[Zope-CMF] Re: Recipe for ReadConflictError hell

[Florent Guillaume]

Chris Withers  <chris at simplistix.co.uk> wrote:
> Dieter Maurer wrote:
> >   I found out that the "_v_eek" attribute
> >   (from "OFS.SimpleItem.SimpleItem.raise_standardErrorMessage")
> >   were written through the surrogate into the underlying
> >   "FSDirectoryView" object: The "__setattr__" of
> >   "DirectoryViewSurrogate" writes to both the surrogate
> >   and the "FSDirectoryView" itself. This caused very
> >   strange error handling behaviour for us (fixed
> >   by defining a "__delattr__" along the same line as "__setattr__").
> >
> > This behaviour of surrogates means that one must use "_v_" variables
> > to avoid ZODB writes even though the surrogates themselves are not persistent.
> 
> Hmm, okay, but _v_eek is a _v_ attribute, so what's the problem here?
> Regardless, has this been submitted as a bug anywhere?

I just did because I want to look at this.
http://zope.org/Collectors/CMF/316

Florent

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Florent Guillaume, Nuxeo (Paris, France)   CTO, Director of R&D
+33 1 40 33 71 59   http://nuxeo.com   fg at nuxeo.com