removed unnessesary m:n between cards and stack

16 files changed, 87 insertions, 138 deletions

diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/api/JsonToEntityParser.java b/app/src/main/java/it/niedermann/nextcloud/deck/api/JsonToEntityParser.java
index c08a0bfc7..09c2daaa5 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/api/JsonToEntityParser.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/api/JsonToEntityParser.java
@@ -106,7 +106,7 @@ public class JsonToEntityParser {
         JsonElement owner = e.get("owner");
         if (owner != null) {
             if (owner.isJsonPrimitive()) {//TODO: remove if, let only else!
-                Log.d(DeckConsts.DEBUG_TAG, "owner is Primitive, skipping");
+                DeckLog.log("owner is Primitive, skipping");
             } else
                 fullCard.setOwner(parseUser(owner.getAsJsonObject()));
         }
@@ -134,13 +134,11 @@ public class JsonToEntityParser {
         stack.setOrder(e.get("order").getAsInt());
         if (e.has("cards")) {
             JsonArray cardsJson = e.getAsJsonArray("cards");
-            List<FullCard> cards = new ArrayList<>();
-            List<Long> cardIds = new ArrayList<>();
+            List<Card> cards = new ArrayList<>();
             for (JsonElement cardJson : cardsJson) {
-//                cards.add(parseCard(cardJson.getAsJsonObject()));
-                cardIds.add(cardJson.getAsJsonObject().get("id").getAsLong());
+                cards.add(parseCard(cardJson.getAsJsonObject()).getCard());
             }
-            fullStack.setCards(cardIds);
+            fullStack.setCards(cards);
         }
         fullStack.setStack(stack);
 //        stack.setDeletedAt(e.get("deletedAt")) // TODO: parse date!
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/model/Card.java b/app/src/main/java/it/niedermann/nextcloud/deck/model/Card.java
index f15b41c1c..1fbdc34b1 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/model/Card.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/model/Card.java
@@ -16,28 +16,16 @@ public class Card extends AbstractRemoteEntity {
     private String title;
     private String description;
     @NonNull
-//    @Index
     private long stackId;
-    //    @ToOne(joinProperty = "stackId")
-//    protected Stack stack;
     private String type;
     private Date createdAt;
     private Date deletedAt;
-    //    @ToMany
-//    @JoinEntity(entity = JoinCardWithLabel.class, sourceProperty = "cardId", targetProperty = "labelId")
-//    private List<Label> labels = new ArrayList<>();
-//    @ToMany
-//    @JoinEntity(entity = JoinCardWithUser.class, sourceProperty = "cardId", targetProperty = "userId")
     private String attachments;
     private int attachmentCount;
 
     private Long userId;
-    //    @ToOne(joinProperty = "userId")
-//    private User owner;
-//    @Index
     @NonNull
     private int order;
-    //    @Index
     private boolean archived;
     private Date dueDate;
     private boolean notified;
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/model/JoinStackWithCard.java b/app/src/main/java/it/niedermann/nextcloud/deck/model/JoinStackWithCard.java
deleted file mode 100644
index e286883eb..000000000
--- a/app/src/main/java/it/niedermann/nextcloud/deck/model/JoinStackWithCard.java
+++ /dev/null
@@ -1,40 +0,0 @@
-package it.niedermann.nextcloud.deck.model;
-
-import android.arch.persistence.room.Entity;
-import android.arch.persistence.room.ForeignKey;
-import android.arch.persistence.room.Index;
-import android.support.annotation.NonNull;
-
-@Entity(
-        primaryKeys = {"stackId", "cardId"},
-        indices = {@Index("cardId"), @Index("stackId")},
-        foreignKeys = {
-                @ForeignKey(entity = Stack.class,
-                        parentColumns = "localId",
-                        childColumns = "stackId"),
-                @ForeignKey(entity = Card.class,
-                        parentColumns = "localId",
-                        childColumns = "cardId")
-        })
-public class JoinStackWithCard {
-    @NonNull
-    private Long stackId;
-    @NonNull
-    private Long cardId;
-
-    public Long getStackId() {
-        return stackId;
-    }
-
-    public void setStackId(Long stackId) {
-        this.stackId = stackId;
-    }
-
-    public Long getCardId() {
-        return cardId;
-    }
-
-    public void setCardId(Long cardId) {
-        this.cardId = cardId;
-    }
-}
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/model/full/FullCard.java b/app/src/main/java/it/niedermann/nextcloud/deck/model/full/FullCard.java
index 57b1b7c85..4be2c2a16 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/model/full/FullCard.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/model/full/FullCard.java
@@ -8,6 +8,8 @@ import java.util.ArrayList;
 import java.util.List;
 
 import it.niedermann.nextcloud.deck.model.Card;
+import it.niedermann.nextcloud.deck.model.JoinCardWithLabel;
+import it.niedermann.nextcloud.deck.model.JoinCardWithUser;
 import it.niedermann.nextcloud.deck.model.Label;
 import it.niedermann.nextcloud.deck.model.User;
 import it.niedermann.nextcloud.deck.model.interfaces.IRemoteEntity;
@@ -16,10 +18,17 @@ public class FullCard implements IRemoteEntity {
     @Embedded
     public Card card;
 
