[mongodb-dev] Duplicates are being created in MongoDB

[j***@gmail.com]

Hi,
I have created a DAO class where I'm using @CompoundIndexes to avoid
duplicates into my DB but still the entries are being populated. Any idea
about how we can avoid it?

Example class:
@Document(collection = "ABC")
@CompoundIndexes({
@CompoundIndex(def = "{'A.B.x':1, 'A.B.y':1}", name =
"compound_index_1"),
@CompoundIndex(def = "{'A.C.k':1, 'A.C.l':1}", name = "compound_index_2")
})
public class XXX{
private A a;
private String dateOfEntry;
private String dateOfUpdate;
}

class A {
private B b;
private C c;
private string status;

}

class B {
private string x;
private string y;
}

class C{
private string k;
private string l;
private string m;
}

['Wan Bachtiar' via mongodb-dev]

Hi,

Note that questions related to the use of MongoDB (i.e. your question) are
better sent to mongodb-user group
<https://groups.google.com/forum/#!forum/mongodb-user>. This group
(mongodb-dev) is for discussion for/by/about developers/development/code of
MongoDB.

Please see MongoDB: Unique Indexes
<https://docs.mongodb.com/manual/core/index-unique/> for information
preventing duplicates entry based on unique field(s).

If you have further questions about duplicates, please post a new
discussion on mongodb-user group
<https://groups.google.com/forum/#!forum/mongodb-user> along with
information below:

- MongoDB version.
- Example of MongoDB documents.
- Steps to reproduce the problem.

Regards,

Wan.
​