How to set default boolean value in JPA

Question

I have an attribute

private boolean include; 

I would like to set its default value to true, so that in the database it must display True from default. Is this possible in JPA?

Answer 1

As far as i known there is no JPA native solution to provide default values. Here it comes my workaround:

Non database portable solution

@Column(columnDefinition="tinyint(1) default 1") private boolean include; 

Java oriented solution

private boolean include = true; 

Java oriented plus Builder pattern

     @Column(nullable = false)      private Boolean include;      ...      public static class Builder {       private Boolean include = true; // Here it comes your default value       public Builder include (Boolean include ) {       this.include = include ;       return this;      }      // Use the pattern builder whenever you need to persist a new entity.      public MyEntity build() {        MyEntity myEntity = new MyEntity ();        myEntity .setinclude (include );        return myEntity;       } ... } 

This is my favorite and less intrusive. Basically it delegates the task to define the default value to the Builder pattern in your entity.