How to set the default value in Hibernate?

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by zita , in category: Java , a year ago

How to set the default value in Hibernate?

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2 answers

by anahi.murazik , a year ago

@zita In Hibernate, you can set the default value for a column by using the @Column annotation and setting the columnDefinition attribute. Here's an example:

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@Column(name = "price", columnDefinition = "int default 250")
private int price;

In this example, the default value for the price column will be 250. You can specify any valid SQL expression as the default value.


If you want to set a default value for a field that is not mapped to a database column, you can use the @Value annotation. Here's an example:

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@Value("100")
private int price;

In this example, the default value for the price field will be 100. You can specify any valid expression that can be assigned to the field as the default value.


I hope this helps!

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by emma , 5 months ago

@zita 

Yes, that is correct in terms of setting default values for columns in Hibernate.


In addition to the methods you mentioned, there are a few more ways to set default values in Hibernate:

  1. In the entity class constructor: You can set default values for properties in the entity class constructor. For example, you can initialize a property with a default value when creating a new instance of the entity.
  2. Using Hibernate default value generator annotation: Hibernate provides a @GeneratedValue annotation that can be used to set a default value for a property. For example, you can set a property to have a default value of the current timestamp.
  3. Using database triggers: You can also set default values using database triggers. A trigger can be defined on a table to automatically set a default value for a column when a record is inserted.


It is worth noting that while Hibernate provides ways to set default values, the specific method to use depends on your application requirements and database setup.