Spring Boot MicroServices Course : Implement Get Orders APIs

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In this video, you will learn:
► How to read only required data from DB using JPA constructor expressions
► How to use custom JPQL queries to efficiently load associated data
► How to initialize test data for integration tests
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References
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[@antonygenil]

Siva, I'm thoroughly impressed by your work. Your ability to break down medium to complex concepts into easily understandable explanations is remarkable. I highly recommend your videos to anyone looking to improve their understanding of Spring Boot. Thank you for sharing such high-quality content!

[@DileepKumar-kg7ve]

Really Helpful with this series, learnt lot of new things which can be corelated to real-time applications. Great job keep helping us to learn more new things in java world.

[@azdanov]

Another way to avoid the problem of fetching lazy items is to use an EntityGraph annotation instead of a custom Query.

[@sivalabs]

Also, you can explore Blaze Persistence which provides some additional features on top of JPA.

[@azdanov]

It is also possible to rely on Spring Data to do automatically map to the projection by just specifying the return type in the repository without an explicit JPA Query. As long as the field names are the same in both the record and in the entity, then it will work.

[@sivalabs]

Yes. But I think it won't work if we are loading associated child collection and mapping to a Record.

[@azdanov]

@@sivalabs Yeah, it wouldn't work directly with OrderDTO. While OrderSummary worked for me.