handle deep geo-near queries (#1216)
a dedicated mongKey is added in geo.nearFilter for mongoDB fixes geo min distance tests as filter now expects an array
This commit is contained in:
Corentin H
Sakib Hasan
parent
fc2f66c514
commit
6f88cf1930
106
lib/geo.js
106
lib/geo.js
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@ -12,32 +12,65 @@ var assert = require('assert');
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*/
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exports.nearFilter = function nearFilter(where) {
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var result = false;
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function nearSearch(clause, parentKeys) {
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if (typeof clause !== 'object') {
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return false;
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}
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parentKeys = parentKeys || [];
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if (where && typeof where === 'object') {
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Object.keys(where).forEach(function(key) {
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var ex = where[key];
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if (ex && ex.near) {
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result = {
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near: ex.near,
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maxDistance: ex.maxDistance,
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minDistance: ex.minDistance,
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unit: ex.unit,
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key: key,
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};
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Object.keys(clause).forEach(function(clauseKey) {
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if (Array.isArray(clause[clauseKey])) {
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clause[clauseKey].forEach(function(el, index) {
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var ret = nearSearch(el, parentKeys.concat(clauseKey).concat(index));
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if (ret) return ret;
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});
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} else {
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if (clause[clauseKey].hasOwnProperty('near')) {
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var result = clause[clauseKey];
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nearResults.push({
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near: result.near,
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maxDistance: result.maxDistance,
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minDistance: result.minDistance,
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unit: result.unit,
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// If key is at root, define a single string, otherwise append it to the full path array
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mongoKey: parentKeys.length ? parentKeys.concat(clauseKey) : clauseKey,
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key: clauseKey,
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});
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}
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}
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});
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}
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var nearResults = [];
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nearSearch(where);
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return result;
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return (!nearResults.length ? false : nearResults);
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};
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/*!
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* Filter a set of objects using the given `nearFilter`.
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* Filter a set of results using the given filters returned by `nearFilter()`.
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* Can support multiple locations, but will include results from all of them.
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*
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* WARNING: "or" operator with GeoPoint does not work as expected, eg:
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* {where: {or: [{location: {near: (29,-90)}},{name:'Sean'}]}}
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* Will actually work as if you had used "and". This is because geo filtering
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* takes place outside of the SQL query, so the result set of "name = Sean" is
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* returned by the database, and then the location filtering happens in the app
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* logic. So the "near" operator is always an "and" of the SQL filters, and "or"
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* of other GeoPoint filters.
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*
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* Additionally, since this step occurs after the SQL result set is returned,
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* if using GeoPoints with pagination the result set may be smaller than the
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* page size. The page size is enforced at the DB level, and then we may
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* remove results at the Geo-app level. If we "limit: 25", but 4 of those results
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* do not have a matching geopoint field, the request will only return 21 results.
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* This may make it erroneously look like a given page is the end of the result set.
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*/
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exports.filter = function(arr, filter) {
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exports.filter = function(rawResults, filters) {
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var distances = {};
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var results = [];
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filters.forEach(function(filter) {
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var origin = filter.near;
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var max = filter.maxDistance > 0 ? filter.maxDistance : false;
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var min = filter.minDistance > 0 ? filter.minDistance : false;
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@ -45,42 +78,33 @@ exports.filter = function(arr, filter) {
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var key = filter.key;
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// create distance index
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var distances = {};
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var result = [];
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rawResults.forEach(function(result) {
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var loc = result[key];
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arr.forEach(function(obj) {
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var loc = obj[key];
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// filter out objects without locations
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// filter out results without locations
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if (!loc) return;
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if (!(loc instanceof GeoPoint)) {
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loc = GeoPoint(loc);
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}
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if (!(loc instanceof GeoPoint)) loc = GeoPoint(loc);
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if (typeof loc.lat !== 'number') return;
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if (typeof loc.lng !== 'number') return;
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var d = GeoPoint.distanceBetween(origin, loc, {type: unit});
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if (min && d < min) {
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return;
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}
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if (max && d > max) {
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// dont add
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} else {
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distances[obj.id] = d;
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result.push(obj);
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}
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// filter result if distance is either < minDistance or > maxDistance
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if ((min && d < min) || (max && d > max)) return;
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distances[result.id] = d;
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results.push(result);
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});
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return result.sort(function(objA, objB) {
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var a = objA[key];
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var b = objB[key];
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results.sort(function(resA, resB) {
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var a = resA[key];
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var b = resB[key];
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if (a && b) {
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var da = distances[objA.id];
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var db = distances[objB.id];
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var da = distances[resA.id];
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var db = distances[resB.id];
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if (db === da) return 0;
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return da > db ? 1 : -1;
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@ -88,6 +112,9 @@ exports.filter = function(arr, filter) {
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return 0;
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}
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});
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});
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return results;
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};
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exports.GeoPoint = GeoPoint;
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@ -285,4 +312,3 @@ function geoDistance(x1, y1, x2, y2, options) {
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return 2 * Math.asin(f) * EARTH_RADIUS[type];
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}
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@ -38,6 +38,7 @@ describe('basic-querying', function() {
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name: String,
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},
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],
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addressLoc: {type: 'GeoPoint'},
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});
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db.automigrate(done);
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@ -553,6 +554,147 @@ describe('basic-querying', function() {
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});
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});
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describe('geo queries', function() {
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describe('near filter', function() {
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it('supports a basic "near" query', function(done) {
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User.find({
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where: {
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addressLoc: {
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near: '29.9,-90.07',
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},
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},
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}, function(err, users) {
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if (err) done(err);
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users.should.have.property('length', 3);
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users[0].name.should.equal('John Lennon');
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users[0].addressLoc.should.not.be.null();
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done();
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});
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});
