Hi all.
So I was sent a link to the instance and had a quick look and it was as I
suspected.
(here is my response with links removed..)
The JSON includes the following:
"P251": [
> {
> "rank": "normal",
> "mainsnak": {
> "snaktype": "value",
> "property": "P251",
> "datavalue": {
> "type": "wikibase-entityid",
> "value": {
> "entity-type": "item",
> "numeric-id": 85
> }
> },
> "datatype": "wikibase-item"
> },
> "type": "statement"
> }
> ],
Note that this is trying to use P251 as a 'wikibase-entityid'.
When looking at the property page http://SOMEHOST/index.php/Property:P251 you
can see that the datatype is listed as 'String'.
It was said in a previous email that P251 should refer to another item, in
which case this property has been created incorrectly!
When creating a property, for example on
http://SOMEHOST/index.php/Special:NewProperty
you can see that there is a 'data type' field. This allows you to select
the type of data to be stored!
This is also available through the API
You'll have to create a new property to replace P251 that uses and 'Item'
instead of 'String'
Addshore
On 11 August 2015 at 10:22, Addshore <[email protected]> wrote:
> Hi Bo!
>
> Would it be possible to get access / a URL to this test instance?
> Feel free to send it to me outside of this list (if possible)
>
> Addshore
>
> On 11 August 2015 at 08:05, Bo Ferri <[email protected]> wrote:
>
>> Hi Addshore,
>>
>> currently, I can't see what's wrong with the Statement with the property
>> P251. It should refer to another Item (which should be possible within the
>> Wikidata data model). This is the difference between all other Statements -
>> they simply refer to literal Values. I also had a look at the JSON
>> serialisation documentation. In the Snak section [1] I can find an example
>> that looks similar to mine (or maybe I'm blind and oversee something).
>> Furthermore, I'm serialising POJO objects from the Wikidata Toolkit (i.e. I
>> do not construct the JSON at my own). The Item that is the Value of this
>> Statement exists already in my Wikibase instance (all properties exists as
>> well).
>> We are running a nightly snapshot of MediaWiki (incl. Wikibase extension).
>>
>> Thanks a lot in advance for all your help.
>>
>> Cheers,
>>
>>
>> Bo/T
>>
>>
>> [1] https://www.mediawiki.org/wiki/Wikibase/DataModel/JSON#Snaks
>>
>>
>>
>> Quoting Addshore <[email protected]>:
>>
>> At a guess this is due to a miss match between the datavalue of a property
>>> and the datavalue that you are trying to set in a statement for that
>>> property.
>>>
>>> The error also says that it gets an array where it expects a string so I
>>> guess the issue is with P251 where the value is an array instead of a
>>> string!
>>>
>>> Could P251 possibly be a string?
>>>
>>> On 10 August 2015 at 14:25, Bo Ferri <[email protected]> wrote:
>>>
>>> Hi all,
>>>>
>>>> (apologies, if this is not the right place for raising the following
>>>> issue
>>>> (if this is the case, then please delegate me to a more appropriated
>>>> place
>>>> ;) ))
>>>>
>>>> we are currently evaluating Wikibase as storage for D:SWARM GDM data
>>>> (see
>>>> [1,2]). Right now, we have a prototype client [3] that makes use of a
>>>> Wikidata Toolkit fork [4]. So far, we were able to write/create simple
>>>> items and properties. However, we also would like to create new items
>>>> with
>>>> a given set of statements. Therefore, we intended to utilise the
>>>> 'wbeditentity' HTTP API (and I had (and still have) a lively
>>>> conversation
>>>> with Markus Krötzsch about this topic, see [5]). We get (a kind of) item
>>>> JSON serialisation (e.g. with help of JacksonObjectFactory-based
>>>> DatamodelConverter (Wikidata Toolkit code)). However, when sending this
>>>> to
>>>> the 'webeditentity' API we always receive an error response like this:
>>>>
>>>> "
>>>> {
>>>> "error": {
>>>> "code": "modification-failed",
>>>> "info": "array instead of string",
>>>> "messages": [
>>>> {
>>>> "name": "wikibase-validator-bad-type",
>>>> "parameters": [
>>>> "string",
>>>> "array"
>>>> ],
>>>> "html": {
>>>> "*": "array instead of string"
>>>> }
>>>> }
>>>> ],
>>>> "*": "See http://[OUR WIKIBASE SERVICE IP]/api.php for API usage"
>>>> }
>>>> }
>>>> "
>>>>
>>>> We cannot really interpret what's wrong with the data model that we send
>>>> to this API (note: we make use of the POJOs below
>>>> 'org.wikidata.wdtk.datamodel.json.jackson' package of Wikidata Toolkit,
>>>> see
>>>> [6]). An example of a data JSON is attached to this e-mail.
>>>>
>>>> Thanks a lot in advance for all your help.
>>>>
>>>> Cheers,
>>>>
>>>>
>>>> Bo/T
>>>>
>>>>
>>>> [1] http://dswarm.org
>>>> [2]
>>>> https://github.com/dswarm/dswarm-documentation/wiki/Graph-Data-Model
>>>> [3]
>>>>
>>>> https://github.com/zazi/wikidata-d-swarm-importer/tree/own_mediawiki_api_client
>>>> [4]
>>>>
>>>> https://github.com/zazi/Wikidata-Toolkit/tree/wikibase_api_write_modifications
>>>> [5] https://github.com/Wikidata/Wikidata-Toolkit/issues/162
>>>> [6]
>>>>
>>>> https://github.com/zazi/wikidata-d-swarm-importer/blob/own_mediawiki_api_client/src/main/java/org/dswarm/wikidataimporter/WikibaseAPIClient.java#L368
>>>>
>>>> _______________________________________________
>>>> Wikidata-tech mailing list
>>>> [email protected]
>>>> https://lists.wikimedia.org/mailman/listinfo/wikidata-tech
>>>>
>>>>
>>>>
>>>
>>> --
>>> Addshore
>>>
>>
>>
>>
>>
>> _______________________________________________
>> Wikidata-tech mailing list
>> [email protected]
>> https://lists.wikimedia.org/mailman/listinfo/wikidata-tech
>>
>
>
>
> --
> Addshore
>
--
Addshore
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