The new Firestore DB allows me to store GeoPoints. Is there a way to query based on them?

新的FiRestore数据库允许我存储GeoPoints。有没有基于它们进行查询的方法？

So for example if each of my collections documents got a location field of the type geopoint.
How can I get the closest 10 documents to an arbitrary coordinate?

例如，如果我的每个集合文档都有一个geopoint类型的位置字段。如何才能获得最接近任意坐标的10个文档？

The documentation doesn't seem to cover this. I tried stuff like this:

文件似乎没有涵盖这一点。我试过这样的东西：

someRef.where('location', '>', geopoint).limit(10).get();

Obviously this doesn't make much sense but I'm just trying out some stuff here 😅

显然，这没有多大意义，但我只是在尝试一些东西，😅

We haven't exposed geoqueries yet, so currently there isn't a way to do this.

我们还没有公开地理查询，所以目前还没有办法做到这一点。

Historically, the Firebase Realtime Database used geohashes in a library called GeoFire--but given that we plan to expose actual geoqueries in the near future, we haven't updated that library to Firestore. To learn how to do something similar yourself though, have a look at this video.

在历史上，Firebase实时数据库使用名为GeoFire的库中的Geohash--但考虑到我们计划在不久的将来公开实际的地理查询，我们还没有将该库更新为FiRestore。想要学习如何做一些类似的事情，看看这个视频。

A new project has been introduced since @problemsofsumit first ask this question. The project is called GEOFirestore.

自从@ProblemsofSumit第一次提出这个问题以来，一个新的项目就被引入了。该项目名为GEOFiRestore。

With this library you can perform queries like query documents within a circle:

使用此库，您可以执行查询，就像在圆圈内查询文档一样：

  const geoQuery = geoFirestore.query({
    center: new firebase.firestore.GeoPoint(10.38, 2.41),
    radius: 10.5
  });

You can install GeoFirestore via npm. You will have to install Firebase separately (because it is a peer dependency to GeoFirestore):

您可以通过NPM安装GeoFiRestore。您必须单独安装Firebase(因为它是GeoFiRestore的对等依赖项)：

$ npm install geofirestore firebase --save

You can link to it via cdn:
https://cdn.jsdelivr.net/npm/[email protected]/dist/geofirestore.min.js

您可以通过cdn链接：https://cdn.jsdelivr.net/npm/[email(受保护)/dist/GeoFireStore.min.js

You could let Algolia do the geo search with radius for you. All it would require is to build a cloud function that triggers on your wanted documents and sync them to Algolia.

你可以让阿戈利亚为你做半径的地理搜索。它所需要的只是构建一个云功能，在你想要的文件上触发，并将它们同步到AlGolia。

Take a look at Geo Search https://www.algolia.com/doc/guides/searching/geo-search/

看看地理搜索https://www.algolia.com/doc/guides/searching/geo-search/

Also Firebase documentation advertises Algolia as a solution to complex searches here https://firebase.google.com/docs/firestore/solutions/search

此外，Firebase文档还宣传AlGolia是复杂搜索的解决方案，此处为https://firebase.google.com/docs/firestore/solutions/search

Rather than use third party services like Algolia I would use the new library that came out for both iOS and Android that replicates GeoFire for Firestore. The new library, called GeoFirestore, is fully documented and well tested. I have used this library already in many demo projects and it seems to work perfectly. Give it a shot!

我不会使用AlGolia等第三方服务，而会使用iOS和Android上推出的新库，它复制了GeoFire for FiRestore。新的库名为GeoFiRestore，有完整的文档记录，并经过了良好的测试。我已经在许多演示项目中使用过这个库，它似乎工作得很好。试一试吧！

After scouting the net, i found this GeoFirestore library by chintan369 that you could use to query nearby geopoints. The queries are based on Firestore native queries. Just add below line into your build.gradle (project-level):

在网上搜索后，我发现了Chintan369的这个GeoFiRestore库，你可以用它来查询附近的地理点。这些查询基于FiRestore原生查询。只需在您的build.gradle中添加以下行(项目级)：

allprojects {
  repositories {
    ...
    maven { url 'https://jitpack.io' }
  }
}

Then add the library to your build.gradle (app-level):

然后将库添加到你的build.gradle(APP级)：

dependencies {
  implementation 'com.github.chintan369:Geo-FireStore-Query:1.1.0'
}

...and sync your project.

...并同步您的项目。

Visit https://medium.com/android-kotlin/geo-firestore-query-with-native-query-bfb0ac1adf0a for more.

请访问https://medium.com/android-kotlin/geo-firestore-query-with-native-query-bfb0ac1adf0a了解更多信息。

A way of doing this may be adding 2 fields: one contain the GeoPoint + and the other the lat/lng converted to a single number, and after that performing queries with the last one

一种方法是添加两个字段：一个包含GeoPoint+，另一个包含转换为单个数字的LAT/LNG，然后使用最后一个执行查询