I have a strange problem while trying to upload an image using RestKit. I studied similar issues, but none of them could fix my problem.
In my application, a user can create a comment for some Task.
So, I have a setting RKEntityMappingand RKObjectMappingfor example:
- (RKEntityMapping *)commentsMapping {
RKEntityMapping *commentsMapping = [RKEntityMapping mappingForEntityForName:@"DBComments" inManagedObjectStore:objectManager.managedObjectStore];
commentsMapping.setDefaultValueForMissingAttributes = NO;
commentsMapping.identificationAttributes = @[@"id"];
[commentsMapping setModificationAttributeForName:@"updated_at"];
[commentsMapping addAttributeMappingsFromDictionary:@{
@"body" : @"body",
@"created_at" : @"created_at",
@"id" : @"id",
@"parent_id" : @"parent_id",
@"send_email" : @"send_email",
@"updated_at" : @"updated_at",
@"user.id" : @"user_id",
@"user.name" : @"user_name",
}];
[commentsMapping addRelationshipMappingWithSourceKeyPath:@"attachments" mapping:[self attachmentsMapping]];
return commentsMapping;
}
- (RKObjectMapping *)commentsRequestMapping {
RKObjectMapping *commentsRequestMapping = [RKObjectMapping requestMapping];
[commentsRequestMapping addAttributeMappingsFromDictionary:@{
@"body" : @"body",
@"created_at" : @"created_at",
@"id" : @"id",
@"parent_id" : @"parent_id",
@"send_email" : @"send_email",
@"updated_at" : @"updated_at",
@"user.id" : @"user_id",
@"user.name" : @"user_name",
}];
return commentsRequestMapping;
}
I defined URL_COMMENTS like this:
#define URL_COMMENTS @"/comments"
To get the objects, I call:
[[RKObjectManager sharedManager] getObjectsAtPath:URL_COMMENTS
parameters:@{@"item_id": parentID}
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
KLog(@"success");
}
failure:^(RKObjectRequestOperation *operation, NSError *error) {
KLog(@"fail");
}];
And it works perfectly, without errors.
If I need to create a new comment, I call:
[[RKObjectManager sharedManager] postObject:comment path:URL_COMMENTS
parameters:nil
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
KLog(@"success");
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
KLog(@"fail");
}];
It works fine and without errors.
But when I need to create a comment with an image attachment, I call:
NSMutableURLRequest *request =[[RKObjectManager sharedManager] multipartFormRequestWithObject:comment
method:RKRequestMethodPOST
path:URL_COMMENTS
parameters:nil
constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData:UIImageJPEGRepresentation(image, 0.7)
name:@"photo"
fileName:@"photo.jpg"
mimeType:@"image/jpg"];
}];
RKObjectRequestOperation *operation = [[RKObjectManager sharedManager] objectRequestOperationWithRequest:request
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
KLog(@"%@", [mappingResult firstObject]);
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
KLog(@"fail");
}];
[operation start];
Now here is the problem, the comment created on the server side successfully, but the application terminates with an error:
Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<DBComments 0x11e01400> valueForUndefinedKey:]: the entity (null) is not key value coding-compliant for the key "id".'
Here's another Log
D restkit.object_mapping:RKMapperOperation.m:377 Executing mapping operation for representation: {
body = "Test attachment";
"created_at" = "2014-04-02T15:41:00+02:00";
id = 13379;
"parent_id" = 291160;
"updated_at" = "2014-04-02T15:41:00+02:00";
user = {
id = 12891;
name = "Rehmat Qadir";
};
}
and targetObject: (null)
D restkit.object_mapping:RKMapperOperation.m:300 Found mappable data at keyPath '': {
body = "Test attachment";
"created_at" = "2014-04-02T15:41:00+02:00";
id = 13379;
"parent_id" = 291160;
"updated_at" = "2014-04-02T15:41:00+02:00";
user = {
id = 12891;
name = "Rehmat Qadir";
};
}
CoreData: error: Failed to call designated initializer on NSManagedObject class 'DBComments'
2014-04-02 18:41:00.269 MeetingKing[14722:f03] D restkit.object_mapping:RKMapperOperation.m:231 Asked to map source object {
body = "Test attachment";
"created_at" = "2014-04-02T15:41:00+02:00";
id = 13379;
"parent_id" = 291160;
"updated_at" = "2014-04-02T15:41:00+02:00";
user = {
id = 12891;
name = "Rehmat Qadir";
};
} with mapping <RKEntityMapping:0xc686500 objectClass=DBComments propertyMappings=(
"<RKAttributeMapping: 0xc6877d0 user.id => user_id>",
"<RKAttributeMapping: 0xc6875c0 id => id>",
"<RKAttributeMapping: 0xc6875e0 send_email => send_email>",
"<RKAttributeMapping: 0xc687610 created_at => created_at>",
"<RKAttributeMapping: 0xc687630 parent_id => parent_id>",
"<RKAttributeMapping: 0xc6877e0 updated_at => updated_at>",
"<RKAttributeMapping: 0xc687850 user.name => user_name>",
"<RKAttributeMapping: 0xc687920 body => body>",
"<RKRelationshipMapping: 0xc688b90 attachments => attachments>"
)>
D restkit.object_mapping:RKMappingOperation.m:952 Starting mapping operation...
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<DBComments 0x11e01400> valueForUndefinedKey:]: the entity (null) is not key value coding-compliant for the key "id".'
, URL.
URL_COMMENTS, #define URL_COMMENTS @"/comments"
comments ( /) pathPattern responseDescriptor /comments ( /)
/comments ( /) pathPattern responseDescriptor comments ( /)
[RKResponseDescriptor responseDescriptorWithMapping:[self commentsMapping]
method:RKRequestMethodGET
pathPattern:URL_COMMENTS
keyPath:@"" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)],
/, .
/ , AFNetworking. , .
,