Re: [SQLObject] Reimplements the constructor...

[<mic...@ya...>]

Hi Luke!

> I may be misunderstanding you, is article.title a ForeignKey to title
> that may
> be NULL (when the title comes from article.section)? If so, from a
> database
> perspective I would not duplicate the data to set article.title =
> article.section.title. If section.title changes, then you need more
> application code to correctly update the article title, etc.
> 
> Instead, transparently retrieve the section's title if the article
> has no
> title:

Hugh, oh yeah, I done something with my idea, but your idea is better,
maybe :) I coding a system to store and search my country laws, see,
the tree can be:

- law
  - title
    - section
      - subsection
        - article

or only:

- law
  - title
    - article

I done some code, and it´s working for me, look:

class Container:
  def createParentObjects(self, kw):
    _containers=['law', 'title', 'section', 'subsection', 'article']
    class_name=self.__class__.__name__.lower()
    index=_containers.index(class_name)
    containers=_containers[:index]
    # first i count how many containers was passed to the constructor
    l=[kw.has_key(x) for x in containers]
    if l.count(1)!=1:
      raise TypeError, 'You can pass only one container!'
    index=l.index(1) # there is only one index to element 1
    key=containers[index]
    # then I create the antecessors
    for container in containers[:index]:
      kw[container]=kw[key].__getattribute__(container)
    return kw

class Title(SQLObject, SubContainer):
  ...
  def __init__(self, **kw):
    SQLObject.__init__(self, **self.createParentObjects(kw))

This way I don´t need to rewrite all the constructors with the same
code, but I have the problem that I can´t change the article´s place...
I will try to implement a way using the _get_attribute idea...

thanks for all help :)

=====
--
Michel Thadeu Sabchuk
Curitiba/PR


	
	
		
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