核心数据:商店无法容纳实体实例(Cocoa错误:134020)

Question

这是最奇怪的错误.互联网表明这是针对Tiger的问题; 除了我实际上是针对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)}

我在收到此错误之前向Core Data添加了大量数据,但是我保存了两次(一次在中间,然后在最后再次).第一次保存后一切都很好,这是导致问题的第二个保存,所以我将发布我在第一次之后但在第二次之前使用的代码.

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;
        }
}

我可以在这里找到我在NSManagedObject子类上调用的便捷方法.

我在应用程序的其他地方(运行很久之后)可以添加/编辑/删除上面引用的所有实体.每次都不会在同一实体上发生错误.

任何帮助将不胜感激!这是一个棘手的问题.

Answer 1

对于通过Google找到此页面的其他人:我遇到了与上述解决方案无关的原因的类似问题.

触发错误的代码是为现有商店中使用相同托管对象模型的商店播种.

错误的代码是

NSManagedObject *newObj = [[NSManagedObject alloc] initWithEntity:[obj entity] insertIntoManagedObjectContext:moc]

相反

NSManagedObject *newObj = [[NSManagedObject alloc] initWithEntity:[NSEntityDescription entityForName:obj.entity.name inManagedObjectContext:moc] insertIntoManagedObjectContext:moc]

这似乎是多余的,但为我摆脱了错误.

Answer 2

我在以下情况下遇到此错误:

• 我在我的CoreData模型中使用配置.每个实体都分配给某个配置.
• 我添加了一个新实体,忘了将其分配给其中一个配置.
• 这似乎导致Cocoa错误:134020.

将新实体添加到配置后,一切正常

Answer 3

好吧，我发现了问题所在。

在我发布之前的代码中，我使用 RestKit 的 Seeder 对象从本地 json 文件为我的数据库播种，然后在运行后继续添加对象。但在您调用 之前，它实际上不会将对象提交到对象存储中finalizeSeedingAndExit。

调用该函数来播种数据的第一部分，然后注释掉播种器并再次运行，修复了这个奇怪的错误。