many to many and integrity when saving the null
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Published on 2011-03-16T12:59:34Z
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2011/03/16
16:09 UTC
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hibernate
|playframework
I have two classes Software, Tag - they are related by ManyToMany. We CAN NOT create Software without putting the Tag to it.
I want to write a test which check that:
@Test public void createSoftwareWithNullTags() {
List<Tag> tags = null;
Software software = new Software("software1", "description1", tags);
try {
software.save();
fail("tags should not be null");
} catch (Exception ex) {
// NEVER COME HERE !!!
}
}
So, this test fails. I guess it is not good test for that case - because it even do not try to SAVE data to SOFTWARE_TAG table. Of course i could do validation manually but i want implement it with hibernate, using some annotation or something. Is it possible? Or how would you do this?
My entities:
@Entity
public class Tag extends Model {
public String title;
public Tag(String title) {
this.title = title;
}
@ManyToMany(
cascade = {CascadeType.ALL},
mappedBy = "tags",
targetEntity = Software.class
)
public List<Software> softwares;
}
@Entity public class Software extends Model {
public String title;
public String description;
@ManyToOne(optional = false)
public Author author;
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(
name = "SOFTWARE_TAG",
joinColumns = @JoinColumn(name = "Software_id"),
inverseJoinColumns = @JoinColumn(name = "Tag_id")
)
public List<Tag> tags;
public Software(String title, String description, Author author, List<Tag> tags) {
this.title = title;
this.description = description;
this.author = author;
this.tags = tags;
}
}
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