Hibernate Tutorial 16 - CascadeTypes and Other Things

[@davidjohnson786]

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[@dhanyapp]

All the series of tutorials on Hibernate is informative and presented in a very good manner. Thank you for sharing the same!

[@dhritimanpandit2730]

Thanks man, this video really helped clear my doubts

[@StefanFalk]

You deserve a lot more up votes!

[@sundaramjesudasan]

I've been looking for Notfound annotation. I have handled like, ObjectNotFoundException in my catch block. This is cool. I'm gonna try this today. Thank you for your effort.

[@hyperborean72]

Dear Koushik, will you please answer my two questions? 1. Do we need to remove @ManyToOne to Cascade to work? 2. did I understand correct that if Vehicle is a ValueObject then saving its instances to collection on One-side saves them as well (no cascading needed in that case)? Thank you

[@danishrockz1]

cascading should be done on inverse side ( Parent entity ).. If u would remove @ManyToOne thn there will be no relationship at all.. hence it's needed.. second point I agree

[@harshadkalantri19]

Got this error - object references an unsaved transient instance - save the transient instance before flushing. Can you tell me how to resolve ?

[@siraj3676]

Hi Koushik, Awesome explanation. I have one query. Why don't you using a mapping file?? Which one is preferred? plz let me know. Thank you

[@anasheko2432]

@NotFound(action = NotFoundAction.IGNORE) is not working with me??

[@LeBadman]

Why would a CRUD operation on UserDetails affect all the Vehicles?.. I don't understand this. Does someone know, please?

[@vinaykumar-no2zh]

You can mention not-null="false"

[@nehaagrawal30]

Hi Koushik, Thanks for this tutorial. I don't get an exception even if I don't use @NotFound. what am I missing?

[@andrei-un3yr]

I'm not getting an exception when using @NotFound(action = NotFoundAction.EXCEPTION) or by not setting it at all. I instead get null. Does anyone know why?

[@vimalalwaysrocks]

Koushks, What book? do you use for Hibernate?

[@nikitaparab1483]

What exception is thrown if we dont write @NotFound ?

[@reachmanav]

Mine did not throw any exception, but just "Null", so not sure either

[@divinity5250]

06:00 mins: cascades starts

[@barry_allen558]

What is the exact difference between session.persist() and session.save()????????

[@quincyfinnley2653]

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[@tuckeraxton9064]

@Quincy Finnley Definitely, been watching on flixzone for since november myself :D

[@lockstockandbarrel3345]

INFO: HHH000424: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException i m stuck to it .can u please elaborate it sir.

[@emorshall]

my foreign key in child table gets a null value. please help me.

[@simeonmarkov94]

I had the same concern. Apparently cascading cares only about creating the child table and filling its basic data and not its foreign keys automatically.That means if User is cascade, all entity objects attached to him are just being created without their foreign key to that User being populated. You can just call the setter of the child object and set its User( e.g. not only user.getVehicleList().add(vehicle), but vehicle.setUser(user) as well). The point of the cascade was just to save all attached to some parent object child objects without explicitly bothering the session to do that. I hope I could help at least a bit!

[@reachmanav]

I encountered the same problem. Apparently, you'll still need to set the user of the vehicle using setter commands.

[@maxfeldman6654]

Any one knows if this series of tutorial's still relevant for 2021?

[@tgroy1]

Yes it is still relevant in 2021.

[@whyisitsocomplicated2462]

Thanks

[@Betrayed227]

do note this only works if you import javax.persistance.CascadeType; If you use import org.hibernate.CascadeType It will probably not work. I had this issue.

[@dinh_kien8]

very good!, thanks so much! I am from Việt Nam :)

[@AaronEzekiel752]

so do i

[@surajankita1]

give example of cascadetype refresh,detach and merge