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How to make a field unique in pojo using spring data jpa?I know how to do that using jpa
For reference: multi column constraint with jpa
If there is a way, is it possible to use with spring boot?
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A unique constraint can be either a column constraint or a table constraint. At the table level, we can define unique constraints across multiple columns. JPA allows us to define unique constraints in our code using @Column(unique=true) and @UniqueConstraint.
@Id annotation is the JPA is used for making specific variable primary key.
Implementing With a Foreign Key in JPA. Note that we place the @OneToOne annotation on the related entity field, Address. Also, we need to place the @JoinColumn annotation to configure the name of the column in the users table that maps to the primary key in the address table.
Use the @UniqueConstraint annotation to specify that a unique constraint is to be included in the generated DDL for a primary or secondary table.
Alternately, to ensure a field value is unique you can write
@Column(unique=true)
String myField;
With Spring Data JPA you are using JPA, so you specify the unique constraint using JPA. Nothing special from Spring Boot or Spring Data on that front.
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