Creo que se debe a su convertidor simple muerto o tal vez a cómo se define la Entidad de elementos (he usado booleano para se excluye y parece funcionar bien sin el convertidor) .
Eso está usando mi versión de la Entidad de artículos :-
@Entity(foreignKeys = @ForeignKey(entity = Category.class,parentColumns = "id", childColumns = "category", onDelete = CASCADE))
public class Items {
@PrimaryKey(autoGenerate = true)
private long id;
private String category;
private boolean isexcluded;
public void setCategory(String category) {
this.category = category;
}
public void setId(long id) {
this.id = id;
}
public void setIsexcluded(boolean isexcluded) {
this.isexcluded = isexcluded;
}
public String getCategory() {
return this.category;
}
public long getId() {
return this.id;
}
public boolean isIsexcluded() {
return this.isexcluded;
}
}
junto con una Categoría DAO de :-
@Dao
interface CategoryDAO {
@Query("SELECT * FROM Category")
List<Category> getAllcategories();
@Query("SELECT DISTINCT Category.* " +
"FROM CATEGORY " +
"INNER JOIN ITEMS ON category.id = Items.category " +
"WHERE isexcluded = 0 " +
"ORDER BY lower(category.name)")
List<Category> getSpeacial();
@Query("SELECT DISTINCT Category.* " +
"FROM CATEGORY " +
"INNER JOIN ITEMS ON category.id = Items.category " +
"WHERE isexcluded = 0 " +
"ORDER BY lower(category.name)")
List<CatViewWithItemList> getSpeacial2();
@Insert
public long[] insertCategory(Category... Category);
}
junto con
new Thread(new Runnable() {
@Override
public void run() {
//mRoomDB.categoryDao().insertCategory(initialCategories());
//mRoomDB.itemsDAO().insertItem(initialItems());
List<Category> categoryList = mRoomDB.categoryDao().getAllcategories();
List<Items> itemsList = mRoomDB.itemsDAO().getAllItems();
for (Category c: categoryList) {
Log.d("CATEGORY","Category is " + c.getName() + " refrence is " + c.getId());
}
for (Items i: itemsList) {
Log.d("ITEM","Item is " + i.getId() + " Category reference is " + i.getCategory() + " Is Excluded is " + Boolean.toString(i.isIsexcluded()));
}
List<Category> categoryList2 = mRoomDB.categoryDao().getSpeacial();
for (Category c: categoryList2) {
Log.d("CATEGORY2","Category is " + c.getName() + " reference is " + c.getId());
}
List<CatViewWithItemList> catViewWithItemLists = mRoomDB.categoryDao().getSpeacial2();
for (CatViewWithItemList cvwil: catViewWithItemLists) {
Log.d("CATVIEWITEM","Category = " + cvwil.myCat.getId() + " ID = " + cvwil.ItemList.get(0).getId() + " IsExcluded = " + Boolean.toString(cvwil.ItemList.get(0).isIsexcluded()));
}
}
}).start();
y con :-
public class CatViewWithItemList {
@Embedded
public Category myCat;
@Relation(parentColumn = "id",
entityColumn = "category")
public List<Items> ItemList;
}
Entonces el resultado es (primera parte los datos subyacentes (oh, así que no puedo deletrear la tercera :))):-
2018-12-19 21:47:05.376 2109-2125/? D/CATEGORY: Category is firstname refrence is a
2018-12-19 21:47:05.377 2109-2125/? D/CATEGORY: Category is secondname refrence is b
2018-12-19 21:47:05.377 2109-2125/? D/CATEGORY: Category is thridname refrence is c
2018-12-19 21:47:05.377 2109-2125/? D/ITEM: Item is 1 Category reference is a Is Excluded is false
2018-12-19 21:47:05.377 2109-2125/? D/ITEM: Item is 2 Category reference is c Is Excluded is false
2018-12-19 21:47:05.377 2109-2125/? D/ITEM: Item is 3 Category reference is null Is Excluded is false
2018-12-19 21:47:05.377 2109-2125/? D/ITEM: Item is 4 Category reference is b Is Excluded is false
2018-12-19 21:47:05.377 2109-2125/? D/ITEM: Item is 5 Category reference is b Is Excluded is true
2018-12-19 21:47:05.378 2109-2125/? D/ITEM: Item is 6 Category reference is null Is Excluded is true
y luego los dos conjuntos de resultados :-
2018-12-19 21:47:05.379 2109-2125/? D/CATEGORY2: Category is firstname reference is a
