Acredito que seja devido ao seu conversor simples morto ou talvez como a Entidade de Itens é definida (eu usei boolean para éexcluído e parece funcionar bem sem o conversor) .
Isso está usando minha versão da entidade de itens:-
@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;
}
}
juntamente com uma Categoria 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);
}
juntamente com
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();
e com :-
public class CatViewWithItemList {
@Embedded
public Category myCat;
@Relation(parentColumn = "id",
entityColumn = "category")
public List<Items> ItemList;
}
Então o resultado é (parte um os dados subjacentes (oh, então eu não posso soletrar o terceiro :))):-
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
e, em seguida, os dois 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
Acredito que seu problema não seja com a consulta, mas com a CatViewItemList em que você está preenchendo a lista de itens com todos os itens relacionados à categoria, independentemente/após a consulta (também conhecido como eu acho, incorporando a lista de itens na categoria). Isso me confundiu, pois você realmente quer apenas o item relacionado específico (acabei de pegar o 1º no meu código), por exemplo.
cvwil.ItemList.get(0).isIsexcluded() e a sorte foi que 4 vem antes de 5, então o isexcluded aparece como falso. Eu acredito que você talvez deva abordar isso a partir dos Itens, juntando-se à Categoria, por exemplo algo como
SELECT *
FROM Items
JOIN Category ON Items.category = category.id
WHERE Items.isexcluded = 0
ORDER BY category.name ASC;
Eu atualizei o código no gitHub para fazer isso (observe que alterei a tabela Category para ter um nome de coluna exclusivo de categoryid em vez de id.)
os resultados são agora (observe que foi adicionada outra categoria e mais 2 itens na ordem inversa, ou seja, o primeiro item (id 7) foi excluído como verdadeiro, então o id 8 é 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
