我需要使用MongoDB C#驱动程序构造以下查询db.Notes.find({ "Group._id" : 74, "CustomFields" : { "$elemMatch" : { "Value" : /batch/i } }, "IsDeleted" : false }).sort({ "CreatedDateTimeUtc" : -1 }) Run Code Online (Sandbox Code Playgroud) 我使用了这样的查询 ...
// Find the docs where Stuff only contains 'chicken' or 'stock' elements db.test.find({Stuff: {$not: {$elemMatch: {$nin: ['chicken', 'stock']}}}) So the $elemMatch with the $nin is finding the docs where a single element of the Stuff array is not in the set of stri...
方法一 Mongodb:修改文档结构后出现错误:Element '***' does not match any field or property of class ***. Mongodb是一种面向文档的数据库,即不再有“行”的概念,取而代之的是更为灵活的“文档”(doucument)模型。在开发中,经常需要变更文档字段,比如添加一个字段等。 这时必须保证每个文档中的字段在实...
Mongodb:修改文档结构后出现错误:Element '***' does not match any field or property of class ***. Mongodb是一种面向文档的数据库,即不再有“行”的概念,取而代之的是更为灵活的“文档”(doucument)模型。在开发中,经常需要变更文档字段,比如添加一个字段等。 这时必须保证每个文档中的字段在实体字段中...
db.collection.update({array : {$elemMatch: {id:"3456"}}}, {$set: {'array.$.Y':'1'}}) Share Copy link Improve this answer Follow answeredMay 29, 2013 at 0:52 Abhishek Kumar 3,35622 gold badges1919 silver badges3232 bronze badges ...
If you specify only a single query condition in the$elemMatchexpression, you do not need to use$elemMatch. Just usedot notationto access the elements of an array or embedded document. For example inmongoshell: db.collection.update(
In short, just lookup the field, and use"dot notation": .find({"subRegions.code": regionCode }).exec(...); You would only need$infor essentially an$orcondition, looking up alternate values forsubRegions.code, so you don't need that when there is only one value to match....
通过 stackoverflow 上的一个回答解决了
1 mongodb find elements in Array 2 Using Mongo query to find an in array element 0 Find a value in array 1 Find array in array data in MongoDB 0 MongoDB : Match with element in an array 0 Mongo how to search for a field of element of array? 1 MongoDb find Object in a...
MongoDB查询转对象是出错Element '_id' does not match any field or property of class 解决方法: 1、在实体类加:[BsonIgnoreExtraElements] 2、或者定义public ObjectId _id { get; set; } 例子: [BsonIgnoreExtraElements] public class BaseData ...