Spring Data MongoDB将数组添加到现有文档 [英] Spring data MongoDB adding arrays to an existing document

问题描述

说我有以下收藏

    public @Data  class Customer {

    @Id
    private String id;

    private String firstName;
    private String lastName;

    @DBRef
    private List<Address> addressList= new ArrayList<Address>();
}

和

public @Data class  Address {

    @Id
    private String id;
    private String address;
    private String type;
    private String customerID;
}

每个客户都有多个地址，我已经实现了MongoRepository.第一次保存客户在customerRepo.save(customerObject)上运行良好，在调用保存之前，我先保存多个地址对象，然后将其设置为addressList. 下次当我更新同一文档并想向现有列表中添加一组新的地址时，它将覆盖整个addressList数组.因此，基本上，如果有数千个(或超过一千个)元素，或者现在我要对addressList数组进行切片，那么现在要做的就是像这样existingCustomerObject.getAddressList().addAll(my new List of address)设置新地址，以下过程将不是一个好主意.我的问题是实现此方案的最佳方法是什么?说出我是否不想使用MongoTemplate.是否可以仅使用MongoRepository

And each Customer has multiple addresses, and I have implemented MongoRepository. Saving customer for the First time is working pretty well customerRepo.save(customerObject) and before calling the save I am persisting multiple Address Objects and then setting those to the addressList. Next time when I am updating the same document and want to add a New set of Address to the existing list it is overwriting the whole addressList array. So basically what I have to do now to set new address like thisexistingCustomerObject.getAddressList().addAll(my new List of address) if there are thousand(or more than thousand) of elements or I am slicing the addressList array the following procedure won't be a good idea. My question is what is the best way to achieve this scenario? say if I don't want to use MongoTemplate. Is it possible Just using the MongoRepository

推荐答案

我认为您无法以这种方式进行操作.以前我也有同样的情况，我尝试了以下方法

I don't think you can do it in that way. Previously i had the same situation, and I tried the following

1. org.springframework.core.convert.converter.Converter即使我设法操纵D BObject，但$push或$set(将它们包裹在键下)之类的功能也无法在那儿工作.

1.org.springframework.core.convert.converter.Converter even I have managed to manipulate the DBObject but functions like $push or $set(wrapping them under key) does not work over there.

2. AbstractMongoEventListener通过覆盖onBeforeSave，但是在保存期间未进行对象操作.

2.AbstractMongoEventListener by overriding onBeforeSave but Object manipulation was not taking place during save.

但是您可以尝试更改提到的内容

However you can try altering the mentioned

您可以尝试覆盖MongoRepository保存方法，如果有人指向正确的方向，效果会更好. 否则，对于我的情况，我必须创建与MongoRepository并行工作(用于插入和检索数据/文档)的自定义存储库(以更新和删除文档)，但是我认为这是一个丑陋的解决方法.必须有一种更清洁的方式来做到这一点.

you can try override MongoRepository save method, It would better if someone point to the right direction. Otherwise for my scenario I had to create Custom repository(To update and delete document) which is working parallel with MongoRepository (for Insert and retrieve data/document), but I believe thats an ugly workaround. There has to be a cleaner way to do it.

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