[Nepomuk] Re: How to read back the Nepomuk::Resource identifier

[Sebastian Trüg]

On 02/22/2011 04:19 PM, Christian Mollekopf wrote:
> On Tuesday 22 February 2011 15:40:53 Sebastian Trüg wrote:
>> Ok, correction: it is not ignored. It is used as nie:url. So if you use
>> "akonadi:?item=abc" as identifier in the Resource constructor you get a
>> new resource with a random URI and nie:url property set to the akonadi URI.
>>
> 
> I see, that works. That makes sense, but is not really predictable. I think 
> the constructor taking an url should behave this way, in case the url is not a 
> nepomuk:/ url. The constructor taking an identifier should really set the 
> identifier IMHO.

I agree. Once upon a time that was the way the system behaved. Then a
lot of things were changed, fixed, improved, and on the way this use
case got changed. Since there was no unit test for this special case we
did not catch it.
It's not clear yet how to fix it. Could you maybe create a bug report
for it?

Cheers,
Sebastian

> Cheers
> 
>> Cheers,
>> Sebastian
>>
>> On 02/22/2011 03:23 PM, Sebastian Trüg wrote:
>>> Hi Chris,
>>>
>>> I just realized that this is a bit of a bug. If an identifier has a
>>> schema, i.e. is a URI with a schema, it is more or less ignored. :(
>>> And since akonadi URIs have the akonadi: schema this could be the
>>> problem....
>>>
>>> I need to fix that somehow.
>>>
>>> Cheers,
>>> Sebastian
>>>
>>> On 02/22/2011 02:54 PM, Christian Mollekopf wrote:
>>>> On Tuesday 22 February 2011 14:41:39 Sebastian Trüg wrote:
>>>>> On 02/22/2011 01:05 PM, Christian Mollekopf wrote:
>>>>>> On Tuesday 22 February 2011 11:30:30 Sebastian Trüg wrote:
>>>>>>> That is weird indeed.
>>>>>>> Could you please do a kDebug() on the resource to see its details.
>>>>>>
>>>>>> What exactly would you like to see? (I can't just  print the whole
>>>>>> resource, or can I?)
>>>>>>
>>>>>> the identifiers part is just empty, directly on creation, or also when
>>>>>> loaded later on. The uri is also first empty, and later on when loaded
>>>>>> from storage a normal nepomuk:/ uri.
>>>>>>
>>>>>> I'd expect that when created like this:
>>>>>>
>>>>>> Nepomuk::Resource res(identifier,
>>>>>> Nepomuk::Vocabulary::NFO::HtmlDocument());
>>>>>
>>>>> is "identifier" a QString. Only then it would be used as identifier.
>>>>> Otherwise it would be used as nie:url I think...
>>>>
>>>> yes, identifier is a QString.
>>>>
>>>>>> res.identifiers() would return identifier, is that correct?
>>>>>>
>>>>>>> Cheers,
>>>>>>> Sebastian
>>>>>>>
>>>>>>> On 02/17/2011 05:41 PM, Christian Mollekopf wrote:
>>>>>>>> another question =)
>>>>>>>>
>>>>>>>> So far I created Nepomuk::Resources  for an Akonadi::Item using the
>>>>>>>> the url of the Akonadi::Item as identifier, which works well so
>>>>>>>> far.
>>>>>>>>
>>>>>>>> But now that I tried getting the Akonadi::Item url back from the
>>>>>>>> corresponding Nepomu::Resource, I realized that neither the uri nor
>>>>>>>> the indetifiers contain the Akonadi::Item url which was used to
>>>>>>>> create the Resource.
>>>>>>>>
>>>>>>>> In other words, using the same url as identifier always gives me the
>>>>>>>> same Resource, but I can't get that url back from the Resource. Is
>>>>>>>> that normal?
>>>>>>>>
>>>>>>>> And how should I work around this? By Adding the url as additional
>>>>>>>> Identifier?
>>>>>>>>
>>>>>>>> Cheers,
>>>>>>>>
>>>>>>>> Chris
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