db.collection.updateMany( { <query conditions>}, { <update operator>: {"<array>.$[<identifier>]": value } }, { arrayFilters: [ { <identifier>: <condition>} ] } ) 官方文档地址:https://docs.mongodb.com/manual/reference/operator/update-array/ 如上,建立一个示例,把 arr_1.c的值改回...
db.collection.updateMany( {<query conditions> },//查询条件{ <update operator>: { "<array>.$[<identifier>]" : value } },//更新内容{ arrayFilters: [ { <identifier>: <condition> } ] }//数组过滤条件) 请看代码。 //先清空下数据db.students.remove({})//插入数据db.students.insertMany( ...
$: Acts as a placeholder to update the first element that matches the query condition in an update. 示例1,使用empty filter作为query filter db.users.updateMany( {}, {$inc:{"comments.$.unlikes":1}} ) 1. 2. 3. 4. MongoDB抛出错误消息: "errmsg" : "The positional operator did not fin...
The update operation is not updateMany or multi is false. The update match condition is either: A single equality predicate. For example { "fieldA" : "valueA" } A logical AND of equality predicates. For example { "fieldA" : "valueA", "fieldB" : "valueB" } The fields in the equa...
condition={condition_field:update_data.get(condition_field)} update_operation=UpdateOne( update_operation=UpdateMany( condition, {"$set":update_data},upsert=upsert ) bulk_operations.append(update_operation) Expand DownExpand Up@@ -468,7 +468,7 @@ def get_index_key(self, coll_name, index_na...
Model.updateOne(condition,newDoc,[callback]) 修改符合条件的一个文档 Model.updateOne({name:"小明"}, { &set:{name:"大明"}}, (err)=>{ if(!err){ console.log("修改成功") } }); 1. 2. 3. 4. 5. Model.updateMany(condition,newDoc,[callback]) ...
To increment all elements in thegradesarray by10for all documentsexceptthose with the value100in thegradesarray, use the all positional$[]operator: db.results.updateMany( {"grades":{$ne:100} }, {$inc:{"grades.$[]":10} }, ) The all positional$[]operator acts as a placeholder for all...
@RunWith(SpringRunner.class) @SpringBootTest public class PersonServiceTest { @Autowired private MongoTemplate mongoTemplate; /** * 更新文档,匹配查询到的文档数据中的所有数据 * @throws Exception */ @Test public void updateMany() throws Exception { //更新对象 Person person =new Person(); person....
@RunWith(SpringRunner.class)@SpringBootTestpublicclassPersonServiceTest{@AutowiredprivateMongoTemplate mongoTemplate;/** * 存储文档,如果没有插入,否则更新 * @throws Exception */@Testpublicvoidsave()throws Exception{Person person=newPerson();person.setId(13l);person.setUserName("八八");person.setPassWo...
("mldn");MongoCollection col=db.getCollection("stucol");BasicDBObject condA=newBasicDBObject("sid",0);// 数据的查询条件BasicDBObject condB=newBasicDBObject("$set",newBasicDBObject("name","SuperMan));UpdateResult result=col.updateMany(condA,condB);System.out.println(result.getMatchedCount(...