Question

I have been trying to post using RestKit after I have successfully used it for object mapping and keep getting the error “Could not find an object mapping for keyPath: ””.

I have already had success using only JSON of iOS with the following code:

responseData = [NSMutableData data];

NSURL *url = [NSURL URLWithString:@"http://lalubema.cloudapp.net:9000/Data.soap/Pessoa"];

NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
[params setObject:@"Objective-c test from send Request #1" forKey:@"Nome"];
[params setObject:@"/Date(1200355200000)/" forKey:@"DataNascimento"];   
[params setObject:@"M" forKey:@"Sexo"];
[params setObject:@"(31)2321-2383" forKey:@"Telefone"];

NSError *jsonError;
NSData *requestdata = [NSJSONSerialization dataWithJSONObject:params options:0 error:&jsonError];

NSMutableURLRequest *request;
request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:[NSString stringWithFormat:@"%d", [requestdata length]] forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:requestdata];

//this kicks off the request asynchronously
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

The code I am trying with RestKit and getting the error is the following:

[RKObjectManager sharedManager].serializationMIMEType = RKMIMETypeJSON;
[RKObjectManager sharedManager].acceptMIMEType = RKMIMETypeJSON;

RKObjectMapping* pessoaMapping = [RKObjectMapping mappingForClass:[Pessoa class]];
pessoaMapping.setDefaultValueForMissingAttributes = YES;
[pessoaMapping mapKeyPath:@"DataNascimento" toAttribute:@"dataNascimento"];
[pessoaMapping mapKeyPath:@"Nome" toAttribute:@"nome"];
[pessoaMapping mapKeyPath:@"Sexo" toAttribute:@"sexo"];
[pessoaMapping mapKeyPath:@"Telefone" toAttribute:@"telefone"];
[[RKObjectManager sharedManager].mappingProvider addObjectMapping:pessoaMapping]; 

RKObjectMapping* pessoaSerializationMapping = [RKObjectMapping mappingForClass:[NSMutableDictionary class]];
[pessoaSerializationMapping mapAttributes:@"dataNascimento", @"docIdentidade", @"email", @"foto", @"pid", @"nome", @"senha", @"sexo", @"telefone", nil];    
[[RKObjectManager sharedManager].mappingProvider setSerializationMapping:pessoaSerializationMapping forClass:[Pessoa class]];

RKObjectRouter *router = [[RKObjectManager sharedManager] router];

[router routeClass:[Pessoa class] toResourcePath:@"/Pessoa/:id"];
[router routeClass:[Pessoa class] toResourcePath:@"/Pessoa" forMethod:RKRequestMethodPOST];

Pessoa *Novo = [[Pessoa alloc] init];

Novo.nome = @"Objective-c test from send postPessoa #1";
Novo.telefone = @"(31)1234-5678";
Novo.sexo = @"M";

NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:@"dd-MM-yyyy"];    

RKDotNetDateFormatter *dotNetFormattedDate = [[RKDotNetDateFormatter alloc] init];
NSString *data = [dotNetFormattedDate stringFromDate:[df dateFromString: @"10-10-1979"]];

Novo.dataNascimento = data;

// POST to /Pessoa
[[RKObjectManager sharedManager] postObject:Novo delegate:self];

The RKLog error is:

2012-06-27 17:58:28.539 MyTestApp[6101:fb03] I restkit:RKLog.m:33 RestKit initialized…

2012-06-27 17:58:28.589 MyTestApp[6101:fb03] I restkit.network.reachability:RKReachabilityObserver.m:369 Network availability has been determined for reachability observer

2012-06-27 17:58:41.260 MyTestApp[6101:fb03] W restkit.object_mapping:RKObjectMapper.m:81 Adding mapping error: Could not find an object mapping for keyPath: ”

2012-06-27 17:58:41.261 MyTestApp[6101:fb03] E restkit.network:RKObjectLoader.m:222 Encountered errors during mapping: Could not find an object mapping for keyPath: ”

2012-06-27 17:58:41.261 MyTestApp[6101:fb03] E restkit.network:RKObjectLoader.m:345 Encountered an error while attempting to map server side errors from payload: Could not find an object mapping for keyPath: ”

2012-06-27 17:58:41.262 MyTestApp[6101:fb03] Erro encontrado: Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 “Could not find an object mapping for keyPath: ”” UserInfo=0x808fac0 {=RKObjectMapperKeyPath, NSLocalizedDescription=Could not find an object mapping for keyPath: ”}

Answer 1

I think the main problem is represented by this code block:

RKObjectMapping* pessoaMapping = [RKObjectMapping mappingForClass:[Pessoa class]];
pessoaMapping.setDefaultValueForMissingAttributes = YES;
[pessoaMapping mapKeyPath:@"DataNascimento" toAttribute:@"dataNascimento"];
[pessoaMapping mapKeyPath:@"Nome" toAttribute:@"nome"];
[pessoaMapping mapKeyPath:@"Sexo" toAttribute:@"sexo"];
[pessoaMapping mapKeyPath:@"Telefone" toAttribute:@"telefone"];
[[RKObjectManager sharedManager].mappingProvider addObjectMapping:pessoaMapping]; 

RKObjectMapping* pessoaSerializationMapping = [RKObjectMapping mappingForClass:[NSMutableDictionary class]];
[pessoaSerializationMapping mapAttributes:@"dataNascimento", @"docIdentidade", @"email", @"foto", @"pid", @"nome", @"senha", @"sexo", @"telefone", nil];    
[[RKObjectManager sharedManager].mappingProvider setSerializationMapping:pessoaSerializationMapping forClass:[Pessoa class]];

that you should try replacing with:

RKObjectMapping* pessoaMapping = [RKObjectMapping mappingForClass:[Pessoa class]];
pessoaMapping.setDefaultValueForMissingAttributes = YES;
[pessoaMapping mapKeyPath:@"DataNascimento" toAttribute:@"dataNascimento"];
[pessoaMapping mapKeyPath:@"Nome" toAttribute:@"nome"];
[pessoaMapping mapKeyPath:@"Sexo" toAttribute:@"sexo"];
[pessoaMapping mapKeyPath:@"Telefone" toAttribute:@"telefone"];
// up until this point, the code is the same, changes below
// -------------------------------------------------------------------------------
// map rest of the attributes, considering key paths match attribute names exactly
[pessoaMapping mapAttributes:@"docIdentidade", @"email", @"foto", @"pid", @"senha", nil];
// set the serialization mapping
[[RKObjectManager sharedManager].mappingProvider setSerializationMapping:[pessoaMapping inverseMapping] forClass:[Pessoa class]];

Also, another problem is at the following line:

[router routeClass:[Pessoa class] toResourcePath:@"/Pessoa/:id"];

The identifier attribute in your Pessoa class seems to be named pid, as seen in the mapAttributes: call. When setting the resource path to the router, I presume RestKit does not know what to replace the value of :id with, using KVC.