JPA (EBeans) Errors with Relations - html

Question

First of all I am programming a webapplication with Playframework 2.2.2 which is using Ebeans.
I will start with the code because then it is easier to explain what my problem is:
This is one of my models:
#Entity
public class Topic extends Model {
#Id
private String title;
private String description;
#ManyToOne
private User createdBy;
private Integer popular;
#Formats.DateTime(pattern="dd/MM/yyyy")
private Date created;
private boolean over18;
#ManyToMany(cascade = CascadeType.REMOVE)
private List<Tag> tags;
}
The model has this method:
/**
* Return the number of opinions that exist on a specific Topic
*/
public int countOpinions() {
return Opinion.find.where().eq("topic", this).findRowCount();
}
This is my second relevant model:
#Entity
public class Opinion extends Model {
#Id
private Long opinionId;
#Constraints.Pattern("pos|neg|neut")
private String type;
#ManyToOne
private Topic topic;
#ManyToOne
private User user;
private int rating;
private String text;
private boolean reported;
#ManyToOne
private Opinion parent;
}
containing this static method
public static Model.Finder<Long, Opinion> find = new Model.Finder<Long, Opinion>(Long.class, Opinion.class);
Here we have the call in the HTML
#topics.map { topic =>
<th scope="col" id="name">#topic.getTitle()</th>
<th scope="col" id="description">#topic.getDescription()</th>
<th scope="col" id="opinions">#topic.countOpinions()</th>
}
Problem:
Ok so the countOpinions() is not working correctly. I created some testvalues, which should show the value 2 for a specific test Topic, but it shows the value 0. Im not sure how Ebeans is saving those fields with a type that I have created for myself, but afaik it should work like this.
I have tried already to override the equals methods in the Models, cause I figured it may be used, but apparently it isnt.
Thx for every help.

Answer 1

I tested it quickly, works fine
private FakeApplication fakeApplication;
#Before
public void setup() {
fakeApplication = fakeApplication(inMemoryDatabase());
start(fakeApplication);
}
#After
public void tearDown() {
stop(fakeApplication);
}
#Test
public void countOpinionsTest() {
// given
Topic topic = new Topic();
topic.setTitle("test");
topic.save();
Opinion opinion1 = new Opinion();
opinion1.setOpinionId((long) 1);
opinion1.save();
Opinion opinion2 = new Opinion();
opinion2.setOpinionId((long) 2);
opinion2.save();
// when
opinion1.setTopic(topic);
opinion1.update();
opinion2.setTopic(topic);
opinion2.update();
// then
assertThat(topic.countOpinions()).isEqualTo(2);
}
Do you have your ebean config set and the entity in the according package (here models)?
db.default.driver=org.h2.Driver
db.default.url="jdbc:h2:mem:play"
ebean.default="models.*"