-    @Relation(entity = Label.class, parentColumn = "localId", entityColumn = "localId")
+    @Relation(entity = JoinCardWithLabel.class, parentColumn = "localId", entityColumn = "cardId", projection = "labelId")
+    public List<Long> labelIDs;
+
+    @Ignore
     public List<Label> labels;
 
-    @Relation(entity = User.class, parentColumn = "localId", entityColumn = "localId")
+
+    @Relation(entity = JoinCardWithUser.class, parentColumn = "localId", entityColumn = "cardId", projection = "userId")
+    public List<Long> assignedUserIDs;
+
+    @Ignore
     public List<User> assignedUsers;
 
     @Relation(parentColumn = "userId", entityColumn = "localId")
@@ -53,6 +62,22 @@ public class FullCard implements IRemoteEntity {
         return owner;
     }
 
+    public List<Long> getAssignedUserIDs() {
+        return assignedUserIDs;
+    }
+
+    public void setAssignedUserIDs(List<Long> assignedUserIDs) {
+        this.assignedUserIDs = assignedUserIDs;
+    }
+
+    public List<Long> getLabelIDs() {
+        return labelIDs;
+    }
+
+    public void setLabelIDs(List<Long> labelIDs) {
+        this.labelIDs = labelIDs;
+    }
+
     public void setOwner(User owner) {
         List<User> user = new ArrayList<>();
         user.add(owner);
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/model/full/FullStack.java b/app/src/main/java/it/niedermann/nextcloud/deck/model/full/FullStack.java
index 8b966d693..83b081936 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/model/full/FullStack.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/model/full/FullStack.java
@@ -6,7 +6,7 @@ import android.arch.persistence.room.Relation;
 
 import java.util.List;
 
-import it.niedermann.nextcloud.deck.model.JoinStackWithCard;
+import it.niedermann.nextcloud.deck.model.Card;
 import it.niedermann.nextcloud.deck.model.Stack;
 import it.niedermann.nextcloud.deck.model.interfaces.IRemoteEntity;
 
@@ -14,8 +14,8 @@ public class FullStack implements IRemoteEntity {
     @Embedded
     public Stack stack;
 
-    @Relation(entity =  JoinStackWithCard.class, parentColumn = "localId", entityColumn = "stackId", projection = "cardId")
-    public List<Long> cards;
+    @Relation(entity =  Card.class, parentColumn = "localId", entityColumn = "stackId")
+    public List<Card> cards;
 
 
     public Stack getStack() {
@@ -26,11 +26,11 @@ public class FullStack implements IRemoteEntity {
         this.stack = stack;
     }
 
-    public List<Long> getCards() {
+    public List<Card> getCards() {
         return cards;
     }
 
-    public void setCards(List<Long> cards) {
+    public void setCards(List<Card> cards) {
         this.cards = cards;
     }
 
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/SyncManager.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/SyncManager.java
index 96080105a..0a68eaa07 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/SyncManager.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/SyncManager.java
@@ -175,6 +175,7 @@ public class SyncManager {
     }
 
     public LiveData<List<FullCard>> getFullCardsForStack(long accountId, long localStackId) {
+
         return dataBaseAdapter.getFullCardsForStack(accountId, localStackId);
     }
 
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DataBaseAdapter.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DataBaseAdapter.java
index 96dcbed81..2ef8436e0 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DataBaseAdapter.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DataBaseAdapter.java
@@ -12,7 +12,6 @@ import it.niedermann.nextcloud.deck.model.Card;
 import it.niedermann.nextcloud.deck.model.JoinBoardWithLabel;
 import it.niedermann.nextcloud.deck.model.JoinCardWithLabel;
 import it.niedermann.nextcloud.deck.model.JoinCardWithUser;
-import it.niedermann.nextcloud.deck.model.JoinStackWithCard;
 import it.niedermann.nextcloud.deck.model.Label;
 import it.niedermann.nextcloud.deck.model.Stack;
 import it.niedermann.nextcloud.deck.model.User;
@@ -74,7 +73,28 @@ public class DataBaseAdapter {
     }
 
