我在使用Algolia的地理搜索功能时遇到了一些问题。这是record of interest。
我也将其编入described by the doc索引，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);
});
但是这让我受到了打击。注意aroundLatLng值 - 它与record of interest的值相同。
我在这里错过了什么吗？
我在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。希望它可以帮到你。
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和filter，那么你需要使用filter key来执行你的条件，就像你在sql中使用where子句一样
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以获得最接近远的数据
/*
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);
}
我的错。 _geoloc的索引数据格式错误。应该与lat和lng密切联系