The developer wants to define a unidirectional relationship from the customer entity to the order entity and map this relationship using a foreign key mapping strategy. Which one of the pairs of…

The correct answer is A. @Entity public class Customer {. JoinColumnspecifies a column for joining an entity association or element collection. Example: unidirectional one-to-many association using a foreign key mapping // In Customer class @JoinColumn(name="CUST_ID") // join column is in table for Order public Set<Order> getOrders()…

Entity Relationships

Question

The developer wants to define a unidirectional relationship from the customer entity to the order entity and map this relationship using a foreign key mapping strategy. Which one of the pairs of classes below correctly achieves this task?

Options

A@Entity public class Customer {
B@Entity public class Customer {
C@Entity public class Customer {
D@ Entity public class Customer {

How the community answered

(27 responses)

A
81% (22)
B
11% (3)
C
4% (1)
D
4% (1)

Explanation

JoinColumnspecifies a column for joining an entity association or element collection. Example: unidirectional one-to-many association using a foreign key mapping // In Customer class @JoinColumn(name="CUST_ID") // join column is in table for Order public Set<Order> getOrders() {return orders;}

Topics

#OneToMany#unidirectional relationship#foreign key mapping#entity mapping

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