我在使用Algolia的地理搜索功能方面遇到了一些问题。这是record of interest。
我也将其编入索引为described by the doc，以便我按最近距离对其进行排序：
'attributesToIndex' => ['name', 'description', 'geo']
在我的客户端脚本中：
let settings = {
aroundLatLng: '10.309813,123.893154',
getRankingInfo: true,
aroundRadius: 2000
};
index.search(keyword, settings, (err, data) => {
console.log(data);
});
但这给了我 0 点击。请注意aroundLatLng值 - 与record of interest中的值相同。
我在这里错过了什么吗？
答案 0 :(得分：2)
我已经在node.js中实现了相同的要求，如文档中给出的那样，并且工作正常。 我在这里复制我的整个代码。希望它可以帮助你。
<强>代码
/*
I have used async.water model to create the setting of the index and then searching data as per given parameter. few function is custom so no need to bother about that. read each line patently.
*/
try {
var self = this;
var post = req.body;
var user_id = post.user_id;
var created_mode = post.user_mode == 'requester' ? 'provider' : 'requester';
var kword = post.kword;
var geo = post.geo_loc;
var aroundLatLng = post.aroundLatLng;
var aroundRadius = !cmnFn.empty(post.radious) ? post.radious : 4500;
var hitsPerPage = !cmnFn.empty(post.hitsPerPage) ? post.hitsPerPage : 20;
var offset = !cmnFn.empty(post.offset) ? post.offset : 0;
var length = !cmnFn.empty(post.length) ? post.length : 50;
var budget_from = !cmnFn.empty(post.budget_from) ? post.budget_from : 0;
var budget_to = !cmnFn.empty(post.budget_to) ? post.budget_to : 0;
var day_preference = !cmnFn.empty(post.day_preference) ? post.day_preference : '';
var time_preference = !cmnFn.empty(post.time_preference) ? post.time_preference : '';
var start_date = !cmnFn.empty(post.start_date) ? post.start_date : '';
job_index是在Algolia上创建的索引
var job_index = algClient.initIndex('jobs');
var cond = {};
如果你正在使用facet＆amp;过滤然后你需要使用过滤键来执行你的条件，就像你在sql中使用clouse一样
cond.filters = 'created_mode:"' + created_mode + '" AND (NOT user_id:"' + user_id + '")';
// Query which need to be search
if (!cmnFn.empty(kword)) {
cond.query = !cmnFn.empty(post.kword) ? post.kword : '';
}
if ((!cmnFn.empty(budget_from) && !cmnFn.empty(budget_to)) && budget_from > 0) {
cond.filters += ' AND min_charge: ' + budget_from + ' TO ' + budget_to;
}
if (!cmnFn.empty(day_preference)) {
cond.filters += ' AND day_preference:"' + day_preference + '"';
}
if (!cmnFn.empty(time_preference)) {
cond.filters += ' AND time_preference:"' + time_preference + '"';
}
if (!cmnFn.empty(start_date) && (new Date(start_date)).getTime() > 0) {
cond.filters += ' AND start_date:"' + start_date + '"';
}
在这里我设置aroundLatLng以获取最接近远的数据
/*
Do not fogot one thing, before using geo search, your records must have _geoloc key having following format
"_geoloc": {
"lat": 40.639751,
"lng": -73.778925
}
*/
// Around geo search by given lat lng
if (!cmnFn.empty(aroundLatLng) && !cmnFn.empty(aroundLatLng.lat)) {
cond.aroundLatLng = aroundLatLng.lat + ', ' + aroundLatLng.lng;
if (!cmnFn.empty(aroundRadius) && cond.aroundRadius > 0) {
cond.aroundRadius = aroundRadius;
}
}
// total number of searched record
if (!cmnFn.empty(hitsPerPage)) {
cond.hitsPerPage = hitsPerPage;
}
// Record starting position
if (!cmnFn.empty(offset)) {
cond.offset = offset;
}
// Page Limitation
if (!cmnFn.empty(length)) {
cond.length = length;
}
// Don't show attributesToHighlight in result set
cond.attributesToHighlight = false;
/*
