This is in fact how the built-in URI generation policy "counter" is
implemented. Open teamwork.ui.ttlx and go to
teamwork:IncrementCounterEditRule
The main difference is that we store this "counter" in the TCH graphs.
Holger
On 2021-03-17 10:49 pm, David Price wrote:
Hi Maja,
There may be other ways, but you can do this kind of thing with an EDG
Edit Rule as code. An Edit Rule can access the changes graph via a
special graph called ui:addedGraph (ui:deletedGraph is also available)
and find new instances being created and then search the current graph
data for the max existing value and just add one. Something like this
should be close and search for that property in any new instance of
any class:
property-rules:Set_autoIncrementID
a teamwork:EditRule ;
teamwork:ruleMayUpdate true ;
ui:prototype """
<ui:forEach ui:resultSet=\"{#
SELECT DISTINCT ?i ?class
WHERE {
GRAPH ui:addedGraph {
?i a ?class .
FILTER NOT EXISTS {
?i myschema:autoIncrementID ?currentvalue .
} .
} .
} }\">
<ui:update ui:updateQuery=\"{!
INSERT {
?i myschema:autoIncrementID ?nextvalue .
}
WHERE {
GRAPH ui:addedGraph {
?i a ?class .
} .
{
SELECT (MAX(?num) AS ?maxvalue)
WHERE {
?noti a ?class .
?noti myschema:autoIncrementID ?id .
BIND (ceil(xsd:decimal(?id)) AS ?num) .
FILTER bound(?num) .
}
} .
BIND (COALESCE((xsd:integer(?maxvalue) + 1), 1) AS
?nextvalue) .
} }\"/>
</ui:forEach>
"""^^ui:Literal ;
rdfs:comment "When creating a new thing set the autoIncrementID
property value to be the next highest interger value" ;
rdfs:label "Default autoIncrementID" ;
rdfs:subClassOf teamwork:EditRules ;
.
Cheers,
David
On 17 Mar 2021, at 12:09, majaCap <[email protected]
<mailto:[email protected]>> wrote:
Hi,
I have an int property in my ontology. Now, I would like to increment
that property each time a new instance of a class is created,
starting from a particular number. How would I approach this in EDG?
Let's say the class instance is Animal with property
*autoIncrementID*. Each time I create a new Animal I would like the
*autoIncrementID *to be incremented by 1.
Br,
Maja
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