2018-12-19 21:47:05.380 2109-2125/? D/CATEGORY2: Category is secondname reference is b
2018-12-19 21:47:05.380 2109-2125/? D/CATEGORY2: Category is thridname reference is c
2018-12-19 21:47:05.382 2109-2125/? D/CATVIEWITEM: Category = a ID = 1 IsExcluded = false
2018-12-19 21:47:05.382 2109-2125/? D/CATVIEWITEM: Category = b ID = 4 IsExcluded = false
2018-12-19 21:47:05.382 2109-2125/? D/CATVIEWITEM: Category = c ID = 2 IsExcluded = false
Adicional
Creo que su problema no es con la consulta sino con CatViewItemList en el sentido de que está completando la lista de elementos con todos los elementos relacionados con la categoría independientemente/después de la consulta (también conocido como incrustar la lista de elementos en la categoría). Esto me confundió, ya que realmente solo desea el elemento relacionado específico (acabo de tomar el primero en mi código), p. cvwil.ItemList.get(0).isIsexcluded() y la suerte fue que 4 viene antes que 5, por lo que isexcluded aparece como falso.
Creo que tal vez debería abordar esto desde los elementos, uniéndose a la categoría, p. algo como
SELECT *
FROM Items
JOIN Category ON Items.category = category.id
WHERE Items.isexcluded = 0
ORDER BY category.name ASC;
Actualizaré el código en gitHub para hacer esto (tenga en cuenta que he cambiado la tabla de categorías para tener un nombre de columna único de categoryid en lugar de id.)
los resultados son ahora (observe que se agregó otra categoría y 2 elementos más en orden inverso, es decir, el primer elemento (id 7) se ha excluido como verdadero, luego el id 8 tiene falso) :-
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/CATEGORY: Category is firstname Category ID is a
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/CATEGORY: Category is secondname Category ID is b
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/CATEGORY: Category is thirdname Category ID is c
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/CATEGORY: Category is fourthname Category ID is d
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/ITEM: Item is 1 Category reference is a Is Excluded is false
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/ITEM: Item is 2 Category reference is c Is Excluded is false
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/ITEM: Item is 3 Category reference is null Is Excluded is false
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/ITEM: Item is 4 Category reference is b Is Excluded is false
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/ITEM: Item is 5 Category reference is b Is Excluded is true
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/ITEM: Item is 6 Category reference is null Is Excluded is true
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/ITEM: Item is 7 Category reference is d Is Excluded is true
2018-12-20 21:39:56.971 9136-9160/so53839431.so53839431roomrelationship D/ITEM: Item is 8 Category reference is d Is Excluded is false
2018-12-20 21:39:56.972 9136-9160/so53839431.so53839431roomrelationship D/ITEMWITHCAT: Item id =1 Category reference is a Is Excluded is false Referenced Category is a Referenced Category name is firstname
2018-12-20 21:39:56.972 9136-9160/so53839431.so53839431roomrelationship D/ITEMWITHCAT: Item id =2 Category reference is c Is Excluded is false Referenced Category is c Referenced Category name is thirdname
2018-12-20 21:39:56.972 9136-9160/so53839431.so53839431roomrelationship D/ITEMWITHCAT: Item id =4 Category reference is b Is Excluded is false Referenced Category is b Referenced Category name is secondname
2018-12-20 21:39:56.972 9136-9160/so53839431.so53839431roomrelationship D/ITEMWITHCAT: Item id =8 Category reference is d Is Excluded is false Referenced Category is d Referenced Category name is fourthname
