Tickets :: Comment on [#12516] CardDav attribute value delete

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Comment	> The proposed patch in comment #3 has got a big downside, as it will > always delete values from all fields that cannot be set via CardDAV. > For example, if you were to change a contact's first name via CardDAV > with the patch from comment #3 applied, changing the name would > inadvertently delete the values stored in the "Assistent's phone > number" field (assistPhone), or carPhone, or may others. This would > cause trouble on a shared calendar where one user uses Turba's web > interface only and another uses CardDAV, at the very least. Like Jan > pointed out, this could only work if all fields from Turba were > exposed via CardDAV. > > While allowing all fields to be exported and re-set via CardDAV is > another story altogether, there is something that can be done with > little effort: Keep values of non-CardDAV-exported fields unchanged > (like is now) but allow other fields to be deleted. > > So for the time being, I created a patch where only those fields can > be deleted via CardDAV that are currently seen when using CardDAV. > While this does not address the problem that CardDAV clients may be > dropping attributes unknown to them and those attributes in turn > disappear in Turba, it does, however, hinder CardDAV users from > unwillingly deleting values they have never seen. The fact of not > being able to delete _any_ value is a big problem on our site, as > people cannot remove any outdated information from a contact via > CardDAV as of now. > > Of course, this proposed patch has a downside, too: Users might still > be expecting to be able to see and alter information via CardDAV in > any field they see via the web interface, and even with this patch, > they still see only some of this information. If they "clean out" a > contact via CardDAV, there might be more stuff remaining than they > think.
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