找不到类 org.springframework.data.mongodb.core.query.GeoCommand 的编解码器答案

【问题标题】：Can't find a codec for class org.springframework.data.mongodb.core.query.GeoCommand找不到类 org.springframework.data.mongodb.core.query.GeoCommand 的编解码器
【发布时间】：2016-04-19 09:15:09
【问题描述】：

这是我的代码

Criteria c = new Criteria();
    c.andOperator(Criteria.where("country").is(country),
            Criteria.where("createTime").lte(wp),
            Criteria.where("location").withinSphere(circle),
            Criteria.where("titleContent").exists(true));

    AggregationOperation match = Aggregation.match(c);
    AggregationOperation limit = Aggregation.limit(20);
    AggregationOperation sort = Aggregation.sort(new Sort(Sort.Direction.DESC, "createTime"));
    AggregationOperation group = Aggregation.group("titleContent").sum("count").as("titleCount").count().as("contentCount");
    Aggregation aggregation = Aggregation.newAggregation(match, sort, limit, group);
    AggregationResults<TitleRes> result = template.aggregate(aggregation, "post", TitleRes.class);

当我添加Criteria.where("location").withinSphere(circle)

会抛出异常

org.bson.codecs.configuration.CodecConfigurationException: Can't find a codec for class org.springframework.data.mongodb.core.query.GeoCommand

当我删除Criteria.where("location").withinSphere(circle)

没关系。

我不知道如何处理它。我想在Sphere中获取数据。

【问题讨论】：

标签： java mongodb spring-boot

【解决方案1】：

我使用 geoNear 命令解决了这个问题： https://docs.mongodb.com/manual/reference/command/geoNear/

从条件中删除位置并使用 geoNear 而不是匹配：

        NearQuery near = NearQuery.near(new GeoJsonPoint(request.getLongitude(), request.getLatitude()));
        near = near.maxDistance(request.getDistance() / Metrics.MILES.getMultiplier());
        near = near.num(2000000);//watch out for max num default restriction
        near = near.spherical(true);
        Query q = new Query();
        q.addCriteria(matchCriteria);
        near = near.query(q);
        AggregationOperation geoNear = Aggregation.geoNear(near, "location");

【讨论】：