I'm pretty new to Realm and I'm trying to integrate Realm with Firebase. I'm fetching data using realm using a predicate.
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"isArchived == NO AND userId == %#", [User userId]];
RLMResults *dbrecents = [[Recent objectsWithPredicate:predicate] sortedResultsUsingProperty:FRECENT_LASTMESSAGEDATE ascending:NO];
and my firebase data structure,
my Recent object has the exact same values like in firebase structure,
#property NSString *objectId;
#property NSString *userId;
#property NSString *groupId;
#property NSString *initials;
#property NSString *picture;
#property NSString *description;
#property NSString *members;
#property NSString *password;
#property NSString *type;
#property NSString *fullname;
#property NSString *senderName;
#property NSInteger counter;
#property NSString *lastMessage;
#property NSTimeInterval lastMessageDate;
#property BOOL isArchived;
#property BOOL isDeleted;
#property BOOL message_me;
#property NSTimeInterval createdAt;
#property NSTimeInterval updatedAt;
When I'm retrieving data, the dbrecents is empty. How may I fix this?
Related
I have the following model and I'm using Realm:
#interface GUIRoutineModel : GUIModel # GUIModel is a subclass of RLMObject
#property (nonatomic, retain) NSString *dateCreated;
#property (nonatomic, retain) NSString *dateModified;
#property (nonatomic, retain) NSString *name;
#property (nonatomic, retain) NSString *type;
#property NSInteger userId;
#property int routineId; #also have same issue using NSInteger
#end
When I call:
// Persist to Realm DB
RLMRealm *realm = [RLMRealm defaultRealm];
[realm transactionWithBlock:^{
[realm addObject:routineModel];
}];
I get the following error:
'Property 'routineId' requires a protocol defining the contained type - example: NSNumber<RLMInt>.'
I have tried changing the routineId property to NSNumber<RLMint>, but that didn't work either. Can anyone tell me what I'm doing wrong?
UPDATE:
Here is another version of the model that I have tried:
#interface GUIRoutineModel : GUIModel
#property (nonatomic, retain) NSString *dateCreated;
#property (nonatomic, retain) NSString *dateModified;
#property (nonatomic, retain) NSString *name;
#property (nonatomic, retain) NSString *type;
#property NSInteger userId;
#property NSNumber<RLMInt> *routineId;
#end
The Property requires a protocol defining the contained type error is only generated by Realm for a property of type NSNumber without a protocol annotating the expected concrete type. That means it cannot be generated for either of the model classes you mention. It's likely you have a another routineId property elsewhere in your app that is triggering the error.
I have object
#interface Hourly (CoreDataProperties)
#property (nullable, nonatomic, retain) NSDate *dt;
#property (nullable, nonatomic, retain) NSNumber *temp;
#property (nullable, nonatomic, retain) NSNumber *temp_min;
#property (nullable, nonatomic, retain) NSNumber *temp_max;
#property (nullable, nonatomic, retain) NSNumber *humidity;
#property (nullable, nonatomic, retain) NSNumber *pressure;
#property (nullable, nonatomic, retain) NSString *main;
#property (nullable, nonatomic, retain) NSString *des;
#property (nullable, nonatomic, retain) NSString *icon;
#end
And url
http://api.openweathermap.org/data/2.5/forecast/dayly?lat=35&lon=139&cnt=2
I can' add json to object by jsonmodel pod because weather in list is a array .
#Ngọc Thái:
I don't really understand your question. But, if you want parse from JSON (contain array of objects) to object.
Simple, you can try it: https://github.com/elado/jastor#arrays
Hope this help!
Try my project BWJSONMatcher. It helps you easily convert a json string to NSArray:
NSArray *dataArray = [BWJSONMatcher matchJSON:YOURJSONSTRING withClass:[Hourly class]];
The library is fully opensourced and under MIT license.
I have an objects like the below structure: Transaction has an array of Items. Item has an array of SubItems
#interface Transaction : NSObject
#property (nonatomic, copy) NSString *id;
#property (nonatomic, assign) NSInteger status;
#property (nonatomic, strong) NSArray *items; // array of Item
#end
#interface Item : NSObject
#property (nonatomic, copy) NSString *identifier;
#property (nonatomic, assign) NSInteger price;
#property (nonatomic, strong) NSArray *subitems;
#end
#interface SubItem : NSObject
#property (nonatomic, copy) NSString *name;
#property (nonatomic, assign) NSInteger price;
#end
I would like to create predicate to find name and price of Subitem from NSArray of Transaction
pred = [NSPredicate predicateWithFormat:
#"ANY SELF.%K.%K.%K contains %#",
#"items",
#"subitems",
#"name",
#"MY_SUB_ITEM_NAME"];
This generates the error below.
failed: caught "NSInvalidArgumentException", "Can't do regex matching
on object (
MY_SUB_ITEM_NAME )."
However when I use the similar format to find out properties in Transaction. It works fine.
pred = [NSPredicate predicateWithFormat:
#"SELF.%K LIKE %#",
#"identifier",
#"TX001"];
How should I correct my predicate to query property in Item and SubItem
I think that cannot work with -predicateWithFormat: for two aggregation levels. On each level you can have a ANY or an ALL aggregation. So the "right" syntax would be ANY items ANY subitems.… = …. Or ANY items ALL subitems.…= …" or …
You can try to build the predicate manually with NSExpression, probably using subqueries.
Oh, you are not using Core Data, what I assumed. So simply do it manually in a loop or use a computed property.
I am using the DynamoDB SDK v2 . I can scan the database however I am struggling to query it for a specific results. I don't know if I have the DB setup wrong or I am doing the query wrong.
