@OneToMany and @ManyToOne | Together Java | Page 1

molten dagger Sep 19, 2023, 12:57 PM

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Is this right I am just trying it out
I new to JPA (Well known with Relational DB concepts) cat_thumbs_up

stark sandalBOT Sep 19, 2023, 12:57 PM

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<@&987246841693360200> please have a look, thanks.

stark sandalBOT Sep 19, 2023, 12:57 PM

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stark sandal <@&987246841693360200> please have a look, thanks.

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Yes, you are on the right track! In Java, the Spring framework provides support for working with databases using JPA (Java Persistence API). JPA is a specification that allows you to map Java objects to relational database tables.

The @OneToMany and @ManyToOne annotations are used to define relationships between entities in JPA.

@OneToMany is used to define a one-to-many relationship between two entities. For example, if you have an entity called "Author" and another entity called "Book", you can use @OneToMany on the Author entity to indicate that an author can have multiple books.
@ManyToOne is used to define a many-to-one relationship between two entities. Continuing with the previous example, you can use @ManyToOne on the Book entity to indicate that multiple books can belong to a single author.

These annotations help in mapping the relationships between entities in your application's data model. They allow you to navigate and query related entities easily.

It's great that you are familiar with relational database concepts as it will help you understand how these relationships are represented in the database schema.

Keep exploring and experimenting with JPA and Spring!

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Changed the category to Database.

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<@&987246584574140416> please have a look, thanks.

arctic plaza Sep 19, 2023, 1:15 PM

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molten dagger Is this right I am just trying it out I new to JPA (Well known with Relational ...

hi! Check this

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https://www.tutorialspoint.com/jpa/jpa_entity_relationships.htm

JPA - Entity Relationships

JPA Entity Relationships - This chapter takes you through the relationships between Entities. Generally the relations are more effective between tables in the database. Here the entity classes are treated as relational tables (concept of JPA), therefore the relationships between Entity classes are as follows:

molten dagger Sep 19, 2023, 1:17 PM

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arctic plaza hi! Check this

Got itt!!!

molten dagger Sep 19, 2023, 1:35 PM

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how should I make a constructor for pathList?