() is not
called. For those who know zodb, the ZODB.Persistent class has the same
problem in this case, and _p_changed should be manually set to 1.

  It is not clear to me whether a special proxy-class (deriving from
  types.ListType) should be specially designed for handling
  modifications of lists for relationships. BTW if you store
  relationships as tuples, not lists, then the problem disappears.

-- S=E9bastien.