Am 12.04.2009 um 15:12 schrieb Michael Howitz: > Hi, > > I'm using a trunk version of z3c.form and have the following > situation: > In my interface I have a zope.schema.Bytes field. > z3c.form.converter.FileUploadDataConverter.toFieldValue returns > z3c.form.interfaces.NOT_CHANGED when I do not upload a file. > z3c.form.validator.SimpleFieldValidator.validate fails later on as the > value (z3c.form.interfaces.NOT_CHANGED) is not of type str (which is > required by the Bytes field). > I created a branch in svn to show the behavior. (z3c.form/branches/ > icemac_validate_NOT_CHANGED) > > I'm not sure how to fix this generally, some possible solutions come > to my mind, but each idea has its own problems: > > 1) Create a special validator for zope.schema.Bytes + > z3c.form.interfaces.IFileWidget which knows how to handle NOT_CHANGED. > This does not seem to be a really general solution and might have > the same problems like the following ideas. > > 2) When z3c.form.validator.SimpleFieldValidator.validate is called > with NOT_CHANGED as value, try to look up the value on the context > object. > This fails on AddForms as the context there is the parent object. > > 3) When z3c.form.validator.SimpleFieldValidator.validate is called > with NOT_CHANGED as value, do not validate hoping the previous value > was valid. > This approach fails with AddForms, too, when the Bytes field is > required. (The missing-value-error does not get raised.) > > Anyone having an idea for a possibly working solution?
As I got no responsed, I'd like to put this issue into z3c.form's bugtracker. But which is the correct one? https://bugs.launchpad.net/zope3/ ? Yours sincerely, -- Michael Howitz · [email protected] · software developer gocept gmbh & co. kg · forsterstraße 29 · 06112 halle (saale) · germany http://gocept.com · tel +49 345 1229889 8 · fax +49 345 1229889 1 Zope and Plone consulting and development _______________________________________________ Zope-Dev maillist - [email protected] http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
