Question

我有以下架构

    var RaceSchema = new Schema({
    account: {
        _id: String,
    name: String,
    country: String
    },
    raceName:  String,
    raceStartTime: Date,
    timezone: Number,
    trackTimeStart: Date,
    trackTimeFinish: Date,
    sponserImageURL: Array,     
    map: {
        center: Array,
        course: Object,
        zoomLevel: Number
    },
    boats: [{
            _id: String,
            handicaps: [{                   
                                name: String,
                    division: Number,
                    rating: Number,
                    correctedTime: Number,
                    place: Number
                            }]
    }],
    dtg: Number,
    eta: Date,
    finishTime: Date,
    socialMedia: [{
                    name: String,
                    link: String
    }],
    createdAt: { type: Date, default: new Date },
    updatedAt: Date
}, {
    collection: 'race'
});

我用它来存储GeoJson数据以及架构中显示的其他一些信息。我以下列格式保存数据（它是我在保存时从服务器获得的响应）

{
    "_id": "562bc48bfde8999f2995e61d",
    "raceStartTime": "2015-10-29T17:48:00.000Z",
    "trackTimeStart": "2015-10-24T17:48:00.000Z",
    "trackTimeFinish": "2015-10-24T17:48:00.000Z",
    "raceName": "Test ",
    "timezone": -4.5,
    "__v": 1,
    "updatedAt": "2015-10-24T17:49:16.912Z",
    "createdAt": "2015-10-24T17:39:45.587Z",
    "socialMedia": [],
    "boats": [{
        "_id": "55f6c2d39a2496d01d000002",
        "handicaps": []
    }],
    "map": {
        "center": [78.4651562, 17.4079808],
        "course": "{\"type\":\"LineString\",\"coordinates\":[[8639830.18113004,2037505.4259696582],[8738281.073561348,1972075.3297575472],[8619650.805662755,1928659.0976915671],[8645333.647166574,1981859.2693780498],[8598248.437742906,2021606.5240863415]]}",
        "zoomLevel": 8
    },
    "sponserImageURL": [],
    "account": {
        "_id": "55a7c944d65763c23d11dd96",
        "name": "Huy Tran"
    },
    "id": "562bc48bfde8999f2995e61d"
}

我将 map.course 的数据保存为对象，从我的架构中看到的格式与我从open layers api收到的格式相同。我猜这是导致我的 findByIdAndRemove（id，callback）; 返回

TypeError: Cannot read property '562bc2b5fde8999f2995e61c' of undefined

如何解决此问题，以便除了保存此架构外，我还可以执行其他操作

Answer 1

您似乎将map.course保存为String（JSON数据），而不是Object。

如果是由ol.format.GeoJSON创建的GeoJSON，请考虑使用writeFeatureObject代替writeFeature。它们返回相同的结果，但第一个是实际的JS对象，秒是带有JSON的String。

GeoJSON数据保存但在查询时返回undefined

1 个答案: