javascript - 如何：将新的 json 内容添加到数组中遵循相同格式的预先存在的文件中

Question

我在服务器端使用 Node.js，并已将 json 对象从客户端传回服务器。我已将数据添加到预先存在的 gfile 的末尾，但我希望将数据添加到文件的电气Assest 部分下。

这是服务器端的 JSON 文件，我想将数据添加到其中。

{
"substation": [
    {
        "id": "1",
        "geoLocation": "-33.7490, 84.3880",
        "supportAssetTypes": [
            {
                "id": "cs-1",
                "type": "capacitorStructure",
                "specifications": {
                    "construction": "galvanized steel",
                    "capacity": {
                        "x": 10,
                        "y": 2,
                        "z": 5
                    }
                }
            }
        ],
        "electricalAssetTypes": [
            {
                "id": "siemens-c1",
                "type": "capacitor",
                "specifications": {
                    "manufacture": "siemens",
                    "model": "1234",
                    "shape": "box",
                    "technology": "internally fused",
                    "ratedVoltage": 15,
                    "frequency": [
                        50,
                        60
                    ],
                    "ratedPower": [
                        {
                            "kvar": 1000,
                            "frequency": 50
                        },
                        {
                            "kvar": 1200,
                            "frequency": 60
                        }
                    ],
                    "maxCurrent": "180",
                    "BIL": [
                        95,
                        125,
                        150,
                        170,
                        200
                    ],
                    "dielectric": "Polypropylene film and oil",
                    "impregnant": "Biodegradable PCB-free oil",
                    "dischargeResistor": [
                        "75 V/10 min",
                        "50 V/5 min"
                    ],
                    "losses": 0.2,
                    "temperatureRange": [
                        -50,
                        55
                    ]
                }
            }
        ],
        "supportAssets": [
            {
                "id": "struct121",
                "type": "cs-1",
                "location": {
                    "x": 1,
                    "y": 1,
                    "z": 1
                }
            }
        ],
        "electricalAssets": [
            {
                "id": "c1",
                "assetType": "siemens-c1",
                "radioChs": [
                    101
                ],
                "installation": {
                    "supportAssetId": "struct121",
                    "slot": {
                        "x":"1",
                        "y":"1",
                        "z":"1"
                      }
                },
                "mounting": "horizontal"
            },
            {
                "id": "c2",
                "assetType": "siemens-c1",
                "radioChs": [
                    102
                ],
                "installation": {
                    "supportAssetId": "struct121",
                    "slot": {
                      "x":"2",
                      "y":"1",
                      "z":"1"
                    }
                },
                "mounting": "horizontal"
            }
        ]
    }]}

这是调用将对象以长字符串添加到文件末尾的函数。

router.post('', function(req, res, next) {
const token = req.headers['authorization'];
//const secretOrKey = 'your_jwt_secret';
if (!token) {
    return res.status(401).send({auth: false, message: 'No token provided.'});
}

jwt.verify(token, 'your_jwt_secret', function(err, decoded) {
    if (err) {
        return res.status(401).send({auth: false, message: 'Failed to authenticate token.'});
    }
    else {
        if (decoded.role === 'admin' || decoded.role === 'engineer') {
            fs.readFile('configDB/configuration.json', (err, data) => {
                if (err) throw err;
                let json = JSON.parse(data);
                let object = JSON.stringify(req.body);
                //json.push('new capCan: ' + object);
                fs.appendFile("configDB/configuration.json", JSON.parse(JSON.stringify(object)), function(err){
                    if(err) throw err;
                    console.log(object);
                    res.send({ status: 'success'});
                });
            })
        }
        else {
            return res.status(500).send({admin: false, message: 'unauthorized to edit file'});
        }
    }
})

该代码现在可以工作，但只是在最后一个“}”之后将代码添加到文件的最后。我希望它以相同的格式位于electricalAssets 部分中。

标签： javascriptjsonnode.jsionic-frameworkfs