Dgraph-js get mutation result from transaction

Awoogamuffin · November 14, 2018, 6:34pm

I’m happily able to perform mutations through dgraph-js, but I’d like to get the response after adding a new node (in particular the generated uid). Where and how am I supposed to do this?

        const txn = this.dgraphClient.newTxn();
        try {
            const mu: Mutation = new dgraph.Mutation();
            mu.setSetJson(data);
            await txn.mutate(mu);
            await txn.commit();
            console.log(txn);
        } catch(e) {
            console.log(e);
        } finally {
            await txn.discard();
        }

MichelDiz · November 14, 2018, 6:52pm

Hey, try
getUidsMap()

update: Here a example

github.com

dgraph-io/dgraph-js/blob/18fa97c66bf9a2c897bf77ded119c1d1cb79333e/examples/simple/index-pre-v7.6.js#L83


return txn.mutate(mu).then((res) => {
    assigned = res;

    // Commit transaction.
    return txn.commit();
}).then(() => {
    // Get uid of the outermost object (person named "Alice").
    // Assigned#getUidsMap() returns a map from blank node names to uids.
    // For a json mutation, blank node names "blank-0", "blank-1", ... are used
    // for all the created nodes.
    console.log(`Created person named "Alice" with uid = ${assigned.getUidsMap().get("blank-0")}\n`);

    console.log("All created nodes (map from blank node names to uids):");
    assigned.getUidsMap().forEach((uid, key) => console.log(`${key}: ${uid}`));
    console.log();
}).catch((e) => {
    err = e;
}).then(() => {
    return txn.discard();
}).then(() => {
    if (err != null) {

Other example

github.com

dgraph-io/dgraph-js/blob/18fa97c66bf9a2c897bf77ded119c1d1cb79333e/tests/integration/bank.spec.ts#L38


            bal: initialBalance,
        });
    }

    const txn = client.newTxn();
    const mu = new dgraph.Mutation();
    mu.setSetJson(accounts);
    const ag = await txn.mutate(mu);
    await txn.commit();

    ag.getUidsMap().forEach((value: string): void => {
        uids.push(value);
    });
}

let startStatus = 0; // set before Promise.all
let cancelled = false;
let finished = false;

let runs = 0;
let aborts = 0;

Awoogamuffin · November 14, 2018, 7:16pm

Oh my god how did I miss that? I think I need some sleep. Thanks again michel

system · December 14, 2018, 7:16pm

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Dgraph-js get mutation result from transaction

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