Composite Primary Key

[Raichu]

Hi,

  I need to use a composite primary key in one my collection. We are not getting how to place @Id annotation to make it composite.

 If already asked & answered; please provide link for the same.

  

[Stanislav Vasilev]

Hi Raichu,

There is no such concept like composite primary key in MongoDb. You only have one document id. You can use a combination of unique keys to achieve part of your requirements and handle the rest of the logic in your application.

[Raichu]

Thanks for reply. Actually we were trying to keep number of indexes low. But we need to create composite indexes and handle them. 

[Raichu]

Hi,

  I may have put the question wrongly. Actually we are trying to this

{

    "_id" : {

            "user" : "123",

            "address" : "1"

        },

"address" : "abc"

}

we want to combine two fields to get single _id 

Is this possible in mongojack?

[James Roper]

Have you tried it?  Why wouldn't it be possible?

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[Ashwani kr Kushwaha]

Yes we were able to make it work like this 

private static JacksonDBCollection<Test, TestKey> coll = MongoDB.getCollection("test", Test.class, TestKey.class);

we were missing to pass testkey as argument

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