     public FullCard getFullCardByRemoteIdDirectly(long accountId, long remoteId) {
-        return db.getCardDao().getFullCardByRemoteIdDirectly(accountId, remoteId);
+        FullCard card = db.getCardDao().getFullCardByRemoteIdDirectly(accountId, remoteId);
+        readRelationsForCard(card);
+        return card;
+    }
+
+    private void readRelationsForCard(FullCard card) {
+        if (card != null){
+            if (card.getLabelIDs() != null && !card.getLabelIDs().isEmpty()){
+                card.setLabels(db.getLabelDao().getLabelsById(card.getLabelIDs()));
+            }
+            if (card.getAssignedUserIDs() != null && !card.getAssignedUserIDs().isEmpty()){
+                card.setAssignedUsers(db.getUserDao().getUsersById(card.getAssignedUserIDs()));
+            }
+        }
+    }
+    private void readRelationsForCard(List<FullCard> card) {
+        if (card == null){
+            return;
+        }
+        for (FullCard c : card) {
+            readRelationsForCard(c);
+        }
     }
 
 
@@ -88,7 +108,11 @@ public class DataBaseAdapter {
     }
 
     public LiveData<List<FullCard>> getFullCardsForStack(long accountId, long localStackId) {
-        return db.getCardDao().getFullCardsForStack(accountId, localStackId);
+        return wrapInLiveData((MutableLiveData<List<FullCard>> liveData) -> {
+            List<FullCard> fullCardsForStack = db.getCardDao().getFullCardsForStackDirectly(accountId, localStackId);
+            readRelationsForCard(fullCardsForStack);
+            liveData.postValue(fullCardsForStack);
+        });
     }
 
     public User getUserByRemoteIdDirectly(long accountId, long remoteId) {
@@ -151,13 +175,6 @@ public class DataBaseAdapter {
     }
 
     
-    public void createJoinStackWithCard(long localCardId, long localStackId) {
-        JoinStackWithCard join = new JoinStackWithCard();
-        join.setCardId(localCardId);
-        join.setStackId(localStackId);
-        db.getJoinStackWithCardDao().insert(join);
-    }
-
     public void createJoinBoardWithLabel(long localBoardId, long localLabelId) {
         JoinBoardWithLabel join = new JoinBoardWithLabel();
         join.setBoardId(localBoardId);
@@ -170,14 +187,6 @@ public class DataBaseAdapter {
         db.getJoinBoardWithLabelDao().deleteByBoardId(localBoardId);
     }
     
-    public void deleteJoinedCardsForStack(long localStackId) {
-        db.getJoinStackWithCardDao().deleteByStackId(localStackId);
-    }
-    public void deleteJoinedCardForStackById(long localCardId) {
-        db.getJoinStackWithCardDao().deleteByCardId(localCardId);
-    }
-
-    
     public void updateLabel(Label label) {
         db.getLabelDao().update(label);
     }
@@ -233,6 +242,10 @@ public class DataBaseAdapter {
             liveData.postValue(newBoard);
         });
     }
+    public void createBoardDirectly(long accountId, Board board) {
+            board.setAccountId(accountId);
+            db.getBoardDao().insert(board);
+    }
 
     
     public void deleteBoard(Board board) {
@@ -294,7 +307,6 @@ public class DataBaseAdapter {
     
     public void updateCard(Card card) {
         db.getCardDao().update(card);
-
     }
 
 
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DeckDatabase.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DeckDatabase.java
index 606420f00..aa60733d9 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DeckDatabase.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/DeckDatabase.java
@@ -14,7 +14,6 @@ import it.niedermann.nextcloud.deck.model.JoinBoardWithPermission;
 import it.niedermann.nextcloud.deck.model.JoinBoardWithUser;
 import it.niedermann.nextcloud.deck.model.JoinCardWithLabel;
 import it.niedermann.nextcloud.deck.model.JoinCardWithUser;
-import it.niedermann.nextcloud.deck.model.JoinStackWithCard;
 import it.niedermann.nextcloud.deck.model.Label;
 import it.niedermann.nextcloud.deck.model.Permission;
 import it.niedermann.nextcloud.deck.model.Stack;
@@ -27,7 +26,6 @@ import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.JoinBoardWi
 import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.JoinBoardWithUserDao;
 import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.JoinCardWithLabelDao;
 import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.JoinCardWithUserDao;
-import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.JoinStackWithCardDao;
 import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.LabelDao;
 import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.PermissionDao;
 import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.StackDao;
@@ -43,7 +41,6 @@ import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao.UserDao;
                 JoinBoardWithUser.class,
                 JoinCardWithLabel.class,
                 JoinCardWithUser.class,
-                JoinStackWithCard.class,
                 Label.class,
                 Permission.class,
                 Stack.class,
@@ -90,8 +87,6 @@ public abstract class DeckDatabase extends RoomDatabase {
 
     public abstract JoinCardWithUserDao getJoinCardWithUserDao();
 
-    public abstract JoinStackWithCardDao getJoinStackWithCardDao();
-
     public abstract LabelDao getLabelDao();
 
     public abstract PermissionDao getPermissionDao();
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/CardDao.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/CardDao.java
index aa6d43190..6ba8e3e76 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/CardDao.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/CardDao.java
@@ -29,6 +29,10 @@ public interface CardDao extends GenericDao<Card> {
     LiveData<List<FullCard>> getFullCardsForStack(final long accountId, final long localStackId);
 
     @Transaction
+    @Query("SELECT * FROM card WHERE accountId = :accountId AND stackId = :localStackId order by `order`, createdAt asc")
+    List<FullCard> getFullCardsForStackDirectly(final long accountId, final long localStackId);
+
+    @Transaction
     @Query("SELECT * FROM card WHERE accountId = :accountId and localId = :localCardId")
     LiveData<FullCard> getFullCardByLocalId(final long accountId, final long localCardId);
 
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/JoinStackWithCardDao.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/JoinStackWithCardDao.java
deleted file mode 100644
index 7eba32174..000000000
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/JoinStackWithCardDao.java
+++ /dev/null
@@ -1,16 +0,0 @@
-package it.niedermann.nextcloud.deck.persistence.sync.adapters.db.dao;
-
-import android.arch.persistence.room.Dao;
-import android.arch.persistence.room.Query;
-
-import it.niedermann.nextcloud.deck.model.JoinStackWithCard;
-
-@Dao
-public interface JoinStackWithCardDao extends GenericDao<JoinStackWithCard> {
-    @Query("DELETE FROM joinstackwithcard WHERE stackId = :localStackId")
-    void deleteByStackId(long localStackId);
-
-    @Query("DELETE FROM joinstackwithcard WHERE cardId = :localCardId")
-    void deleteByCardId(long localCardId);
-}
-
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/LabelDao.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/LabelDao.java
index ec0b8e427..bc6fd56a9 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/LabelDao.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/LabelDao.java
@@ -4,6 +4,8 @@ import android.arch.lifecycle.LiveData;
 import android.arch.persistence.room.Dao;
 import android.arch.persistence.room.Query;
 
+import java.util.List;
+
 import it.niedermann.nextcloud.deck.model.Label;
 
 @Dao
@@ -18,4 +20,6 @@ public interface LabelDao extends GenericDao<Label> {
     @Query("SELECT * FROM label WHERE accountId = :accountId and id = :remoteId")
     Label getLabelByRemoteIdDirectly(final long accountId, final long remoteId);
 
+    @Query("SELECT * FROM label WHERE localId IN (:labelIDs)")
+    List<Label> getLabelsById(List<Long> labelIDs);
 }
\ No newline at end of file
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/UserDao.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/UserDao.java
index c3ffa96ad..291124a5d 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/UserDao.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/adapters/db/dao/UserDao.java
@@ -23,4 +23,6 @@ public interface UserDao extends GenericDao<User> {
     @Query("SELECT * FROM user WHERE accountId = :accountId and uid = :uid")
     User getUserByUidDirectly(final long accountId, final String uid);
 
+    @Query("SELECT * FROM user WHERE localId IN (:assignedUserIDs)")
+    List<User> getUsersById(List<Long> assignedUserIDs);
 }
\ No newline at end of file
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/BoardDataProvider.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/BoardDataProvider.java
index 7e0b7d26d..7862f6747 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/BoardDataProvider.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/BoardDataProvider.java
@@ -23,7 +23,7 @@ public class BoardDataProvider implements IDataProvider<FullBoard> {
     @Override
     public void createInDB(DataBaseAdapter dataBaseAdapter, long accountId, FullBoard entity) {
         handleOwner(dataBaseAdapter, accountId, entity);
-        dataBaseAdapter.createBoard(accountId, entity.getBoard());
+        dataBaseAdapter.createBoardDirectly(accountId, entity.getBoard());
     }
 
     private void handleOwner(DataBaseAdapter dataBaseAdapter, long accountId, FullBoard entity) {
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/CardDataProvider.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/CardDataProvider.java
index 1290951b5..7d7cd61e4 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/CardDataProvider.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/CardDataProvider.java
@@ -5,6 +5,7 @@ import java.util.List;
 
 import it.niedermann.nextcloud.deck.api.IResponseCallback;
 import it.niedermann.nextcloud.deck.model.Board;
+import it.niedermann.nextcloud.deck.model.Card;
 import it.niedermann.nextcloud.deck.model.User;
 import it.niedermann.nextcloud.deck.model.full.FullCard;
 import it.niedermann.nextcloud.deck.model.full.FullStack;
@@ -24,12 +25,13 @@ public class CardDataProvider implements IDataProvider<FullCard> {
 
