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Improve the error messages for failure to match any key paths in the mapper

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Blake Watters
2012-12-20 22:16:42 -05:00
parent e748238a5b
commit 0cc9ce671e
3 changed files with 50 additions and 9 deletions
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21
Code/ObjectMapping/RKMapperOperation.m
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@@ -37,6 +37,18 @@ static NSString *RKDelegateKeyPathFromKeyPath(NSString *keyPath)
return ([keyPath isEqual:[NSNull null]]) ? nil : keyPath;
}
static NSString *RKFailureReasonErrorStringForMappingNotFoundError(id representation, NSDictionary *mappingsDictionary)
{
NSMutableString *failureReason = [NSMutableString string];
[failureReason appendFormat:@"The mapping operation was unable to find any nested object representations at the key paths searched: %@", [[mappingsDictionary allKeys] componentsJoinedByString:@", "]];
if ([representation respondsToSelector:@selector(allKeys)]) {
[failureReason appendFormat:@"\nThe representation inputted to the mapper was found to contain nested object representations at the following key paths: %@", [[representation allKeys] componentsJoinedByString:@", "]];
}
[failureReason appendFormat:@"\nThis likely indicates that you have misconfigured the key paths for your mappings."];
return failureReason;
}
@interface RKMapperOperation ()
@property (nonatomic, strong, readwrite) NSError *error;
@@ -365,11 +377,10 @@ static NSString *RKDelegateKeyPathFromKeyPath(NSString *keyPath)
// If the content is empty, we don't consider it an error
BOOL isEmpty = [self.representation respondsToSelector:@selector(count)] && ([self.representation count] == 0);
if (foundMappable == NO && !isEmpty) {
NSMutableDictionary *userInfo = [NSMutableDictionary dictionaryWithObjectsAndKeys:
NSLocalizedString(@"Unable to find any mappings for the given content", nil), NSLocalizedDescriptionKey,
[NSNull null], RKMappingErrorKeyPathErrorKey,
self.errors, RKDetailedErrorsKey,
nil];
NSMutableDictionary *userInfo = [@{ NSLocalizedDescriptionKey: NSLocalizedString(@"No mappable object representations were found at the key paths searched.", nil),
NSLocalizedFailureReasonErrorKey: RKFailureReasonErrorStringForMappingNotFoundError(self.representation, self.mappingsDictionary),
RKMappingErrorKeyPathErrorKey: [NSNull null],
RKDetailedErrorsKey: self.errors} mutableCopy];
NSError *compositeError = [[NSError alloc] initWithDomain:RKErrorDomain code:RKMappingErrorNotFound userInfo:userInfo];
self.error = compositeError;
return;