-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Wichert Akkerman wrote: > I have a use case where I need to put additional restrictions on object > creation, in particular I need to restrict the maximum depth of items > inside of a container of a specific type. The ideal place to put such a > restriction seems to be the isConstructionAllowed method on the FTI. > Currently this method is not very extensible, which leads to complicated > code in various FTI types. > > I am considering to add an extension point here, something like this: > > class ITypeConstructionFilter(Interface): > def __init__(fti, container): > """Adapt on the FTI of the object being created and the target > container""" > > def allowed(): > """Check if construction is allowed.""" > > > current checks such as the workflow check that was added in CMF 2.2, or > the type constraint logic Plone has in ATContentTypes could be moved to > such an adapter. The standard isConstructionAllowed method could then > query all registered adapters to check if construction should be possible. > > Does this sound sensible?
I'm not sure about querying all adapters: I think it would be clearer to query the one adapter whose name corresponds to the type name of the FTI (the "query all" case leads to tricky / emergent behavior). Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 tsea...@palladion.com Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFKH+mA+gerLs4ltQ4RAhG7AKDZsLKNRVUHBfLoq/tbGsqU50TVJgCgr3Np 06Ck6T4Xyvru7WKgm8vUjbs= =2I0k -----END PGP SIGNATURE----- _______________________________________________ Zope-CMF maillist - Zope-CMF@lists.zope.org http://mail.zope.org/mailman/listinfo/zope-cmf See https://bugs.launchpad.net/zope-cmf/ for bug reports and feature requests