bencripps / react-redux-grid

src/util/getTreePathFromId.js

export const getTreePathFromId = (flatData, id) => {
    const res = [];
    const node = flatData.find(n => n.get('_id') === id);

    let lastParentId = node.get('_id');

    while (lastParentId !== undefined) {
        const parent = flatData.find(n => n.get('_id') === lastParentId);

The variable lastParentId is changed as part of the while loop for example by parent.get("_parentId") on line 12. Only the value of the last iteration will be visible in this function if it is called after the loop.

        if (parent) {
            res.push(parent.get('_id'));
            lastParentId = parent.get('_parentId');
        }

        else {
            lastParentId = undefined;
        }
    }

    return res.reverse();
};