Question

我有三个收藏。如果要匹配，我想根据“手机号码”合并所有三个集合的文档，否则添加为新文档并将其保存到新集合中。

（1）用户集合

[
{id: ObjectId(...), name:"john", mobile:1234, city:"London"},
{id: ObjectId(...), name:"mike", mobile:1111, city:"Berlin"},
{id: ObjectId(...), name:"jenny", mobile:2222, city:"Paris"},
]

（2）爱好收藏

[

{id: ObjectId(...), hobby:"hockey", mobile:1111},
{id: ObjectId(...), hobby:"cricket", mobile:1234},
{id: ObjectId(...), hobby:"movies", mobile:6666},
]

（3）关键字集合

[
{id: ObjectId(...), keyword:"cr", mobile:1234},
{id: ObjectId(...), keyword:"hk", mobile:2222},
{id: ObjectId(...), keyword:"uk", mobile:7777}
]

尽管我能够将所有三个收藏文档合并为一个。

db.finalCollection.save(db.users.find().toArray());
db.finalCollection.save(db.hobbies.find().toArray());
db.finalCollection.save(db.keyword.find().toArray());

但是我不知道如何合并具有相同手机号码的文档，并且在不匹配的情况下添加为新文档。

我的预期输出是：

[
  {id: ObjectId(...), name:"john", mobile:1234, city:"London", 
  hobby:"cricket",keyword:"cr"},
  {id: ObjectId(...), name:"mike", mobile:1111, city:"Berlin", 
  hobby:"hockey"},
  {id: ObjectId(...), name:"jenny", mobile:2222, city:"Paris", 
  keyword:"hk"},
  {id: ObjectId(...), hobby:"movies", mobile:6666},
  {id: ObjectId(...), keyword:"uk", mobile:7777}
]

合并来自不同馆藏的文件

0 个答案: