Re: set() and get() of IField ignored in Dexterity?

Johannes Raggam wrote:
> On Mon, 2014-12-01 at 13:42 +0100, Andreas Jung wrote:
>> David Glick (Plone) wrote:
>>> On 11/30/14, 9:39 AM, Andreas Jung wrote:
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>>>> I implemented an XML field for Dexterity
>>>>
>>>> https://bitbucket.org/onkopedia/zopyx.existdb/src/438c6daa6bf3f5ac0c0a08b602e1f9927ead058a/zopyx/existdb/dx/fields.py?at=dexterity
>>>>
>>>> which is working nicely with plone.schemaeditor.
>>>>
>>>> However: the set() and get() methods are completely
>>>> ignored. Is there something in Dexterity by-passing
>>>> these methods?
>>>>
>>>> - -aj
>>>>
>>> The default z3c.form data manager is z3c.form.datamanager.AttributeField 
>>> which just does setattr and getattr on the (possibly adapted) context. 
>>> If you want the field's get/set to be used, you'll either have to write 
>>> a custom data manager for your field, or use a custom content item class 
>>> that uses property descriptors.
>> This is perhaps an option when you define your content-types in Python
>> code but completely unusable for TTW content-types.
> 
> The data manager would adapt a generic context and your specific field.
> So, if you create this data-manager and create a TTW content type using
> this field, it should use your data manager.

I am using a custom data manager right now and this should work fine (in
fact it does work fine with my prototype) for both content-types create
TTW or programmatically. I am more concerned we now have a third
(necessary) way for dealing with get/set operations where the storage
handling can not be implemented through a behavior but instead on the
field level or in this case through the data manager (which belong
to the z3c.form widget level) on the completely improper framework
level. I am not opening a new discussion here but I just need to mention
that the set/get implementation in Dexterity is even more flawed that
I first thought. I can deal with this on the application level...so
don't fear a further shit storm from my side :-P

Andreas


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