Grakn with Node.js: Match query - example #3

phone_calls_query_3.js

const Grakn = require("grakn");
const grakn = new Grakn("localhost:48555");
const session = grakn.session("phone_calls");

ExecuteMatchQuery();

async function ExecuteMatchQuery() {
  const tx = await session.transaction(Grakn.txType.READ);

  let query = [
    "match ",
    "  $common-contact isa person has phone-number $phone-number;",
    '  $customer-a isa person has phone-number "+7 171 898 0853";',
    '  $customer-b isa person has phone-number "+370 351 224 5176";',
    "  (caller: $customer-a, callee: $common-contact) isa call;",
    "  (caller: $customer-b, callee: $common-contact) isa call;",
    "get $phone-number;"
  ];

  console.log("\nQuery:\n", query.join("\n"));
  query = query.join("");

  const iterator = await tx.query(query);
  const answers = await iterator.collect();
  const result = await Promise.all(
    answers.map(answer =>
      answer
        .map()
        .get("phone-number")
        .value()
    )
  );
  
  console.log("\nResult:\n", result);
  
  await session.close();
  process.exit();
}