In my MTLModel subclass I have this:
@property (assign, nonatomic) NSInteger catId;
And of course this in the implementation:
+ (NSDictionary *)JSONKeyPathsByPropertyKey {
return @{
@"catId" : @"cat_id"
};
}
But what if my server friends decide to change cat_id to a string in the JSON response? How can I handle this case, and convert it to an int so that I don't get Mantle errors?
We also used Mantle for quite some time, but at the end migrated to handwritten parser/serializers, as the task itself seem to be trivial.
Though, we also have this kind of problems: what if server return something we do not expect (e.g. NSDictionary instead of NSString).
To prevent our app from crashing we use this simple tool: Fuzzer.
Basically the tool provides a method that takes a sample and a block. The block evaluates several times, each time bringing slightly mutated version of the sample. You can check behaviour of the models/parsers/serializers using the mutants, to ensure that your code handles unexpected data gracefully.
Here is example taken from project's README:
- (void)test {
NSDictionary *sample = @{
@“name” : @“John Doe”,
@“age” : @42
};
UserDeserializer *deserializer = [UserDeserializer new];
FZRRunner *runner = [FZRRunner runnerWithBuiltinMutationsForSample:sample];
NSArray *reports = [runner enumerateMutantsUsingBlock:^(NSDictionary *mutant) {
[deserializer deserializeUser:mutant];
}];
XCTAssertEqual(reports.count, 0);
}
if([obj isKindOfClass:NSClassFromString(@"__NSCFNumber")])
{
//if it is int or number
}
else
{
}
May be above method will help you
