how to setup a local fuseki server ?

[scenaristeur]

i've tried to setup a fuseki local server with

{
  "@context": "https://linkedsoftwaredependencies.org/bundles/npm/@ldf/server/^3.0.0/components/context.jsonld",
  "@id": "urn:ldf-server:my",
  "import": "preset-qpf:config-defaults.json",

  "title": "My Linked Data Fragments server",

  "datasources": [
    {
      "@id": "ex:mySparqlLocal",
      "@type": "SparqlDatasource",
      "datasourceTitle": "Fuseki Local",
      "description": "Fuseki Local",
      "datasourcePath": "fuseki-local-sparql",
      "sparqlEndpoint": "http://localhost:3030/pizza/sparql"
    },
    {
      "@id": "ex:mySparqlDatasource",
      "@type": "SparqlDatasource",
      "datasourceTitle": "DBpedia (Virtuoso)",
      "description": "DBpedia with a Virtuoso back-end",
      "datasourcePath": "dbpedia-sparql",
      "sparqlEndpoint": "https://dbpedia.org/sparql"
    }
  ]
}

with a pizza dataset imported from pizza.ttl

but i got no matches on ldf- server

[rubensworks]

Not sure why that wouldn't work.

Can you query http://localhost:3030/pizza/sparql with other tools?

Do you see any error messages in the LDF server logs?

Do you see any incoming requests in Fuseki?

[scenaristeur]

querying through webbrowser with http://localhost:3030/pizza/sparql?query=%0A%0ASELECT+%3Fsubject+%3Fpredicate+%3Fobject%0AWHERE+{%0A++%3Fsubject+%3Fpredicate+%3Fobject%0A}%0ALIMIT+25
seems ok

[scenaristeur]

there is something wrong with the "ex": preefix, i thing

smag@smagthink:~/dev/neurones/server$ ldf-server config_fuseki_only.json 5000 4
2022-01-04T16:00:32.811Z [Components.js] warn: Detected potentially invalid IRI 'ex:mySparqlLocal' in config_fuseki_only.json
2022-01-04T16:00:32.812Z [Components.js] warn: Detected potentially invalid IRI 'ex:mySparqlLocal' in config_fuseki_only.json
2022-01-04T16:00:32.813Z [Components.js] warn: Detected potentially invalid IRI 'ex:mySparqlLocal' in config_fuseki_only.json
2022-01-04T16:00:32.813Z [Components.js] warn: Detected potentially invalid IRI 'ex:mySparqlLocal' in config_fuseki_only.json
2022-01-04T16:00:32.813Z [Components.js] warn: Detected potentially invalid IRI 'ex:mySparqlLocal' in config_fuseki_only.json
2022-01-04T16:00:32.813Z [Components.js] warn: Detected potentially invalid IRI 'ex:mySparqlLocal' in config_fuseki_only.json
Master 75432 running.

removing it give me no more error

{
  "@context": "https://linkedsoftwaredependencies.org/bundles/npm/@ldf/server/^3.0.0/components/context.jsonld",
  "@id": "urn:ldf-server:my",
  "import": "preset-qpf:config-defaults.json",

  "title": "Fuseki only",

  "datasources": [
    {
      "@id": "mySparqlLocal",
      "@type": "SparqlDatasource",
      "datasourceTitle": "Fuseki Local",
      "description": "Fuseki Local",
      "datasourcePath": "fuseki-local-sparql",
      "sparqlEndpoint": "http://localhost:3030/pizza/sparql"
    }
  ]
}

but even no matches

Matches in Fuseki Local for { ?s ?p ?o ?g. }

Fuseki Local has no matches for this pattern.

[rubensworks]

And what about Fuseki's logs?

[Skriptotajs]

I had the same issue. The query generated by LDF was for quads and returned empty results:
SELECT * WHERE {GRAPH ?g{?s ?p ?o}} LIMIT 100

I fixed it by settings quads to false in the config:

{
  "@context": "https://linkedsoftwaredependencies.org/bundles/npm/@ldf/server/^3.0.0/components/context.jsonld",
  "@id": "urn:ldf-server:my",
  "import": "preset-qpf:config-defaults.json",

  "title": "Fuseki only",

  "datasources": [
    {
      "@id": "mySparqlLocal",
      "@type": "SparqlDatasource",
      "datasourceTitle": "Fuseki Local",
      "description": "Fuseki Local",
      "datasourcePath": "fuseki-local-sparql",
      "sparqlEndpoint": "http://localhost:3030/pizza/sparql",
      "quads": false
    }
  ]
}