I have two classes :
UniteStratigraphique.java :
@DatabaseTable(tableName = "unitestratigraphique")
public class UniteStratigraphique {
public final static String ID_FIELD_NAME = "id";
@DatabaseField(generatedId = true, columnName = ID_FIELD_NAME)
private int id;
// CAMPAGNES
@DatabaseField(foreign = true, foreignAutoRefresh = true)
private Campagne campagne;
@ForeignCollectionField
private ForeignCollection<Campagne> listeCampagnes;
public UniteStratigraphique() {}
public Campagne getCampagne() {
return campagne;
}
public void setCampagne(Campagne campagne) {
this.campagne = campagne;
}
public ArrayList<Campagne> getListeCampagnes() {
ArrayList<Campagne> campagnesArray = new ArrayList<Campagne>();
for (Campagne campagne : listeCampagnes) {
campagnesArray.add(campagne);
}
return campagnesArray;
}
public ForeignCollection<Campagne> getListeCampagnesForeign() {
return listeCampagnes;
}
public void setListeCampagnes(ForeignCollection<Campagne> listeCampagnes) {
this.listeCampagnes = listeCampagnes;
}
}
Campagne.java :
@DatabaseTable(tableName = "campagne")
public class Campagne {
@DatabaseField(generatedId = true)
private int id;
// UNITE STRATIGRAPHIQUE
@ForeignCollectionField
private ForeignCollection<UniteStratigraphique> listeUniteStratigraphique;
@DatabaseField(foreign = true, foreignAutoRefresh = true)
private UniteStratigraphique uniteStratigraphique;
public Campagne() {}
public ArrayList<UniteStratigraphique> getListeUniteStratigraphique() {
ArrayList<UniteStratigraphique> usArray = new ArrayList<UniteStratigraphique>();
for (UniteStratigraphique us : listeUniteStratigraphique){
usArray.add(us);
}
return usArray;
}
public ForeignCollection<UniteStratigraphique> getListeUniteStratigraphiqueForeign() {
return listeUniteStratigraphique;
}
public void setListeUniteStratigraphique(
ForeignCollection<UniteStratigraphique> listeUniteStratigraphique) {
this.listeUniteStratigraphique = listeUniteStratigraphique;
}
public int getSizeListeUniteStratigraphique() {
return listeUniteStratigraphique.size();
}
public UniteStratigraphique getUniteStratigraphique() {
return uniteStratigraphique;
}
public void setUniteStratigraphique(UniteStratigraphique uniteStratigraphique) {
this.uniteStratigraphique = uniteStratigraphique;
}
}
As you can see, these are Many-To-Many linked (0...n---0...n, with ORMLite annotations).
Now, my workflow is :
I create multiple "UniteStratigraphique" classes and I store them into my database (this works fine).
=> So I have n * "UniteStratigraphique" stored.
After that what I want is to create a "Campagne" class wich will contain multiple "UniteStratigraphique" classes.
=> So I want to set this field from "Campagne.java" :
@ForeignCollectionField
private ForeignCollection<UniteStratigraphique> listeUniteStratigraphique;
with the n * "UniteStratigraphique" elements I just stored before.
I tried to do this with this DAO method but it only duplicate the "UniteStratigraphique" classes into my db and no link is made..
public void addUsToCampagne(Campagne campagne,
ArrayList<UniteStratigraphique> usArray) {
ForeignCollection<UniteStratigraphique> usForeign = campagne
.getListeUniteStratigraphiqueForeign();
if (usForeign == null) {
try {
usForeign = getHelper().getCampagneDao()
.getEmptyForeignCollection("listeUniteStratigraphique");
for (UniteStratigraphique us : usArray) {
usForeign.add(us);
}
} catch (SQLException e) {
e.printStackTrace();
}
}else{
for (UniteStratigraphique us : usArray) {
usForeign.add(us);
}
}
}
And in my Activity I'm doing this :
db.addCampagne(campagne);
if( myUniteStratigraphiqueArray.size() > 0){
db.addUsToCampagne(campagne, myUniteStratigraphiqueArray);
}
Many to Many relations are non automatic with ORMLite, the only way to achieve it is to make a 3rd Table only for link beetween these 2 classes..
This link refers to this problem : What is the best way to implement many-to-many relationships using ORMLite?
And the example here : https://github.com/j256/ormlite-jdbc/tree/master/src/test/java/com/j256/ormlite/examples/manytomany
Hope it helped.