why use Optional<MyClass> if you cant call any methods that MyClass has?
hey guys. can smb explain to me what wrong? im trying to retrieve an object from DB:
Optional<Payment> earlierPayment=paymentRepository.findByTransactionIdAndAmount(paymentConfirmationRequest.getTransactionId(), paymentConfirmationRequest.getAmount());.
and for some reason i cant call any getters that my Payment entity has. does it mean that id need to change the return type of findByTransactionIdAndAmount from Optional<Payment> to just Payment? and then id loose the advantage Optional gives me. that doesnt make any sense 😦
any help? thanks8 Replies
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well, look at it this way
you ask the database to look up a thing by an id or something
obviously that thing might not exist, so at the repository level an Optional makes sense
Then in your service layer, you might actually need the thing to do something with
At that point, what do you do if you don't have the thing?
Can the method even continue?
If it can't,
.orElseThrow, if it can .(flat)mapwait a sec. it turns out that i can call
.get() method on my Optional
and then id have the object, and then i could call the the metods my object hasUnknown User•5mo ago
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yep. but i see that im doing
isEmpty on my optional earlier in my service
but thanks for telling me that it can be a pitfallIf you are finished with your post, please close it.
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Unknown User•5mo ago
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