Tips for eliminating objects with a sessionID:null value from the nested array within an array of objects using JavaScript

[
    {
        "_id": "5ecda7f5310bee6f4b845add",
        "firstname": "john",
        "lastname": "smith",
        "sessions": [
            {
                "_id": "5efc724e46d8330a449e7111",
                "sessionID": null
            },
            {
                "_id": "5efffea946d8330a449e7133",
                "sessionID": null
            }
        ]
    },
    {
        "_id": "5ecef2db7aa45475d94291ad",
        "firstname": "lisa",
        "lastname": "jones",
        "sessions": [
            {
                "_id": "5efc735746d8330a449e7115",
                "sessionID": null
            }
        ]
    },
    {
        "_id": "5ebde0479abcf021acdeb661",
        "firstname": "Emily",
        "lastname": "Brown",
        "sessions": [
            {
                "_id": "5efd8c59489cee59cc685ed4",
                "sessionID": null
            },
            {
                "_id": "5efe05509bb1fc4338fd547a",
                "sessionID": null
            }
        ]
    },
    {
        "_id": "5eddc95537060af47cd90790",
        "sessions": [],
        "firstname": "Michael",
        "lastname": "Johnson"
    }
]
javascriptarraysjsonmongodbobject

Answer №1

You should iterate through your array and remove any sessions that have a null value

let startingArray = [
    {
        "_id": "5edfb4e587a1873120735dcf",
        "firstname": "abc",
        "lastname": "abc",
        "sessions": [
            {
                "_id": "5efc68d146d8330a449e7108",
                "sessionID": null
            },
            {
                "_id": "5efc68e646d8330a449e710a",
                "sessionID": null
            }
        ]
    },
    .... the remaining parts of your original object
]

let newArray = startingArray.map(item => {
    let sessions = item.sessions.filter(session => {
        return session.sessionID !== null
    })

    return {
        ...item,
        sessions
    }
})

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