Using "@container" : "@type"

[saumier]

Using "@container" : "@type" when Framing JSON-LD fails when @type is missing.

Test

Graph

{
  "@context": {
    "@vocab": "http://schema.org/"
  },
  "@type": "Event",
  "location": {
    "@id": "http://kg.artsdata.ca/resource/K11-200"
  }
}

Frame

{
  "@context": {
    "@vocab": "http://schema.org/",
    "location": {
      "@type": "@id",
      "@container": "@type"
    }
  },
  "@type": "Event"
}

Expected behaviour

"@none" when there is no @type.

Result from JSON-LD Playground

{
  "@context": {
    "@vocab": "http://schema.org/",
    "location": {
      "@type": "@id",
      "@container": "@type"
    }
  },
  "@type": "Event",
  "location": {
    "@none": "http://kg.artsdata.ca/resource/K11-200"
  }
}

Current behaviour

NoMethodError: undefined method `keys' for "http://kg.artsdata.ca/resource/K11-200":String
if compacted_item.keys.length == 1 && expanded_item.keys.include?('@id')