Apache TinkerPop•11mo ago

Is the following use of next() allowed?

The update does not seem to work in this case, even when changes is a non-empty object. No error is raised, and when I printed the result, it has { value : null, done : true }.

    
    const changes = { ... }
    let v0 = g.V(0);
    if (!(await v0.next()).value) {
        throw Error("Vertex not found.")
    }
    for (const [key, value] of Object.entries(changes)) {
        v0 = v0.property(key, value);
    }
    await v0.next();

    
    const changes = { ... }
    let v0 = g.V(0);
    if (!(await v0.next()).value) {
        throw Error("Vertex not found.")
    }
    for (const [key, value] of Object.entries(changes)) {
        v0 = v0.property(key, value);
    }
    await v0.next();

Solution:

It turns out, no, that's not allowed. It seems like done: true signifies that the traversal sequence was already committed and I'm doing basically nothing.

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2 Replies

Solution

tobaseru•11mo ago

It turns out, no, that's not allowed. It seems like done: true signifies that the traversal sequence was already committed and I'm doing basically nothing.

tobaseru•11mo ago

Commenting out the first next() allowed the second to work.

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Is the following use of next() allowed?