restrictSearchableAttributes: List of object key, where to search in given list defined in searchableAttributes
*/
cond.restrictSearchableAttributes = [
'user_id',
'title',
'description',
'_geoloc'
];
/*
It will return raning info of result when search come under geo search
Following output will return
"_rankingInfo": {
"nbTypos": 0,
"firstMatchedWord": 0,
"proximityDistance": 0,
"userScore": 31,
"geoDistance": 9, // Calculated distance between data geolocation given in _geoloc and search criteria in aroundLatLng
"geoPrecision": 1,
"nbExactWords": 0,
"words": 1,
"filters": 0,
"matchedGeoLocation": {
"lat": 28.5503,
"lng": 77.2501,
"distance": 9
}
}
*/
cond.getRankingInfo = true;
async.waterfall([
function (callback) {
job_index.setSettings({
'attributesForFaceting': ['user_id', 'created_mode', 'min_charge', 'day_preference', 'time_preference', 'start_date'],
/*
searchableAttributes: List of object key , where to search
eg: ['title', 'description']
Like in sql: Where title='your searched text' AND description='your searched text'
_geoloc is reserved keyword of algolia which will used to search geo location
*/
searchableAttributes: [
'title',
'description',
'user_id',
'_geoloc'
],
/*
attributesToRetrieve: Here you can specify list of key name which you want to retrive
eg: ['name','address','age']
Like in sql: Select name, address, age
*/
attributesToRetrieve: [
'*'
]
}).then(() => {
return callback(null, 'success');
});
}
], function (err, results) {
if (err) {
console.log('error: ' + err);
}
job_index.search(cond).then(results => {
if (results.nbHits > 0) {
var rows = new Array();
for (i in results.hits) {
var row = {};
var item = results.hits[i];
var user_info = {};
user_info = item.user_info;
// Get distance and calculate
if (!cmnFn.empty(item._rankingInfo)) {
item.distance = cmnFn.meterToKM(item._rankingInfo['geoDistance']);
} else {
let loc = {
geoLoc_1: { latitude: aroundLatLng.lat, longitude: aroundLatLng.lng },
geoLoc_2: { latitude: item._geoloc.lat, longitude: item._geoloc.lng }
}
cmnFn.getDistance(loc, function (distance) {
item.distance = distance
})
}
/* self.isFav({ user_id: item.user_id, job_id: item.job_id }), function (err, flag) {
item.is_favorite = flag;
}; */
self.isFav({ user_id: item.user_id, job_id: item.job_id }).then(function (flag) {
item.is_favorite = flag;
}, function (err) {
item.is_favorite = false;
});
if (cmnFn.empty(item.currency)) {
item.currency = "₹";
}
//Delete few key from object which does not need to send in response
delete item['user_info'];
delete item['objectID'];
delete item['_geoloc'];
delete item['_rankingInfo'];
row.job_info = item;
row.user_info = user_info;
rows.push(row);
}
info = { status: 1, message: util.format(lang.TOTAL_RECORD_FOUND, results.nbHits), data: rows };
cmnFn.showMsg(res, info);
} else {
info = { status: 0, message: lang.RECORD_NOT_FOUND, data: null };
cmnFn.showMsg(res, info);
}
}).catch(err => {
console.log(err);
info = { status: 0, message: lang.RECORD_NOT_FOUND, data: null };
cmnFn.showMsg(res, info);
});
//res.end('' + JSON.stringify(results));
});
} catch (error) {
info = { status: 0, message: lang.RECORD_NOT_FOUND, data: null };
cmnFn.showMsg(res, info);
}
答案 1 :(得分：1)
我的坏。 _geoloc的索引数据格式错误。应该使用lat和lng