Checking if a value exists in a Record

[legraphista]

There is no "proper" way to check if a value exists or not in a Record without trying to access and catching for errors.

Take this oversimplified example:

const queries = [
   'MATCH (a:Apple) RETURN COUNT(a) AS apples' ,
   'MATCH (a:Apple), (o:Orange) RETURN COUNT(a) AS apples, COUNT(o) AS oranges'
];

const query = queries[Math.random() > .5 ? 1 : 0];

session.run(query).then((data) => {
    console.log(data[0].get('apples'));

    // will throw if first query is chosen
    console.log(data[0].get('oranges')); 
});

There should be a way of checking for fields before trying to use them:

session.run(query).then((data) => {
    console.log(data[0].get('apples'));

    // will throw if first query is chosen
    if(data[0].has('oranges')) {
        console.log(data[0].get('oranges')); 
    }
});

[legraphista]

I've made a pull request with the necessary code and tests to implement Record.has(key) here #83

[pontusmelke]

I agree this is missing in the driver, and I am happy to use your PR.