     @Override
     public void getAllFromServer(ServerAdapter serverAdapter, long accountId, IResponseCallback<List<FullCard>> responder) {
+
         List<FullCard> result = new ArrayList<>();
         if (stack.getCards() == null || stack.getCards().isEmpty()){
             responder.onResponse(result);
         }
-        for (Long card : stack.getCards()) {
-            serverAdapter.getCard(board.getId(), stack.getId(), card, new IResponseCallback<FullCard>(responder.getAccount()) {
+        for (Card card : stack.getCards()) {
+            serverAdapter.getCard(board.getId(), stack.getId(), card.getId(), new IResponseCallback<FullCard>(responder.getAccount()) {
                 @Override
                 public void onResponse(FullCard response) {
                     result.add(response);
@@ -85,7 +87,6 @@ public class CardDataProvider implements IDataProvider<FullCard> {
     public void goDeeper(SyncHelper syncHelper, FullCard existingEntity, FullCard entityFromServer) {
         existingEntity.setLabels(entityFromServer.getLabels());
         existingEntity.setAssignedUsers(entityFromServer.getAssignedUsers());
-        syncHelper.fixRelations(new StackCardRelationshipProvider(stack.getStack(), existingEntity.getCard()));
         syncHelper.doSyncFor(new LabelDataProvider(entityFromServer.getLabels()));
         syncHelper.fixRelations(new CardLabelRelationshipProvider(existingEntity.getCard(), existingEntity.getLabels()));
         syncHelper.doSyncFor(new UserDataProvider(board, stack, existingEntity, existingEntity.getAssignedUsers()));
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/StackCardRelationshipProvider.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/StackCardRelationshipProvider.java
deleted file mode 100644
index 614758644..000000000
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/StackCardRelationshipProvider.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package it.niedermann.nextcloud.deck.persistence.sync.helpers.providers;
-
-import it.niedermann.nextcloud.deck.model.Card;
-import it.niedermann.nextcloud.deck.model.Stack;
-import it.niedermann.nextcloud.deck.persistence.sync.adapters.db.DataBaseAdapter;
-
-public class StackCardRelationshipProvider implements IRelationshipProvider {
-
-    Stack stack;
-    Card card;
-
-    public StackCardRelationshipProvider(Stack stack, Card card) {
-        this.stack = stack;
-        this.card = card;
-    }
-
-    @Override
-    public void insertAllNecessary(DataBaseAdapter dataBaseAdapter, long accountId) {
-        if (card == null){
-            return;
-        }
-        dataBaseAdapter.createJoinStackWithCard(card.getLocalId(), this.stack.getLocalId());
-    }
-
-    @Override
-    public void deleteAllExisting(DataBaseAdapter dataBaseAdapter, long accountId) {
-        dataBaseAdapter.deleteJoinedCardForStackById(card.getLocalId());
-    }
-}
diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/StackDataProvider.java b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/StackDataProvider.java
index 80f369dee..2dda25b3b 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/StackDataProvider.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/persistence/sync/helpers/providers/StackDataProvider.java
@@ -3,6 +3,7 @@ package it.niedermann.nextcloud.deck.persistence.sync.helpers.providers;
 import java.util.List;
 
 import it.niedermann.nextcloud.deck.api.IResponseCallback;
+import it.niedermann.nextcloud.deck.model.Card;
 import it.niedermann.nextcloud.deck.model.full.FullBoard;
 import it.niedermann.nextcloud.deck.model.full.FullStack;
 import it.niedermann.nextcloud.deck.persistence.sync.adapters.ServerAdapter;
@@ -42,6 +43,9 @@ public class StackDataProvider implements IDataProvider<FullStack> {
     public void goDeeper(SyncHelper syncHelper, FullStack existingEntity, FullStack entityFromServer) {
         existingEntity.setCards(entityFromServer.getCards());
         if (existingEntity.getCards() != null && !existingEntity.getCards().isEmpty()){
+            for (Card card : existingEntity.getCards()) {
+                card.setStackId(existingEntity.getLocalId());
+            }
             syncHelper.doSyncFor(new CardDataProvider(board.getBoard(), existingEntity));
         }
     }