How to mapping array in YAPdatabase object? - objective-c

Question

i have test array with objects structure - Group with (NSMutableArray)items, and i save group in YapDatabase
-(void)parseAndSaveJson:(id) json withCompleteBlock:(void(^)())completeBlock{
NSMutableArray *groupsArray = (NSMutableArray *)json;
if (groupsArray != nil) {
YapDatabaseConnection *connectnion = [[DatabaseManager sharedYapDatabase] newConnection];
[connectnion asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
for (int groupIndex = 0; groupIndex < [groupsArray count]; groupIndex ++) {
LocalGroupsExercise *localGroup = [[LocalGroupsExercise alloc] init];
localGroup.name = groupsArray[groupIndex][LOCAL_GROUPS_NAME];
localGroup.tagColor = groupsArray[groupIndex][LOCAL_GROUPS_TAG_COLOR];
localGroup.idGroup = [groupsArray[groupIndex][LOCAL_GROUPS_ID_GROUP] intValue];
if (groupsArray[groupIndex][LOCAL_GROUPS_EXERCISES] != nil) {
NSMutableArray *exerciseArray = (NSMutableArray *)groupsArray[groupIndex][LOCAL_GROUPS_EXERCISES];
for (int exerciseIndex = 0; exerciseIndex < [exerciseArray count]; exerciseIndex ++) {
LocalExercise *localExercise = [[LocalExercise alloc] init];
localExercise.name = exerciseArray[exerciseIndex][EXERCISE_NAME];
localExercise.exerciseId = [exerciseArray[exerciseIndex][LOCAL_EXERCISE_ID_EXERCISE] intValue];
localExercise.groupId = localGroup.idGroup;
localExercise.type = [exerciseArray[exerciseIndex][EXERCISE_TYPE] intValue];
localExercise.minWeight = [exerciseArray[exerciseIndex][EXERCISE_MIN_WEIGHT] floatValue];
localExercise.maxWeight = [exerciseArray[exerciseIndex][EXERCISE_MAX_WEIGHT] floatValue];
localExercise.minReps = [exerciseArray[exerciseIndex][EXERCISE_MIN_REPS] intValue];
localExercise.maxReps = [exerciseArray[exerciseIndex][EXERCISE_MAX_REPS] intValue];
localExercise.minTimer = [exerciseArray[exerciseIndex][EXERCISE_MIN_TIMER] intValue];
localExercise.maxTimer = [exerciseArray[exerciseIndex][EXERCISE_MAX_TIMER] intValue];
localExercise.timeRelax = [exerciseArray[exerciseIndex][EXERCISE_RELAX_TIME] intValue];
[localGroup.exercises addObject:localExercise];
}
}
[transaction setObject:localGroup forKey:[NSString stringWithFormat:#"%d", localGroup.idGroup] inCollection:LOCAL_GROUPS_CLASS_NAME];
}
YapDatabaseConnection *connectnion = [[DatabaseManager sharedYapDatabase] newConnection];
[connectnion readWithBlock:^(YapDatabaseReadTransaction *transaction) {
LocalGroupsExercise *group = [transaction objectForKey:#"2" inCollection:LOCAL_GROUPS_CLASS_NAME];
NSLog(#"%#", group.name);
NSLog(#"%#", group.tagColor);
NSLog(#"%#", group.exercises);
}];
} completionBlock:^{
completeBlock();
}];
}
}
+ (YapDatabaseView *)setupDatabaseViewForShowGroupsGyms{
YapDatabaseViewGrouping *grouping = [YapDatabaseViewGrouping withObjectBlock:^NSString *(YapDatabaseReadTransaction *transaction, NSString *collection, NSString *key, id object) {
if ([object isKindOfClass:[LocalGroupsExercise class]]) {
LocalGroupsExercise *groupExercise = (LocalGroupsExercise *)object;
return [NSString stringWithFormat:#"%#", groupExercise.name];
}
return nil;
}];
YapDatabaseViewSorting *sorting = [YapDatabaseViewSorting withObjectBlock:^NSComparisonResult(YapDatabaseReadTransaction *transaction, NSString *group, NSString *collection1, NSString *key1, LocalGroupsExercise *obj1, NSString *collection2, NSString *key2, LocalGroupsExercise *obj2) {
return [obj1.name compare:obj2.name options:NSNumericSearch range:NSMakeRange(0, obj1.name.length)];
}];
YapDatabaseView *databaseView = [[YapDatabaseView alloc] initWithGrouping:grouping sorting:sorting versionTag:#"0"];
return databaseView;
}
[[DatabaseManager sharedYapDatabase] registerExtension:self.databaseGroupView withName:LOCAL_GROUPS_CLASS_NAME];
[_connection beginLongLivedReadTransaction];
self.mappingsGroup = [[YapDatabaseViewMappings alloc] initWithGroupFilterBlock:^BOOL(NSString *group, YapDatabaseReadTransaction *transaction) {
return true;
} sortBlock:^NSComparisonResult(NSString *group1, NSString *group2, YapDatabaseReadTransaction *transaction) {
return [group1 compare:group2];
} view:LOCAL_GROUPS_CLASS_NAME];
[_connection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
[self.mappingsGroup updateWithTransaction:transaction];
}];
The problem is that the group be NSMutabblArray and I want to see the objects in the table of the array, but [self.mappingsGroup numberOfItemsInSection:section] return only one items in group

Answer 1

You need to configure YapDatabase to use Mantle. By default, it will use NSCoding. (Which is why you're seeing an error about "encodeWithCoder:", as that method is part of NSCoding.)
Take a look at YapDatabase's wiki article entitled "Storing Objects", which talks about how it uses the serializer/deserializer blocks: https://github.com/yaptv/YapDatabase/wiki/Storing-Objects
Basically, when you alloc/init your YapDatabase instance, you'll want to pass a serializer & deserializer block that uses Mantle to perform the serialization/deserialization.
Also, see the various init methods that are available for YapDatabase: https://github.com/yaptv/YapDatabase/blob/master/YapDatabase/YapDatabase.h