使用弹簧启动的MongoDB嵌入式文档

Question

但是在Spring引导中很好。我想在嵌入式文档中使用CRUD操作。我尽了最大努力使用Spring Boot，但是今天没有运气。我尝试的结构如下。我需要更新类别2，删除类别3，最后添加新类别。

文档

@Document(collection="reel")
public class Reel{

    @Id
    private ObjectId _id;
    private String name;
    List<Category> category;

    // No arg & arg constructoe, getters and setters
}


// I haven't use @Document
public class category{

    ptivate ObjectId _id=new ObjectId();
    private String categoryName;
    private String type;

    // No arg & arg constructoe, getters and setters
}

我拥有的结构，

{
  "_id": {
    "$oid": "5e8426717a16fb5b755edebd"
  },
  "name": "Name",
  "category": [
    {
      "_id": {
        "$oid": "5e8453c88056df756a242cd8"
      },
      "categoryName": "category 1",
      "type": "type 1"
    },
    {
      "_id": {
        "$oid": "5e8453c88056df756a242csd8"
      },
      "categoryName": "category 2",
      "type": "type 2"
    },
    {
      "_id": {
        "$oid": "5e8453c8805sd756a242cd8"
      },
      "categoryName": "category 3",
      "type": "type 3"
    }
  ],
  "_class": "com.videoappservice.model.Reel"
}

无论我如何尝试这样更新，

 public Category updateReelCategoryById(ObjectId id, String categoryName, String categoryType) {

    // Here I pass ID of category
    Query query=new Query().addCriteria(Criteria.where("_id").is(id));
    Update update= new Update()
       .set("reel.category.type",categoryType)
       .set("reel.category.categoryName",categoryName);

    Category result=mongoTemplate.findAndModify(query,update, Category.class);
    return result;
}

谢谢。请让我知道我的建模是否正确

Answer 1

您尝试得很好...以下是一些小的更正。

Query query=new Query().addCriteria(Criteria.where("category").elemMatch(Criteria.where("_id").is(id)));

Update update = new Update() 
    .set("category.$.type", categoryType)
    .set("category.$.description", categoryDescription);
UpdateResult result = mongoTemplate.updateFirst(query, update, Reel.class);