When I use
- (void)getTableRow:(NSString *)rangeKey {
AWSDynamoDBObjectMapper *dynamoDBObjectMapper = [AWSDynamoDBObjectMapper defaultDynamoDBObjectMapper];
[[dynamoDBObjectMapper load:[SonicUserTableRow class]
hashKey:#"UserId"
rangeKey:rangeKey] continueWithExecutor:[BFExecutor mainThreadExecutor] withBlock:^id(BFTask *task) {
if (!task.error) {
SonicUserTableRow *tableRow = task.result;
NSLog (#"Table Row %#", tableRow);
} else {
//Catch Error
}
return nil;
}];
}
I am calling it using [self getTableRow:#" ENTER UNIQUE USER ID "];
However I am getting the error
The provided key element does not match the schema
How can I fix this?
Note I am using the new Amazon SDK v2.
My Database
HASH & RANGE KEYS
SonicUserTableRow .m
+ (NSString *)dynamoDBTableName {
return #"SonicUsers";
}
+ (NSString *)hashKeyAttribute {
return #"UserId";
}
+ (NSString *)rangeKeyAttribute {
return #"Username";
}
SonicUserTableRow .h
#interface SonicUserTableRow : AWSDynamoDBModel <AWSDynamoDBModeling>
#property (nonatomic, strong) NSString *UserId;
#property (nonatomic, strong) NSString *Username;
#property (nonatomic, strong) NSString *profileImage;
#property (nonatomic, strong) NSString *active;
#property (nonatomic, strong) NSString *email;
#property (nonatomic, strong) NSString *flags;
#property (nonatomic, strong) NSString *attuned;
I have UserId value UserIdString: us-east-1:4ae0a93a-59a6-45fd-80c8-ff6b99f1d152 in the database so am trying to call for example: [self getTableRow:#"us-east-1:4ae0a93a-59a6-45fd-80c8-ff6b99f1d152"];
If DropId is a hash key of your table, you can use - load:hashKey:rangeKey: to load a single item.
I have been struggling with this issue for some time now and I cant figure out why the JSON serialization is not working. What seems to be a simple task it taking way too long.
I have my model classes listed below. User object has NSArray of Education and Employment objects.
I am using RestKit and all of the relationships have been made and I can see that the dictionary of the parameters is being made the data is correct. In order to debug the issue further I am making JSON using the following code.
NSDictionary *parameters = [RKObjectParameterization parametersWithObject:self.user requestDescriptor:delegate.postUserRequestDescriptor error:&error];
// Serialize the object to JSON
BOOL isTurnableToJSON = [NSJSONSerialization
isValidJSONObject: parameters];
if(isTurnableToJSON){
NSData *JSON = [RKMIMETypeSerialization dataFromObject:parameters MIMEType:RKMIMETypeJSON error:&error];
}
isTurnableToJSON is always "NO". When I force creation of JSON I get the following error.
** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (Education)'
The same error is also thrown for employment if I remove the relationship of Education with user.
Here is my user, education, and location models.
#interface User : NSObject
#property (strong, nonatomic) NSString *first_name;
#property (strong, nonatomic) NSString *middle_name;
#property (strong, nonatomic) NSString *last_name;
#property (strong, nonatomic) NSString *profile_picture;
#property (strong, nonatomic) NSString *display_name;
#property (nonatomic, strong) NSArray *education;
#property (nonatomic, strong) NSArray *employment;
#property (nonatomic, strong) NSMutableArray *skills;
#property (strong, nonatomic) NSString *about_you;
#end
#interface Education : NSObject
#property (nonatomic, strong) NSString *name;
#property (nonatomic, strong) NSString *graduation_date;
#property (nonatomic, strong) NSString *major;
#property (nonatomic, strong) NSString *degree;
#property (nonatomic, strong) Location *location;
#property (nonatomic) NSNumber *current;
#end
#interface Location : NSObject
#property (nonatomic, strong) NSString *city;
#property (nonatomic, strong) NSString *state;
#property (nonatomic, strong) NSString *country;
#end
At this point I am at lose of any ideas and any help would be appreciated.
Update: RestKit Relationship mapping.
RKObjectMapping *locationMap = [RKObjectMapping mappingForClass:(Location.class)];
[locationMap addAttributeMappingsFromDictionary:#{#"city":#"city",#"state":#"state",#"country":#"country"}];
RKObjectMapping *educationMap = [RKObjectMapping mappingForClass:(Education.class)];
[educationMap addAttributeMappingsFromDictionary:# { #"name":#"name",#"graduation_date":#"graduation_date",#"major":#"major", #"degree":#"degree",#"current":#"current"}];
[educationMap addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:#"location" toKeyPath:#"location" withMapping:locationMap]];
RKObjectMapping *employmentMap =[RKObjectMapping mappingForClass:(Employment.class)];
[employmentMap addAttributeMappingsFromDictionary:#{#"company":#"company",#"occupation":#"occupation", #"start_date":#"start_date",#"end_date":#"end_date",#"current":#"current"}];
RKObjectMapping *userPutRequestMapping = [RKObjectMapping requestMapping];
[userPutRequestMapping addAttributeMappingsFromDictionary:putUserMap];
[userPutRequestMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:#"education" toKeyPath:#"education" withMapping:[educationMap inverseMapping]]];
[userPutRequestMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:#"employment" toKeyPath:#"employment" withMapping:[employmentMap inverseMapping]]];
USER PUT REQUEST
[objectManager addRequestDescriptor:[RKRequestDescriptor requestDescriptorWithMapping:userPutRequestMapping
objectClass:[User class]
rootKeyPath:nil
method:RKRequestMethodPUT]];