核心数据关系在删除后会导致保存错误 [英] Core Data Relationships cause save error after delete
问题描述
这个问题可能是一个长镜头。我无法弄清我在我删除实体后保存时在核心数据项目上出现的错误。我的.xcdatamodel可以在以下位置看到：
This question is probably a long shot. I can't figure out the errors I'm getting on my core data project when I save after I delete an entity. My .xcdatamodel can be seen at:
我有两个主要实体，一个Outfit和一篇文章。我可以创建它们没有问题，但当我删除他们我得到以下错误日志：
I have two main entities that I work with, an Outfit and an Article. I can create them with no problem but when I delete them I get the follow error log:
为装备：
2009-09-22 20:17:37.771 itryiton[29027:20b] Operation could not be completed. (Cocoa error 1600.)
2009-09-22 20:17:37.773 itryiton[29027:20b] {
NSLocalizedDescription = "Operation could not be completed. (Cocoa error 1600.)";
NSValidationErrorKey = outfitArticleViewProperties;
NSValidationErrorObject = <Article: 0x12aa3c0> (entity: Article; id: 0x12b49a0 <x-coredata://7046DA47-FCE1-4E21-8D7B-E532AAC0CC46/Article/p1> ; data: {
articleID = 2009-09-22 19:05:19 -0400;
articleImage = 0x12b4de0 <x-coredata://7046DA47-FCE1-4E21-8D7B-E532AAC0CC46/ArticleImage/p1>;
articleType = nil;
attributeTitles = "(...not nil..)";
color = nil;
comment = nil;
dateCreated = 2009-09-22 19:05:19 -0400;
designer = nil;
imageView = "(...not nil..)";
location = "(...not nil..)";
outfitArticleViewProperties = (
0x12b50f0 <x-coredata://7046DA47-FCE1-4E21-8D7B-E532AAC0CC46/OutfitArticleViewProperties/p1>
);
ownesOrWants = 0;
pattern = nil;
price = nil;
retailer = nil;
thumbnail = "(...not nil..)";
washRequirements = nil;
wearableSeasons = nil;
});
NSValidationErrorValue = {(
<OutfitArticleViewProperties: 0x1215340> (entity: OutfitArticleViewProperties; id: 0x12b50f0 <x-coredata://7046DA47-FCE1-4E21-8D7B-E532AAC0CC46/OutfitArticleViewProperties/p1> ; data: {
article = 0x12b49a0 <x-coredata://7046DA47-FCE1-4E21-8D7B-E532AAC0CC46/Article/p1>;
articleViewPropertiesID = nil;
outfit = nil;
touch = nil;
view = "(...not nil..)";
})
)};
}
如果我删除了一篇文章，我得到：
And if I delete an Article I get:
2009-09-22 18:58:38.591 itryiton[28655:20b] Operation could not be completed. (Cocoa error 1560.)
2009-09-22 18:58:38.593 itryiton[28655:20b] DetailedError: {
NSLocalizedDescription = "Operation could not be completed. (Cocoa error 1600.)";
NSValidationErrorKey = articleImage;
NSValidationErrorObject = <Article: 0x12aa340> (entity: Article; id: 0x12b3f10 <x-coredata://05340FA6-B5DC-4646-A5B4-745C828C73C3/Article/p1> ; data: {
articleID = 2009-09-22 18:58:26 -0400;
articleImage = 0x12b4d00 <x-coredata://05340FA6-B5DC-4646-A5B4-745C828C73C3/ArticleImage/p1>;
articleType = nil;
attributeTitles = "(...not nil..)";
color = nil;
comment = nil;
dateCreated = 2009-09-22 18:58:26 -0400;
designer = nil;
imageView = "(...not nil..)";
location = "(...not nil..)";
outfitArticleViewProperties = (
0x12b5010 <x-coredata://05340FA6-B5DC-4646-A5B4-745C828C73C3/OutfitArticleViewProperties/p1>
);
ownesOrWants = 0;
pattern = nil;
price = nil;
retailer = nil;
thumbnail = "(...not nil..)";
washRequirements = nil;
wearableSeasons = nil;
});
NSValidationErrorValue = <ArticleImage: 0x12ad600> (entity: ArticleImage; id: 0x12b4d00 <x-coredata://05340FA6-B5DC-4646-A5B4-745C828C73C3/ArticleImage/p1> ; data: {
article = 0x12b3f10 <x-coredata://05340FA6-B5DC-4646-A5B4-745C828C73C3/Article/p1>;
image = "(...not nil..)";
});
}
A 1600错误是：
A 1600 error is:
NSValidationRelationshipDeniedDeleteError
表示某些关系的错误代码
与删除规则NSDeleteRuleDeny是
非空。
NSValidationRelationshipDeniedDeleteError Error code to denote some relationship with delete rule NSDeleteRuleDeny is non-empty.
可在Mac OS X v10.4及更高版本中使用。
Available in Mac OS X v10.4 and later.
在CoreDataErrors.h中声明。
Declared in CoreDataErrors.h.
但我不能看到我的生活，哪种关系会阻止删除。如果一些核心数据向导可以看到我的方式的错误，我会感到谦卑。但真的，谢谢！
But I can't see for the life of me which relationship would be preventing the delete. If some Core Data wizard can see the error of my ways, I would be humbled. But seriously, thank you!
我的模型图片：
Picture of my model:
FINAL UPDATE：我无法标记这个问题，因为我没有真正解决它，工作周转。在每个我的managedObjects的.m中，我添加了一个如下的方法：
FINAL UPDATE: I can't mark this solved, because I didn't really solve it, but I do have a working work-around. In the .m for each of my managedObjects I added a method that looks like:
-(void) deleteFromManangedObjectContext{
self.outfit = nil;
self.article = nil;
[[self managedObjectContext] deleteObject:self];
}
所以你可以看到，首先我手动删除关系，有对象删除本身。在其他对象中，而不是nil，我的delete方法被调用一些对象关系，以获得级联。
So you can see, first I manually nil out the relationships, and then I have the object delete itself. In other objects, instead of nil-ing, my delete method is called on some of the objects relationships, to get a cascade.
我仍然对正确的答案感兴趣。但这是我最好的解决方案，它允许对我的关系如何删除的一些细粒度的控制。
I'm still interested in the "right" answer. But this is the best solution I have, and it does allow for some fine-grained control over how my relationships are deleted.
推荐答案
我不能标记这个解决，因为我没有真正解决它，但我有一个工作的工作。在每个我的managedObjects的.m中，我添加了一个如下的方法：
I can't mark this solved, because I didn't really solve it, but I do have a working work-around. In the .m for each of my managedObjects I added a method that looks like:
-(void) deleteFromManangedObjectContext{
self.outfit = nil;
self.article = nil;
[[self managedObjectContext] deleteObject:self];
}
所以你可以看到，首先我手动删除关系，有对象删除本身。在其他对象中，而不是nil，我的delete方法被调用一些对象关系，以获得级联。
So you can see, first I manually nil out the relationships, and then I have the object delete itself. In other objects, instead of nil-ing, my delete method is called on some of the objects relationships, to get a cascade.
我仍然对正确的答案感兴趣。但这是我最好的解决方案，它允许对我的关系如何删除的一些细粒度的控制。
I'm still interested in the "right" answer. But this is the best solution I have, and it does allow for some fine-grained control over how my relationships are deleted.
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