[topbraid-users] TBCME: Cannot write to a graph from an SWP

[Tim Smith]

Hi,

I cannot write to an existing graph in the workspace from an SWP.  This is
a problem that has plagued me since TBC 5.1.4 so perhaps I'm doing
something wrong.  I've attached a minimal example as a project.

The file, swp_write_to_graph.ui.ttlx contains a subclass of ui:Services
called w2g:w2graph.  In the ui:prototype, I populate a temp graph
(ui:tempGraphFinalOutput) with a single triple.  ui:prototype shown below.

Next, I dump the temp graph to a temporary file using ui:dumpGraph to
ensure ui:tempGraphFinalOutput contains the triple.  This works as
expected.  Then I try to insert the contents into an RDF file that exists
in the workspace.  This file contains nothing but the triples TBC creates
when a new RDF file is created.

The SWP call completes successfully but the single triple is not inserted
into the existing graph.

The SWP is called using:

http://localhost:8083/tbl/swp?_viewClass=w2g:w2graph&outputGraph=http://example.com/swp_write_to_graph_output&_contextdebug=true

What am I missing such that I cannot insert triples into existing graphs
from an SWP?

Note that my ultimate goal is to pass the name of the output graph into the
SWP so you will see a constraint setup for that purpose but it is not used
in this example.

Any help would be appreciated.  I need to create a number of SWPs and being
able to manipulate graphs at will is a skill I need.

Tim



<ui:group let:outputFileGraph="{= IRI(?outputGraph) }">
    <h3>The output graph is {= ?outputGraph }  Graph: {= ?outputFileGraph
}</h3>{= smf:trace("Populating the temp graph... ") }<ui:update
ui:updateQuery="{!
            INSERT {
                GRAPH ui:tempGraphFinalOutput {
                    ?uri rdfs:label &quot;I am a Thing&quot; .
                } .
            }
            WHERE {
                BIND (spif:buildURI(&quot;&lt;
http://example.com/{?1}&gt;&quot;, &quot;i_am_a_thing&quot;) AS ?uri) .
            } }"/>{= smf:trace("Finished!") }

{= smf:trace("Dumping to the debug graph...") }<ui:dumpGraph
ui:filePath="/SWP_Example/swp_write_to_graph_debug_output.ttl"
ui:graph="ui:tempGraphFinalOutput"/>
    <!-- Try to insert into the output graph -->{= smf:trace("Writing
output graph... ") }<ui:setContext ui:queryGraph="ui:tempGraphFinalOutput">
        <ui:update ui:updateQuery="{!
                INSERT {
                    GRAPH &lt;
http://example.com/swp_write_to_graph_output&gt; {
                        ?s ?p ?o .
                    } .
                }
                WHERE {
                    ?s ?p ?o .
                } }"/>
    </ui:setContext>
</ui:group>

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<<attachment: SWP_Example.zip>>