java - Spring mongodb @DBRef 查询在基本查询中搜索父字段

Question

如何查询mongodb来搜索作者名字为“Vinod”的所有出版物？

这是我的出版类

@Document(collection = "publications")
public class Publication {

    @Id
    private String id;

    private String title;

    private Date publicationDate;

    @DBRef
    private Author author;

    //getter and setters here
}

我的作者类别是

@Document(collection = "authors")
public class Author {

    @Id
    private String id;

    @Indexed(unique = true)
    private String username;

    private String firstName;

    private String lastName;

    //getter and setters here
}

这就是它在数据库中的存储方式。

发表

{
  "_id" : ObjectId("5a339cc4e193d31c47916c2c"),
   "_class" : "com.publication.models.Publication",
  "title" : "Some title",
  "publicationDate" : ISODate("2017-12-15T09:58:28.617Z"),
  "author" : {
    "$ref" : "authors",
    "$id" : ObjectId("5a339cc0e193d31c47916ad0")
  }
}

作者:

{
  "_id" : ObjectId("5a339cc0e193d31c47916ad0"),
  "_class" : "com.publication.models.Author",
  "username" : "abcd0050",
  "firstName" : "Vinod",
  "lastName" : "Kumar"
}

这就是我需要查询的方式。

BasicQuery query = new BasicQuery("{ author.name : 'vinod' }");
Publication test = mongoOperation.find(query, Publication.class);

Answer 1

我建议您使用 RelMongo，这是一个基于 Spring Data 构建的小框架，允许以 JPA 方式对 MongoDB 集合使用 @OneToMany 和 @OneToOne 注释