RestKit 0.20-pre3 with RKXMLReaderSerialization and XMLReader - ios

Question

I'm trying to use RestKit 0.20-pre3 together with RKXMLReaderSerialization and XMLReader in order to map a XML response from a WebService like this:
<ArrayOfAddressBookItem xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://tempuri.org/">
<AddressBookItem>
<CommonName>xxxxxxxxxx</CommonName>
<OU>xxxxxx</OU>
<Name>xxxxxx</Name>
<LastName>xxxxxxxxxx</LastName>
<Service>xxxxxxxxxx</Service>
<Email>xxxxxxxxxxxx</Email>
<InternalPhoneNumber>xxxxxxxxxxx</InternalPhoneNumber>
<ExternalPhoneNumber>xxxxxxxxxxx</ExternalPhoneNumber>
<Mobile>xxxxxxxxxxx</Mobile>
<Street>xxxxxxxxxxx</Street>
<PostalCode>xxxxxxxxxxx</PostalCode>
<City>xxxxxxx</City>
<County>xxxxxxxxx</County>
<SupervisorCommonName>
xxxxxxxxxxxxx
</SupervisorCommonName>
<SupervisorLastName>xxxxxxxxxx</SupervisorLastName>
</AddressBookItem>
<AddressBookItem>
<CommonName>yyyyyyyyyyyy</CommonName>
<OU>
yyyyyyyyyyyyy
</OU>
<Name>yyyyyyyyy</Name>
<LastName>yyyyyyyy</LastName>
<Service>yyyyyyyyyy</Service>
<Email>yyyyyyyyyy</Email>
<InternalPhoneNumber>yyyyyyyyy</InternalPhoneNumber>
<ExternalPhoneNumber>yyyyyyyy</ExternalPhoneNumber>
<Street>yyyyyyyyyyy</Street>
<PostalCode>yyyyyy</PostalCode>
<City>yyyyyy</City>
<County>yyyyyyyy</County>
<SupervisorCommonName>
yyyyyyyyyyy
</SupervisorCommonName>
<SupervisorLastName>yyyyyy</SupervisorLastName>
</AddressBookItem>
<AddressBookItem>
....
</AddressBookItem>
<AddressBookItem>
</ArrayOfAddressBookItem>
In the App Delegation code:
[RKMIMETypeSerialization registerClass:[RKXMLReaderSerialization class] forMIMEType:#"application/xml"];
AFHTTPClient *httpClient = [AFHTTPClient clientWithBaseURL:[NSURL URLWithString:#"http://thehostaddress/mywebserviceurl/"]];
httpClient.parameterEncoding = AFFormURLParameterEncoding;
RKObjectManager *objManager = [[RKObjectManager alloc] initWithHTTPClient:httpClient];
[objManager setAcceptHeaderWithMIMEType:RKMIMETypeTextXML];
objManager.requestSerializationMIMEType = RKMIMETypeTextXML;
RKObjectMapping *personMapping = [RKObjectMapping mappingForClass:[PersonItem class]];
[personMapping addAttributeMappingsFromDictionary:#{#"CommonName" : #"commonName", #"OU" : #"ou", #"Name" : #"name", #"LastName" : #"lastName", #"Service" : #"service", #"Email" : #"eMail", #"InternalPhoneNumber" : #"internalPhoneNumber", #"ExternalPhoneNumber" : #"externalPhoneNumber", #"Mobile" : #"mobilePhoneNumber", #"Street" : #"street", #"PostalCode" : #"postalCode", #"City" : #"city", #"County" : #"county", #"SupervisorCommonName" : #"supervisorCommonName", #"SupervisorLastName" : #"supervisorLastName"}];
RKResponseDescriptor *peopleResponse = [RKResponseDescriptor responseDescriptorWithMapping:personMapping pathPattern:#"/mywebserviceurl/" keyPath:#"ArrayOfAddressBookItem" statusCodes:[NSIndexSet indexSetWithIndex:200]];
[objManager addResponseDescriptor:peopleResponse];
later, when I want to get the objects:
[objManager getObjectsAtPath:#"/mywebserviceurl/" parameters:nil
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
NSLog(#"SUCCESS: %#", mappingResult);
_items = [[mappingResult array] mutableCopy];
}
failure:^(RKObjectRequestOperation *operation, NSError *error) {
NSLog(#"ERROR: %#", error);
}];
I can see that the mapper gets the correct number of the Array elements, but for each field of the object, I cannot retrieve the values:
2012-12-10 19:02:53.370 GenPeople2[14240:1703] T restkit.object_mapping:RKMappingOperation.m:341 Mapping attribute value keyPath 'CommonName' to 'commonName'
2012-12-10 19:02:53.370 GenPeople2[14240:1703] T restkit.object_mapping:RKMappingOperation.m:228 Found transformable value at keyPath 'CommonName'. Transforming from type '__NSDictionaryM' to 'NSString'
2012-12-10 19:02:53.371 GenPeople2[14240:1703] T restkit.object_mapping:RKMappingOperation.m:360 Skipped mapping of attribute value from keyPath 'CommonName to keyPath 'commonName' -- value is unchanged ((null))
and the result in my objects are null values.
I saw that the XML parser gives me back this:
2012-12-10 19:02:53.371 GenPeople2[14240:1703] D restkit.object_mapping:RKMapperOperation.m:218 Asked to map source
object {
City = {
text = thecity;
};
CommonName = {
text = thename;
};
County = {
text = thecounty;
};
and so on....
How to map correctly the values in order to permit RestKit to retrieve the values in the NSDictionary for each field ?

Answer 1

Thank Richard for your feedback, but it didn't work as I would like.
Really simpler: using nested keypaths in source object to map, worked as a charm:
RKObjectMapping *abItemMapping = [RKObjectMapping mappingForClass:[AddressBookItem class]];
[abItemMapping addAttributeMappingsFromDictionary:#{#"CommonName.text" : #"commonName", #"OU.text" : #"ou", #"Name.text" : #"name", #"LastName.text" : #"lastName", #"Service.text" : #"service", #"Email.text" : #"email"}];

Answer 2

I map the child nodes of an element as their own objects. So OU for example would be represented by a mapping and relationship of it's own:
RKObjectMapping *baseValueMapping = [RKObjectMapping mappingForClass:[CHRValue class]];
[baseValueMapping addAttributeMappingsFromDictionary:#{#"text" : #"value"}];
RKRelationshipMapping *ouRelation = [RKRelationshipMapping relationshipMappingFromKeyPath:#"OU" toKeyPath:#"ou" withMapping:baseValueMapping];
RKRelationshipMapping *nameRelation = [RKRelationshipMapping relationshipMappingFromKeyPath:#"Name" toKeyPath:#"name" withMapping:baseValueMapping];
[addressBookMapping addPropertyMapping:ouRelation];
[addressBookMapping addPropertyMapping:nameRelation];
Where CHRValue has a property named "value" which is an NSString. Note you need to use "text" to refer to the value of a node.