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it('supports "near" inside a coumpound query with "and"', function(done) {
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User.find({
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where: {
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and: [
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{
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addressLoc: {
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near: '29.9,-90.07',
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},
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},
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{
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vip: true,
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},
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],
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},
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}, function(err, users) {
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if (err) done(err);
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users.should.have.property('length', 2);
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users[0].name.should.equal('John Lennon');
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users[0].addressLoc.should.not.be.null();
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users[0].vip.should.be.true();
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done();
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});
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});
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it('supports "near" inside a complex coumpound query with multiple "and"', function(done) {
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User.find({
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where: {
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and: [
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{
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and: [
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{
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addressLoc: {
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near: '29.9,-90.07',
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},
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},
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{
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order: 2,
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},
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],
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},
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{
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vip: true,
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},
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],
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},
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}, function(err, users) {
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if (err) done(err);
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users.should.have.property('length', 1);
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users[0].name.should.equal('John Lennon');
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users[0].addressLoc.should.not.be.null();
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users[0].vip.should.be.true();
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users[0].order.should.equal(2);
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done();
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});
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});
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it('supports multiple "near" queries with "or"', function(done) {
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User.find({
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where: {
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or: [
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{
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addressLoc: {
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near: '29.9,-90.04',
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maxDistance: 300,
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},
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},
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{
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addressLoc: {
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near: '22.97,-88.03',
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maxDistance: 50,
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},
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},
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],
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},
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}, function(err, users) {
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if (err) done(err);
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users.should.have.property('length', 2);
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users[0].addressLoc.should.not.be.null();
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users[0].name.should.equal('Paul McCartney');
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users[1].addressLoc.should.not.equal(null);
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users[1].name.should.equal('John Lennon');
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done();
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});
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});
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it('supports multiple "near" queries with "or" ' +
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'inside a coumpound query with "and"', function(done) {
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User.find({
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where: {
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and: [
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{
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or: [
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{
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addressLoc: {
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near: '29.9,-90.04',
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maxDistance: 300,
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},
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},
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{
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addressLoc: {
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near: '22.7,-89.03',
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maxDistance: 50,
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},
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},
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],
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},
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{
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vip: true,
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},
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],
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},
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}, function(err, users) {
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if (err) done(err);
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users.should.have.property('length', 1);
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users[0].addressLoc.should.not.be.null();
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users[0].name.should.equal('John Lennon');
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users[0].vip.should.be.true();
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done();
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});
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});
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});
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});
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it('should only include fields as specified', function(done) {
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var remaining = 0;
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@ -590,8 +732,9 @@ describe('basic-querying', function() {
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}
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sample({name: true}).expect(['name']);
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sample({name: false}).expect(['id', 'seq', 'email', 'role', 'order', 'birthday', 'vip',
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'address', 'friends']);
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sample({name: false}).expect([
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'id', 'seq', 'email', 'role', 'order', 'birthday', 'vip', 'address', 'friends', 'addressLoc',
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]);
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sample({name: false, id: true}).expect(['id']);
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sample({id: true}).expect(['id']);
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sample('id').expect(['id']);
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@ -1005,6 +1148,7 @@ function seed(done) {
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{name: 'George Harrison'},
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{name: 'Ringo Starr'},
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],
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addressLoc: {lat: 29.97, lng: -90.03},
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},
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{
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seq: 1,
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@ -1025,8 +1169,15 @@ function seed(done) {
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{name: 'George Harrison'},
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{name: 'Ringo Starr'},
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],
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addressLoc: {lat: 22.97, lng: -88.03},
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},
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{
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seq: 2,
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name: 'George Harrison',
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order: 5,
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vip: false,
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addressLoc: {lat: 22.7, lng: -89.03},
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},
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{seq: 2, name: 'George Harrison', order: 5, vip: false},
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{seq: 3, name: 'Ringo Starr', order: 6, vip: false},
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{seq: 4, name: 'Pete Best', order: 4},
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{seq: 5, name: 'Stuart Sutcliffe', order: 3, vip: true},
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@ -147,8 +147,8 @@ describe('GeoPoint', function() {
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},
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};
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var filter = nearFilter(where);
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filter.key.should.equal('location');
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filter.should.have.properties({
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filter[0].key.should.equal('location');
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filter[0].should.have.properties({
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key: 'location',
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near: {
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lat: 40.77492964101182,
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@ -187,7 +187,7 @@ describe('GeoPoint', function() {
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lng: 121.483687,
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},
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}];
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var filter = {
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var filter = [{
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key: 'location',
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near: {
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lat: 30.278562,
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@ -195,7 +195,7 @@ describe('GeoPoint', function() {
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},
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unit: 'meters',
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minDistance: 10000,
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};
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}];
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var results = geoFilter(points, filter);
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results.length.should.be.equal(3);
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});
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