@ManyToOne(optional=false) and @JoinColumn (nullable = false) does not work

Hello

This is probably a question of amateur JPA please excuse me if I'm really naïve here.

I got two objects of entity PixUser and Album [with 1-> M relationship]

@Entity
/ public class PixUser implements Serializable {}
......
@OneToMany (targetEntity = Album.class, mappedBy = "pixUser", cascade = CascadeType.ALL)
The collection < Album > albums = new ArrayList < Album > ();
.....
}

@Entity
Album/public class implements Serializable {}
....
@ManyToOne(fetch=FetchType.EAGER,optional=false)
@JoinColumn (name = "PIXUSER_USERNAME", nullable = false, updatable = true)
Private PixUser pixUser;
.....
}

If I try and persist an Album object without putting the PixUser in the subject of the Album, according to my understanding it should give me an error that "it cannot be null for the ALBUM. The column PIXUSER_USERNAME"or something similar. But instead she creates a line in the database successfully.

Code fragment:
The album album = New Album ("My Album without a PixUser");
albumRepository.persistAlbum (album);

Newspaper clipping:
[TopLink fine]: 2009.11.22 08:08:31.156 - ClientSession (4980331) - connection (19682353) - wire (wire [main, 5, main])-INSERT ATUL. VALUES OF THE ALBUM (ALBUM_ID, CREATION_DATE, MODIFICATION_DATE, ALBUM_NAME, CREATION_USER, MODIFICATION_USER, ALBUM_DESCRIPTION, PIXUSER_USERNAME) (?,?,?,?,?,?,?,?)
link = > [452: 2009-11-22 20:08:30.875, my Album without PixUser, null, null, null, null, null]

Is this a bug or I misunderstood the use of the option & /or nullable correctly?

Thank you
Atul

Hello

The optional options and nullable are indications for the APP provider which are used during the generation DDL. TopLink Essentials is no not no matter what LENGTH validation and past rather through to the database to any set of rules it cause exceptions. This is not a bug but a design decision to reduce the amount of processing needed to be done at the level of the application on each data item. If you have nullable = false set when the database is created, you get an exception when a null value is inserted.

Best regards
Chris

Tags: Fusion Middleware

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