Merge pull request #130 from onerain88/geo-query

feat: support geo query
oneRain 2021-05-12 16:47:18 +08:00 committed by GitHub
commit 93310c9810
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3 changed files with 50 additions and 0 deletions

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@ -1,4 +1,6 @@
using NUnit.Framework;
using System;
using System.Threading.Tasks;
using LeanCloud.Storage;
namespace Storage.Test {
@ -19,5 +21,32 @@ namespace Storage.Test {
TestContext.WriteLine(radians);
Assert.Less(radians - 0.0005, 0.0001);
}
[Test]
public async Task Query() {
LCObject geoObj = new LCObject("GeoObj");
Random random = new Random();
LCGeoPoint p1 = new LCGeoPoint(-90 + random.NextDouble() * 180, -180 + random.NextDouble() * 360);
geoObj["location"] = p1;
await geoObj.Save();
LCGeoPoint p2 = new LCGeoPoint(p1.Latitude + 0.01, p1.Longitude + 0.01);
double km = p1.KilometersTo(p2);
TestContext.WriteLine($"km: {km}, {Math.Ceiling(km)}");
LCQuery<LCObject> query = new LCQuery<LCObject>("GeoObj");
query.WhereWithinKilometers("location", p2, Math.Ceiling(km));
Assert.Greater((await query.Find()).Count, 0);
double miles = p1.MilesTo(p2);
query = new LCQuery<LCObject>("GeoObj");
query.WhereWithinMiles("location", p2, Math.Ceiling(miles));
Assert.Greater((await query.Find()).Count, 0);
double radians = p1.RadiansTo(p2);
query = new LCQuery<LCObject>("GeoObj");
query.WhereWithinRadians("location", p2, Math.Ceiling(radians));
Assert.Greater((await query.Find()).Count, 0);
}
}
}

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@ -94,6 +94,14 @@ namespace LeanCloud.Storage.Internal.Query {
AddOperation(key, "$within", value);
}
public void WhereWithinRadians(string key, LCGeoPoint point, double maxDistance) {
Dictionary<string, object> value = new Dictionary<string, object> {
{ "$nearSphere", point },
{ "$maxDistance", maxDistance }
};
Add(new LCEqualCondition(key, value));
}
public void WhereRelatedTo(LCObject parent, string key) {
Add(new LCRelatedCondition(parent, key));
}

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@ -205,6 +205,19 @@ namespace LeanCloud.Storage {
return this;
}
public LCQuery<T> WhereWithinRadians(string key, LCGeoPoint point, double maxDistance) {
Condition.WhereWithinRadians(key, point, maxDistance);
return this;
}
public LCQuery<T> WhereWithinMiles(string key, LCGeoPoint point, double maxDistance) {
return WhereWithinRadians(key, point, maxDistance / 3958.8);
}
public LCQuery<T> WhereWithinKilometers(string key, LCGeoPoint point, double maxDistance) {
return WhereWithinRadians(key, point, maxDistance / 6371.0);
}
/// <summary>
/// The value corresponding to key is related to the parent.
/// </summary>