无法循环遍历 node.js 中的嵌套 object

Question

i am trying to loop through a nested object and save the data to my cloud firestore database but it is not working,

this is the structure of the object i have retrieved from an API call,

{
    "count": 133,
    "filters": {
        "dateFrom": "2021-04-12",
        "dateTo": "2021-04-22",
        "permission": "TIER_ONE"
    },
    "matches": [
        {
            "id": 304061,
            "competition": {
                "id": 2021,
                "name": "Premier League",
                "area": {
                    "name": "England",
                    "code": "ENG",
                    "ensignUrl": "https://upload.wikimedia.org/wikipedia/en/a/ae/Flag_of_the_United_Kingdom.svg"
                }
            },
            "season": {
                "id": 619,
                "startDate": "2020-09-12",
                "endDate": "2021-05-23",
                "currentMatchday": 31,
                "winner": null
            },
            "utcDate": "2021-04-12T17:00:00Z",
            "status": "SCHEDULED",
            "matchday": 31,
            "stage": "REGULAR_SEASON",
            "group": "Regular Season",
            "lastUpdated": "2021-04-12T16:51:35Z",
            "odds": {
                "homeWin": 3.43,
                "draw": 3.31,
                "awayWin": 2.15
            },
            "score": {
                "winner": null,
                "duration": "REGULAR",
                "fullTime": {
                    "homeTeam": null,
                    "awayTeam": null
                },
                "halfTime": {
                    "homeTeam": null,
                    "awayTeam": null
                },
                "extraTime": {
                    "homeTeam": null,
                    "awayTeam": null
                },
                "penalties": {
                    "homeTeam": null,
                    "awayTeam": null
                }
            },
            "homeTeam": {
                "id": 74,
                "name": "West Bromwich Albion FC"
            },
            "awayTeam": {
                "id": 340,
                "name": "Southampton FC"
            },
            "referees": [
                {
                    "id": 11430,
                    "name": "Simon Hooper",
                    "role": "MAIN_REFEREE",
                    "nationality": "England"
                },
                {
                    "id": 11570,
                    "name": "Harry Lennard",
                    "role": "ASSISTANT_N1",
                    "nationality": "England"
                },
                {
                    "id": 11505,
                    "name": "Derek Eaton",
                    "role": "ASSISTANT_N2",
                    "nationality": "England"
                },
                {
                    "id": 11585,
                    "name": "Craig Pawson",
                    "role": "FOURTH_OFFICIAL",
                    "nationality": "England"
                },
                {
                    "id": 11487,
                    "name": "Kevin Friend",
                    "role": "VIDEO_ASSISTANT_REFEREE",
                    "nationality": "England"
                }
            ]
        },
        {
            "id": 303253,
            "competition": {
                "id": 2002,
                "name": "Bundesliga",
                "area": {
                    "name": "Germany",
                    "code": "DEU",
                    "ensignUrl": "https://upload.wikimedia.org/wikipedia/commons/b/ba/Flag_of_Germany.svg"
                }
            },
            "season": {
                "id": 599,
                "startDate": "2020-09-18",
                "endDate": "2021-05-15",
                "currentMatchday": 28,
                "winner": null
            },
            "utcDate": "2021-04-12T18:30:00Z",
            "status": "SCHEDULED",
            "matchday": 28,
            "stage": "REGULAR_SEASON",
            "group": "Regular Season",
            "lastUpdated": "2021-04-12T14:42:35Z",
            "odds": {
                "homeWin": 2.8,
                "draw": 3.72,
                "awayWin": 2.36
            },
            "score": {
                "winner": null,
                "duration": "REGULAR",
                "fullTime": {
                    "homeTeam": null,
                    "awayTeam": null
                },
                "halfTime": {
                    "homeTeam": null,
                    "awayTeam": null
                },
                "extraTime": {
                    "homeTeam": null,
                    "awayTeam": null
                },
                "penalties": {
                    "homeTeam": null,
                    "awayTeam": null
                }
            },
            "homeTeam": {
                "id": 2,
                "name": "TSG 1899 Hoffenheim"
            },
            "awayTeam": {
                "id": 3,
                "name": "Bayer 04 Leverkusen"
            },
            "referees": []
        }]}

this is my attempt to loop through the matches section of my object, i want to be able to iterate through each match while still being able to access sub objects within each iteration and set data in my cloud firestore database

   axios.request(options).then(function(response) {



    //console.log(typeof response); // check the type of response returning already in JSON format
    //console.log(response); // check the response object and based on key/values process it 

    const data = response.data; // if resp contains the data you will get it here.


    //console.log(response.data);

    /* for (let data1 in data.pagination) {
       // from the sample response you shared in the question 
       console.log(data1) // prints the keys
       console.log(data.pagination.data1) // prints the values*/

    for (i = 0; i < data.count; i++) {

        // from the sample response you shared in the question 
        // console.log(index);
        // console.log(data.f[data1]) // prints the keys
        // //console.log(data.pagination.data1) // prints the values

        const soccerData = {
            name: `${data.matches[i].competition.name}`,
            id: `${data.matches[i].competition.id}`
        };
        return db.collection('matches').doc(`${data.matches[i].id}`)
            .set(soccerData).then(() =>
                console.log('data written to database'));




    }


}).catch(function(error) {
    console.error(error);
});
 

Answer 1

To loop over matches use:

 response.data.matches.forEach(match => { // do something with the match } )

Instead of the for loop. You can then do

 const soccerData = { name: `${match.competition.name}`, id: `${match.competition.id}` }

and also:

 return db.collection('matches').doc(`${match.id}`).set(soccerData).then(() => console.log('data written to database'));