Dax wrote: > Thanks a lot, Mats. This is a way to do it, but if I were to add a > "name" schema to IMark and checkName on the actual "name", then I > would not be able to do this for "url" as well, right? So my question > is how would I do this for url without having url as the name for the > Mark object?
You should have a look at formlib/form.txt. See section Invariants. Jürgen > > On 3/15/06, Mats Nordgren <[EMAIL PROTECTED]> wrote: >> This could be done by using the URL as the name for the Mark object. >> >> from zope.app.container.contained import NameChooser >> >> Class MarkNameChooser(NameChooser): >> def chooseName(self, name, object): >> name = object.url >> self.checkName(name, object) >> return name >> >> <adapter >> for=".interfaces.IMarkContainer" >> provides="zope.app.container.interfaces.INameChooser" >> factory=".bookmarks.MarkNameChooser" /> >> >> Make sure your Mark object is configured with set_before_add >> >> <addform >> ... >> set_before_add="url" /> >> >> >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >> Behalf Of Dax >> Sent: Tuesday, March 14, 2006 8:00 PM >> To: zope3-users@zope.org >> Subject: [Zope3-Users] Prevent Duplicate Persistency >> >> For the following example (taken from "Zope3 In 30 Minutes"): >> >> class IMark(Interface): >> """This is the book mark object.""" >> >> url = TextLine( >> title=u"URL/Link", >> description=u"URL of the website", >> default=u"http://www.zope.org", >> required=True) >> >> description = Text( >> title=u"Description", >> description=u"Description of the website", >> default=u"", >> required=False) >> >> How can I prevent Mark objects from having the same url? So if a Mark >> object exists in BookMarker with Mark.url="http://www.zope.org/", how >> can I prevent another Mark object from being added when its url is >> "http://www.zope.org"? >> >> Thanks. >> _______________________________________________ >> Zope3-users mailing list >> Zope3-users@zope.org >> http://mail.zope.org/mailman/listinfo/zope3-users >> >> -- --------------------------------------------------- Jürgen Kartnaller mailto:juergen_at_kartnaller.at http://www.kartnaller.at http://www.mcb-bregenz.at --------------------------------------------------- _______________________________________________ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users