位置无效:纬度必须是数字

时间:2019-12-26 01:09:39

标签: javascript node.js firebase google-cloud-firestore geofirestore

我正在尝试使用geofirestore执行GeoQuery。我想获取给定集合中半径1000以内的所有文档。

这是我的.js文件:

const GeoFirestore = require('geofirestore').GeoFirestore;
const GeoPoint = require('geopoint');
const firebase = require('firebase');

firebase.initializeApp({
    projectId : 'my-project-id'
});

module.exports = {
   getLocalDocuments: getLocalDocuments
}

async function getLocalDocuments() {
    let latitude = 38.9537323;
    let longitude = -77.3507578;
    let radius = 1000;

    // Create a Firestore reference
    const firestore = firebase.firestore();

    // Create a GeoFirestore reference
    const geofirestore = new GeoFirestore(firestore);

    // Create a GeoCollection reference
    const geocollection = geofirestore.collection('myDocs');

    const query = geocollection.near({
        center: new GeoPoint(latitude, longitude),
        radius
    });

    // Get query (as Promise)

    await query.get().then((value) => {
        console.log(`value.docs: ${value.docs}`); // All docs returned by GeoQuery
    });
}

调用 getLocalDocuments()函数时,我得到以下堆栈跟踪:

Error: Invalid location: latitude must be a number
    at validateLocation (/srv/node_modules/geofirestore/dist/index.cjs.js:567:15)
    at validateQueryCriteria (/srv/node_modules/geofirestore/dist/index.cjs.js:600:9)
    at GeoCollectionReference.GeoQuery.near (/srv/node_modules/geofirestore/dist/index.cjs.js:1416:9)
    at getLocalDocuments (/srv/utils/locationService.js:45:33)
    at Object.getLocalDocuments (/srv/utils/locationService.js:58:11)
    at buildLocalTPRecipients (/srv/utils/notificationInstructorGenerator.js:370:43)
    at notifyTPOfLocalJobsInstructionGenerator (/srv/utils/notificationInstructorGenerator.js:255:32)
    at Object.generateNewJobInstructions (/srv/utils/notificationInstructorGenerator.js:98:29)
    at handleOnCreate (/srv/db/jobs/onCreate.f.js:20:53)
    at cloudFunction (/srv/node_modules/firebase-functions/lib/cloud-functions.js:131:23)

这是 validateLocation 方法:

function validateLocation(location, flag) {
    if (flag === void 0) { flag = false; }
    var error;
    if (!location) {
        error = 'GeoPoint must exist';
    }
    else if (typeof location.latitude === 'undefined') {
        error = 'latitude must exist on GeoPoint';
    }
    else if (typeof location.longitude === 'undefined') {
        error = 'longitude must exist on GeoPoint';
    }
    else {
        var latitude = location.latitude;
        var longitude = location.longitude;
        if (typeof latitude !== 'number' || isNaN(latitude)) {
            error = 'latitude must be a number';
        }
        else if (latitude < -90 || latitude > 90) {
            error = 'latitude must be within the range [-90, 90]';
        }
        else if (typeof longitude !== 'number' || isNaN(longitude)) {
            error = 'longitude must be a number';
        }
        else if (longitude < -180 || longitude > 180) {
            error = 'longitude must be within the range [-180, 180]';
        }
    }
    if (typeof error !== 'undefined' && !flag) {
        throw new Error('Invalid location: ' + error);
    }
    else {
        return !error;
    }
}

有人知道为什么说纬度不是数字吗?我已经检查过isNaN()和其他方法,他们都说那是一个数字。

2 个答案:

答案 0 :(得分:0)

问题位于以下代码行的validateLocation函数内部:

var latitude = location.latitude;
var longitude = location.longitude;

这些行应该是:

var latitude = location.latitude();
var longitude = location.longitude();

由于latitudelongitude是getter方法。


GeoPoint GitHub

所述

.latitude(inRadians):返回点的纬度。默认情况下,纬度以度为单位,除非inRadians为真

.longitude(inRadians):返回点的经度。默认情况下,经度以度为单位,除非inRadians为真


复制步骤

创建某个特定的GeoPoint

var GeoPoint = require('geopoint'),
statueOfLiberty = new GeoPoint(40.689604, -74.04455);

然后是console.log(statueOfLiberty),这是预期的输出

GeoPoint {
  _degLat: 40.689604,
  _degLon: -74.04455,
  _radLat: 0.7101675611326549,
  _radLon: -1.2923211906575673 
}

此后,要验证上述GeoPoint,我使用了validateLocation(location, flag)函数,该函数与您使用的函数相同,并且可以也被发现 here

function validateLocation(location, flag){

    if (flag === void 0) { flag = false; }
    var error;
    if (!location) {
        error = 'GeoPoint must exist';
    }
    else if (typeof location.latitude === 'undefined') {
        error = 'latitude must exist on GeoPoint';
    }
    else if (typeof location.longitude === 'undefined') {
        error = 'longitude must exist on GeoPoint';
    }
    else {
        var latitude = location.latitude;
        var longitude = location.longitude;
        if (typeof latitude !== 'number' || isNaN(latitude)) {
            error = 'latitude must be a number';
        }
        else if (latitude < -90 || latitude > 90) {
            error = 'latitude must be within the range [-90, 90]';
        }
        else if (typeof longitude !== 'number' || isNaN(longitude)) {
            error = 'longitude must be a number';
        }
        else if (longitude < -180 || longitude > 180) {
            error = 'longitude must be within the range [-180, 180]';
        }
    }
    if (typeof error !== 'undefined' && !flag) {
        throw new Error('Invalid location: ' + error);
    }
    else {
        return !error;
    }
}
在代码中

调用函数,如下所示:

validateLocation(statueOfLiberty);


结果与您收到的错误消息没什么不同。

如上所述,当您在validateLocation函数中使用正确的getter方法调用时,整个故事就会改变:

var latitude = location.latitude();
var longitude = location.longitude();

答案 1 :(得分:0)

因此,您不/不应使用名为“ geopoint”的库。地理位置是Firebase / firestore对象...

const firebase = require('firebase');
const GeoPoint = firebase.firestore.GeoPoint;

进行更改,其他所有内容都应该起作用。