环回:对象子字段上的过滤器附近 [英] Loopback: near filter on object sub-field

问题描述

我有一个这样的模型:

{
    name: 'My Favorite Shop',
    address:{
         location: [12.534 /* longitude */ ,41.9221/* latitude */]
    }
}

文档存储在mongodb数据库中，因此我想像这样查询它们:

Documents are stored in a mongodb database, and thus I'd like to query them like:

//assuming shops to be the name of the containing model
app.models.shops.find({
    where: {
        'address.location': {lat: 13, lng: 40}
    }
}, callback);

问题是此查询不会检索任何结果.我想这是由于location字段的性质所致，该字段嵌套在address中，但是我无法验证这一点.

Problem is this query would not retrieve any result. I guess it's because of the nature of location field, which is nested into address, but I couldn't verify that.

有什么主意吗?

谢谢

更新: 结果我忘了在数据源定义中设置enableGeoIndexing属性.完成后，查询将检索以下错误:

UPDATE: it came out I forgot to set the enableGeoIndexing property in datasource definition. Once done, the query is retrieving the following error:

 {"name":"MongoError","message":"Unable to execute query: error processing query: ns=acidata-dev.pos limit=25 skip=0\nTree: GEONEAR  field=address.location maxdist=1.79769e+308 isNearSphere=0\nSort: {}\nProj: {}\n planner returned error: unable to find index for $geoNear query","$err":"Unable to execute query: error processing query: ns=acidata-dev.pos limit=25 skip=0\nTree: GEONEAR  field=address.location maxdist=1.79769e+308 isNearSphere=0\nSort: {}\nProj: {}\n planner returned error: unable to find index for $geoNear query","code":17007}

推荐答案

我终于找到了问题所在.在address.location字段上应用了2d索引，但是环回(似乎)仅支持通过2dSphere索引进行地理查询.因此，我通过在此类字段上添加2dSphere索引来解决.

I finally found the problem. A 2d index was applied on the address.location field, but Loopback (seems to) only support geoquery over 2dSphere indexes. Thus, I solved by adding a 2dSphere index over such field.

这篇关于环回:对象子字段上的过滤器附近的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！