Question

我在两件事上需要帮助。

使用 spring mongo模板从mongo查询中创建Spring mongoquery。


过滤结果，并仅从具有json树结构的文档中获取较低级别的对象。

我只想通过以下方式获取匹配的 merchant_shops 的列表   community_id，package_type_id和category_id的列表。

我正在使用mongodb版本4。预先谢谢你。

文档：

{
    "_id" : ObjectId("5bdafff206ba681e30895e50"),
    "community_id" : "09a5c059-33b3-4e47-9905-709f5c244580",
    "package_types" : [ 
        {
            "package_type_id" : 1,
            "categories" : [ 
                {
                    "category_id" : "5bd0433d8ac2ce275082ff1f",
                    "subcategories" : [ 
                        {
                            "subcategory_id" : "5bd0436d8ac2ce275082ff20",
                            "merchant_shops" : [ 
                                {
                                    "shop_id" : "5bd19a704ab492427d7326a0",
                                    "distance" : 14.2841995007249
                                }, 
                                {
                                    "shop_id" : "5bd84aed4ab4926fb2060e76",
                                    "distance" : 14.283313487973
                                }, 
                                {
                                    "shop_id" : "5bdc14ad4ab492123f29c6a7",
                                    "distance" : 14.2829648551977
                                }, 
                                {
                                    "shop_id" : "5be9555e4ab4923a01c7b7f8",
                                    "distance" : 11.8215058435006
                                }, 
                                {
                                    "shop_id" : "5be95a974ab4923a01c7b7fc",
                                    "distance" : 11.8081739265758
                                }
                            ]
                        }
                    ]
                }
            ]
        }, 
        {
            "package_type_id" : 3,
            "categories" : [ 
                {
                    "category_id" : "5bd0433d8ac2ce275082ff1f",
                    "subcategories" : [ 
                        {
                            "subcategory_id" : "5bd0436d8ac2ce275082ff20",
                            "merchant_shops" : [ 
                                {
                                    "shop_id" : "5bd84aed4ab4926fb2060e76",
                                    "distance" : 14.283313487973
                                }
                            ]
                        }
                    ]
                }
            ]
        }
    ]
}

在mongodb中正常工作的查询：

db.getCollection('community_shop').aggregate([
    { $match: {"community_id": "09a5c059-33b3-4e47-9905-709f5c244580"} },
    { $project: 
       {
        package_types: 
           {$filter: {
            input: '$package_types',
            as: 'item',
            cond: {
               $or: [
                       {
                        $in: ['$$item.package_type_id', [1,3]]
                       },{
                          $eq: ['$$item.categories.category_id', "5bd0433d8ac2ce275082ff1f"] 
                         }
                    ]
                }
            }}
        }
    }
 ])

Java类是：

@Document(collection = "community_shop")
public class CommunityShopDOB {

    @Id
    private String id;

    @Field("community_id")
    private String communityId;

    @Field("package_types")
    private List<PackageType> packageTypes;

    public static class PackageType {

        @Field("package_type_id")
        private Integer packageTypeId;

        @Field("categories")
        private List<Category> categories;

        public static class Category {

            @Field("category_id")
            private String categoryId;

            @Field("subcategories")
            private List<Subcategory> subcategories;

            public static class Subcategory {

                @Field("subcategory_id")
                private String subcategoryId;

                @Field("merchant_shops")
                private List<MerchantShop> merchantShops;

                public static class MerchantShop {

                    @Field("shop_id")
                    private String shopId;

                    @Field("distance")
                    private Double distance;

                    @Field("filter_value_ids")
                    private List<String> filterValueIds;
         }
     }
   }
}

到目前为止，我的解决方案是错误的：

Criteria cr = Criteria.where("communityId").is(society_id);
            MatchOperation filterStates = Aggregation.match(cr);
            Aggregation aggregation = newAggregation(filterStates, project("packageTypes")
                    .and(filter("packageTypes").as("item").by(valueOf("item.packageTypeId").equalToValue(1))

                    ).as("packageTypes"));

            AggregationResults<CommunityShopDOB> output = mongoTemplate.aggregate(aggregation, CommunityShopDOB.class,
                    CommunityShopDOB.class);
            return output.getUniqueMappedResult();

使用mongoTemplate在Spring中创建mongo查询

0 个答案: