Okay, if you know the UID. And always will. You just have to do
RDF Mutation
<0x1> <linkTo> <0x2> .
JSON Mutation
{
"set": [
{
"uid": "0x1",
"linkTo": [
{
"uid": "0x2"
}
]
}
]
}
That’s it.
See the doc share by Raphael https://dgraph.io/docs/mutations/json-mutation-format/
I don’t get your question. If you do a query, you know what you are looking for. And what to extract. It can have N fields.