使用Spring数据mongodb更新嵌入式mongodb文档中的数组字段？

我正在尝试使用SpringDataMongoDB更新mongodb中嵌入文档中的数组字段

我希望在mongodb集合中更新/插入的文档结构如下所示

根据部门的不同类型，可以有更多这样的文档，比如“销售”、“营销”等等

{
    "timestamp": "2014-09-26T04:00:00.000Z",
    "department": "accounts",
    "employee": [
        {
            "type": "regular",
            "names": [
                "Raj",
                "Kumar",
                "Shankar"
            ]
        },
        {
            "type": "contract",
            "names": [
                "Penny",
                "Sheldon",
                "bob"
            ]
        },
        {
            "type": "temp",
            "names": [
                "jerry",
                "kramer",
                "bubbleboy"
            ]
        }
    ]
}

基本上，我的更新查询如下所示

db.getCollection('mytest').update(
   { 
        "timestamp" : "2014-09-26T04:00:00.000Z",
        "department" : "accounts",
        "employee.type" : "regular"
    },
    { $addToSet: { "employee.$.names" : "Jo" } },
    {
        upsert: true
    }
)

我添加了upsert:true，因为如果没有与查询匹配的文档，我希望将该文档插入mytest集合

当我从MongoShell执行相同的操作时，我得到以下错误

   The positional operator did not find the match needed from the query. Unexpanded update: employee.$.names

即使这样做有效，我也不确定我们是否有类似的支持在SpringDataMongoDB中实现相同的功能

另外，我的另一个查询是，如果我想为多个部门添加/更新员工，比如说“accounts”和“sales”，那么我似乎必须以不同的值执行相同的查询，作为我想相应更新的部门数（如果不存在insert）

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是否有更好和高效的选项，例如批量/批处理，在其中，我可以在单个mongo更新查询中同时更新/插入多个部门的员工。另外，spring data mongodb/mongotemplate中是否支持同样的功能。

首先，我应该说，由于文档结构具有嵌入式数组，因此需要处理多个场景。如果可能，请尝试重新设计文档结构

对错误的简短回答：- 如果查询未找到匹配的文档，则会出现位置运算符错误

这就是为什么在我下面的解决方案中，我在catch块中处理了这个场景。如果你能通过单元测试，你应该能够理解

解决方案：-

public Boolean updateDepartmentCollectionWithoutFind(String name, String timeStamp)
            throws JsonParseException, JsonMappingException, IOException {

        MongoOperations mongoOperations = getMongoConnection();

        Query query = new Query();
        query.addCriteria(Criteria.where("timestamp").is(timeStamp).and("department").is("accounts")
                .and("employee.type").is("regular"));
        Update update = new Update();
        update.addToSet("employee.$.names", name);

        try {

            System.out.println(query.toString());
            System.out.println(update.toString());

            WriteResult writeResult = mongoOperations.upsert(query, update, DepartmentCollection.class);

            if (writeResult != null) {

                System.out.println("111111111111111111 Update with position parameter has been successful :"
                        + writeResult.toString());

            }
        } catch (DataIntegrityViolationException die) {
            System.out.println("Update failed ====>" + die.getMessage());
            System.out.println("Trying to update without position parameters ...");

            Update updateWithoutPositionOperator = new Update();
            updateWithoutPositionOperator.addToSet("employee.names", name);
            WriteResult writeResultUpsert = mongoOperations.upsert(query, updateWithoutPositionOperator,
                    DepartmentCollection.class);

            if (writeResultUpsert != null) {

                System.out.println("2222222222222222222 Update without position parameter has been successful :"
                        + writeResultUpsert.toString());

            }

        }

        return true;

    }

我的获取连接方法供参考：- 如果您有spring上下文，并且可以根据您的上下文更改上述代码，那么就不需要这样做

@SuppressWarnings("resource")
public MongoOperations getMongoConnection() {

    return (MongoOperations) new AnnotationConfigApplicationContext(SpringMongoConfig.class)
            .getBean("mongoTemplate");
}

单元测试：- 我发布单元测试是因为您需要了解场景和解决方案。请阅读每个测试和方法名称中的注释，以了解在每个场景中执行哪个upsert

测试3是一种特殊行为。请仔细看看

@Test
    public void updateDepartmentCollectionWhenNoDocumentsPresent() throws JsonParseException, JsonMappingException, IOException {

        //Second upsert executed (i.e. without positional parameter)
        Assert.isTrue(queryOperations.updateDepartmentCollectionWithoutFind("Raj", "2014-09-26T04:00:00.000Z"));

    }

    @Test
    public void updateDCWhenMatchingDocumentsPresentButDocumentHasOnlyRegularEmployeeType() throws JsonParseException, JsonMappingException, IOException {

        //Second upsert executed  (i.e. without positional parameter)       
        Assert.isTrue(queryOperations.updateDepartmentCollectionWithoutFind("Jo", "2014-09-26T04:00:00.000Z"));

    }   

    @Test
    public void updateDCWhenMultipleTypesPresentButNoRegular() throws JsonParseException, JsonMappingException, IOException {

        //First upsert executed  (i.e. with positional parameter). However, it creates a new document.      
        Assert.isTrue(queryOperations.updateDepartmentCollectionWithoutFind("Jo", "2014-09-27T04:00:00.000Z"));

    }   

    @Test
    public void updateDCWhenMultipleTypesPresentIncludingRegular() throws JsonParseException, JsonMappingException, IOException {

        //First upsert executed (i.e. with positional parameter) and existing document has been updated.        
        Assert.isTrue(queryOperations.updateDepartmentCollectionWithoutFind("Jo", "2014-09-29T04:00:00.000Z"));

    }

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您是否有机会查看下面的解决方案，看看它是否解决了您的问题？