Part 24 - Delete Request from Angular to Node
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2 жыл бұрынThis is Part 24 of a step by step tutorial on how to build a complete application using Angular, Node.js and PostgreSQL/MongoDB.
In this part, we would make a DELETE request to delete a record.
FleetMS Tutorial here - bit.ly/3Hhvme4
FleetMSv2 Tutorial here - bit.ly/3vzz0M3
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@babacardieng1463 Жыл бұрын
Good Job, God bless..I'm having trouble when I try to remove a "parent" entity due its children references due a data integrity violation. I supposed the error is related to some missing configuration of the entities, but I cannot get what is missing. Is it possible to let understand to Hibernate/JPA to delete the children reference before and then the parent? I would like to keep using this relation and the Spring Data JPA repositories.
@KindsonTheTechPro Жыл бұрын
(For Hibernate in FleetMS v2, you can do it in your entity) ON DELETE CASCADE option is to specify whether you want rows deleted in a child table when corresponding rows are deleted in the parent table. If you do not specify cascading deletes, the default behaviour of the database server prevents you from deleting data in a table if other tables reference it. If you want to use Fleetmsv2, then you need to modify the annotation of the states attributes of the country entity like so @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.EAGER, mappedBy = "country") @OnDelete(action = OnDeleteAction.CASCADE) This should create the states table in hibernate with the ON DELETE CASCADE constraint. Let me know if this solved the problem
@babacardieng1463 Жыл бұрын
I flow thé series FleetMs V2 but i have issues to delete parent entity
@KindsonTheTechPro Жыл бұрын
(For Hibernate in FleetMS v2, you can do it in your entity) ON DELETE CASCADE option is to specify whether you want rows deleted in a child table when corresponding rows are deleted in the parent table. If you do not specify cascading deletes, the default behaviour of the database server prevents you from deleting data in a table if other tables reference it. If you want to use Fleetmsv2, then you need to modify the annotation of the states attributes of the country entity like so @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.EAGER, mappedBy = "country") @OnDelete(action = OnDeleteAction.CASCADE) This should create the states table in hibernate with the ON DELETE CASCADE constraint. Let me know if this solved the problem
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