Consider the following Java Class.
class Transaction {
@Id
public String id;
public String firstProperty;
public String secondProperty;
}
class TransactionRepository extends MongoRepository<TransactionInfo , String> {
...
}
In Java following code is executed :
Transaction transaction = new Transaction("T1");
transaction.setFirstProperty("first");
transactionRepository.save(transaction);
Following document is created.
{
_id:123,
firstProperty: "first"
}
If this piece of code is executed later :
Transaction transaction = new Transaction("T1");
transaction.setSecondProperty("second");
transactionRepository.save(transaction);
Expected Document :
{
_id:123,
firstProperty: "first",
secondProperty: "second"
}
Actual Document:
{
_id:123,
secondProperty: "second"
}
From what I read in MongoDB docs I expect the document to be updated with “secondProperty” but it results in the removal of “firstProperty” . I think the document is getting created again, instead of getting updated. Please let me know if I am missing something.
!