OCMapper2.1 seems not working in Xcode 5?

[seaguest]

Hello,

I am using OCMapper in my Xcode 5 project which is under OS X 10.8.5.

I am trying the sample test as following, but the user_id is null, the object didn't get mapped I don't know why?

Here is my Model:

#import <Foundation/Foundation.h>

@interface User : NSObject

@property (nonatomic) int user_id;

@property (nonatomic) NSString* registration;

@end

Here is my Test

#import <XCTest/XCTest.h>
#import "ObjectMapper.h"
#import "InCodeMappingProvider.h"
#import "ObjectInstanceProvider.h"
#import "CommonLoggingProvider.h"
#import "User.h"

@interface TestJson : XCTestCase

@property (nonatomic, strong) ObjectMapper *mapper;
@property (nonatomic, strong) InCodeMappingProvider *mappingProvider;

@end

@implementation TestJson
@synthesize mapper;
@synthesize mappingProvider;

- (void)setUp
{
    [super setUp];

    self.mappingProvider = [[InCodeMappingProvider alloc] init];
    self.mapper = [[ObjectMapper alloc] init];
    self.mapper.mappingProvider = self.mappingProvider;
}

- (void)tearDown
{
    self.mapper = nil;
    self.mappingProvider =  nil;
    [super tearDown];
}

- (void)test1
{

    NSMutableDictionary *dic = [[NSMutableDictionary alloc]init];
    [dic setObject:[NSNumber numberWithInt:10] forKey:@"user_id"];
    [dic setObject:@"Value2" forKey:@"registration"];

    User *user = [self.mapper objectFromSource:dic toInstanceOfClass:[User class]];
    NSLog(@" user.user_id - %@", user.user_id);    // here the user.user_id is null
}

@end

So I have 3 questins: 1, is Xcode 5 + OS X 10.8 supported by the latest OCMapper 2.1 version?

2, I tried to use like this (I saw on StackOverflow) User *user = [User objectFromDictionary:dic]; but this needs to add #import "NSObject+ObjectMapper.h"

Is this the right way to use OCMapper, why we need a mapper and mappingProvider?

3, in case the Model has more properties than the dictionary, for exampel, we have only user_id in the dictionary while User has user_id + registration, does OCMapper support the optional mapping?

[aryaxt]

First of all your model has a property of type int, that's not supported, you should use NSNumber for numeric values and booleans similar to CoreData

1- Yes 2- There are 2 ways to use it, either through the NSObject category or using the methods in ObjectMapper class which is a singleton

[[ObjectMapper sharedInstance] objectFromSource:dict toInstanceOfClass:User.class];

3- OCMapper goes through the dictionary keys, and if it finds a matching property then it maps it, otherwise it'll ignore it. So yes it does support optional mapping

[seaguest]

@aryaxt , thanks for your reply. I tried with NSNumber, but it still doesn't work, did I miss something? Or is this due to the version of Xcode or OCMapper?

@interface User : NSObject
@property (nonatomic) NSNumber* user_id;
@property (nonatomic) NSString* registration;
- (NSString *)description;
@end

@implementation User
- (NSString *)description {
    return [NSString stringWithFormat: @"User: user_id=%@ registration=%@", self.user_id, self.registration];
}
@end

- (void)test1
{

    NSMutableDictionary *dic = [[NSMutableDictionary alloc]init];
    [dic setObject:[NSNumber numberWithInt:10] forKey:@"user_id"];
    //[dic setObject:@"11" forKey:@"user_id"];
    [dic setObject:@"my test registration" forKey:@"registration"];

    //User *user = [self.mapper objectFromSource:dic toInstanceOfClass:[User class]];

    User *user = [User objectFromDictionary:dic];

    NSLog(@" dictionary is - %@", dic);
    NSLog(@" ******* user is - %@", user);
}

Now I get:

2016-04-02 10:33:30.504 test[1660:90b]  dictionary is - {
    registration = "my test registration";
    "user_id" = 10;
}
2016-04-02 10:33:30.505 test[1660:90b]  ******* user is - User: user_id=(null) registration=my test registration

[aryaxt]

Your dictionary has a string for user_id, but your property is an NSNumber { "user_id" : 12 } This would map correctly.

But in your case you have a string as dictionary, so you either need to change that or change the property to be a string

[seaguest]

@aryaxt sorry, I used [dic setObject:[NSNumber numberWithInt:10] forKey:@"user_id"];

user_id should be a NSNumber , no? The result for this is

2016-04-02 10:45:39.464 test[1777:90b]  dictionary is - {
    registration = "my test registration";
    "user_id" = 10;
}
2016-04-02 10:45:39.494 test[1777:90b]  ******* user is - User: user_id=(null) registration=my test registration

If I just add user_id with NSNumber, then I get

2016-04-02 10:52:16.201 test[1825:90b]  dictionary is - {
    "user_id" = 10;
}
2016-04-02 10:52:16.212 test[1825:90b]  ******* user is - User: user_id=(null) registration=(null)

I just tried to add String, and tried the second usage of OCmapper as well, the user_id is always null.

[seaguest]

@aryaxt Through debugging, it said WLog(@"Unable to map from key(%@) to property(%@) for class (%@)", key, propertyName, NSStringFromClass(class));

It seems the OCMapper can;t find properly the property name for user_id in User Model.