这是最奇怪的错误。互联网表明这是针对老虎的问题;除了我实际上针对的是 iOS 3 和 4。
Error Domain=NSCocoaErrorDomain Code=134020 "The operation couldn\u2019t be completed. (Cocoa error 134020.)" UserInfo=0xc502350 {NSAffectedObjectsErrorKey=<PartRecommendation: 0x6a113e0> (entity: PartRecommendation; id: 0x6a0d0e0 <x-coredata:///PartRecommendation/tAE2B5BA2-44FD-4B62-95D7-5B86EBD6830014> ; data: {
"_rkManagedObjectSyncStatus" = 0;
name = "Thin canopy cover";
part = nil;
partRecommendationId = 6;
partType = "0x6a07f40 <x-coredata:///PartType/tAE2B5BA2-44FD-4B62-95D7-5B86EBD683003>";
}), NSUnderlyingException=Store <NSSQLCore: 0x5f3b4c0> cannot hold instances of entity (<NSEntityDescription: 0x6d2e5d0>) name PartRecommendation, managedObjectClassName PartRecommendation, renamingIdentifier PartRecommendation, isAbstract 0, superentity name PartOption, properties {
"_rkManagedObjectSyncStatus" = "(<NSAttributeDescription: 0x6d37550>), name _rkManagedObjectSyncStatus, isOptional 0, isTransient 0, entity PartRecommendation, renamingIdentifier _rkManagedObjectSyncStatus, validation predicates (\n), warnings (\n), versionHashModifier (null), attributeType 100 , attributeValueClassName NSNumber, defaultValue 0";
name = "(<NSAttributeDescription: 0x6d37c10>), name name, isOptional 1, isTransient 0, entity PartRecommendation, renamingIdentifier name, validation predicates (\n), warnings (\n), versionHashModifier (null), attributeType 700 , attributeValueClassName NSString, defaultValue (null)";
part = "(<NSRelationshipDescription: 0x6d2e660>), name part, isOptional 1, isTransient 0, entity PartRecommendation, renamingIdentifier part, validation predicates (\n), warnings (\n), versionHashModifier (null), destination entity Part, inverseRelationship recommendation, minCount 1, maxCount 1";
partRecommendationId = "(<NSAttributeDescription: 0x6d2e6d0>), name partRecommendationId, isOptional 1, isTransient 0, entity PartRecommendation, renamingIdentifier partRecommendationId, validation predicates (\n), warnings (\n), versionHashModifier (null), attributeType 100 , attributeValueClassName NSNumber, defaultValue 0";
partType = "(<NSRelationshipDescription: 0x6d2e720>), name partType, isOptional 1, isTransient 0, entity PartRecommendation, renamingIdentifier partType, validation predicates (\n), warnings (\n), versionHashModifier (null), destination entity PartType, inverseRelationship partRecommendations, minCount 1, maxCount 1";
}, subentities {
}, userInfo {
}, versionHashModifier (null)}
在出现此错误之前,我正在向 Core Data 添加大量数据,但我保存了两次(一次在中间,然后在最后一次)。第一次保存后一切都很好,这是导致问题的第二次保存,所以我将在第一次保存之后但在第二次保存之前发布我正在使用的代码。
Landscape *landscape = [Landscape object];
Type *type = [Type object];
type.name = @"tree";
MeasurementType *caliperType = [MeasurementType object];
MeasurementType *heightType = [MeasurementType object];
InventoryTree *inventoryTree = [InventoryTree object];
inventoryTree.landscape = landscape;
inventoryTree.type = type;
Assessment *assessmentTree = [Assessment object];
assessmentTree.inventoryItem = inventoryTree;
assessmentTree.type = type;
[[inventoryTree mutableSetValueForKeyPath:@"assessments"] addObject:assessmentTree];
Measurement *caliper = [Measurement object];
Measurement *height = [Measurement object];
caliper.type = caliperType;
height.type = heightType;
[[assessmentTree mutableSetValueForKey:@"measurements"] addObjectsFromArray:[NSArray arrayWithObjects:caliper, height, nil]];
for (PartType *pType in [PartType allObjects]) {
pType.type = type;
Part *treePart = [Part object];
treePart.partType = pType;
[[assessmentTree mutableSetValueForKey:@"parts"] addObject:treePart];
for (PartCondition *cond in pType.partConditions) {
cond.partType = pType;
}
for (PartRecommendation *rec in pType.partRecommendations) {
rec.partType = pType;
}
}
我在 NSManagedObject 子类上调用的便捷方法可以在这里找到。
我在应用程序的其他地方(运行很久之后)有可以添加/编辑/删除上面引用的所有实体的方法。错误不会每次都发生在同一个实体上。
任何帮助将不胜感激!这是一个棘手的问题。