我正在尝试更新实体并保存更改。我总是遇到以下错误：
The operation couldn’t be completed. (Cocoa error 1550.)
方式：
- (BOOL) updateEvent:(EventDTO*)eventDTO{
BOOL saved = YES;
[self getDataCoreContext];
if (context) {
NSError *error;
Event *myEvent = (Event *)[context existingObjectWithID:eventDTO.entitysID error:&error];
myEvent.name = eventDTO.name;
myEvent.descrptn = eventDTO.description;
myEvent.date = eventDTO.date;
myEvent.locLatitude = [eventDTO getLatidude];
myEvent.locLongitude = [eventDTO getLongitude];
myEvent.numberOfInvited= [NSNumber numberWithInteger:[eventDTO.invitedMembers count]];
for (User *invUser in eventDTO.invitedMembers) {
[myEvent addInvitedUsersObject:invUser];
}
for (User *accUser in eventDTO.acceptedMembers) {
[myEvent addAcceptedUsersObject:accUser];
}
myEvent.createdBy = (User*)[context existingObjectWithID:eventDTO.creator.objectID error:&error];
if (![context save:&error]) {
NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]);
saved = NO;
}
}
return saved;
}
我真的很困惑，因为我没有得到它的问题是什么..我也试图获取对象并修改它。但同样的错误。
任何解释或提示都会很棒。
编辑（完整错误对象）1：
ERROR: Error Domain=NSCocoaErrorDomain Code=1550 "The operation couldn’t be completed. (Cocoa error 1550.)" UserInfo=0x14a00130 {NSValidationErrorObject=<Event: 0x11024aa0> (entity: Event; id: 0x166c0840 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8> ; data: {
acceptedUsers = (
);
createdBy = "0x11024ae0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p1>";
date = "2013-05-11 16:15:09 +0000";
descrptn = Auauuauau;
invitedUsers = (
"0x11069cd0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p3>",
"0x1104da60 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p6>",
"0x1104da40 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p4>",
"0x110687a0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p2>",
"0x1104da50 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p5>"
);
locLatitude = "51.45373916625977";
locLongitude = "7.264190196990967";
name = lALLALLa;
numberOfInvited = 5;
}), NSValidationErrorKey=invitedUsers, NSLocalizedDescription=The operation couldn’t be completed. (Cocoa error 1550.), NSValidationErrorValue=Relationship 'invitedUsers' on managed object (0x11024aa0) <Event: 0x11024aa0> (entity: Event; id: 0x166c0840 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8> ; data: {
acceptedUsers = (
);
createdBy = "0x11024ae0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p1>";
date = "2013-05-11 16:15:09 +0000";
descrptn = Auauuauau;
invitedUsers = (
"0x11069cd0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p3>",
"0x1104da60 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p6>",
"0x1104da40 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p4>",
"0x110687a0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p2>",
"0x1104da50 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p5>"
);
locLatitude = "51.45373916625977";
locLongitude = "7.264190196990967";
name = lALLALLa;
numberOfInvited = 5;
}) with objects {(
<User: 0x110accb0> (entity: User; id: 0x11069cd0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p3> ; data: {
acceptedEvents = "<relationship fault: 0x97084a0 'acceptedEvents'>";
createdEvents = "<relationship fault: 0x97017b0 'createdEvents'>";
deviceInfo = nil;
displayName = "Daniel Higgins";
invitedToEvents = (
"0x110abbb0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x166c0840 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x110abba0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p5>"
);
memberShipDetails = nil;
phoneNumber = "555-478-7672";
realName = "Daniel Higgins";
status = "WAZZUUP?!";
userID = nil;
}),
<User: 0x110d0e10> (entity: User; id: 0x1104da60 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p6> ; data: {
acceptedEvents = "<relationship fault: 0x14aa0850 'acceptedEvents'>";
createdEvents = "<relationship fault: 0x13c0f290 'createdEvents'>";
deviceInfo = nil;
displayName = "Hank Zakroff";
invitedToEvents = (
"0x110abbb0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x166c0840 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x110abba0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p5>"
);
memberShipDetails = nil;
phoneNumber = "(555) 766-4823";
realName = "Hank Zakroff";
status = "WAZZUUP?!";
userID = nil;
}),
<User: 0x110ad1a0> (entity: User; id: 0x1104da40 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p4> ; data: {
acceptedEvents = "<relationship fault: 0x16632850 'acceptedEvents'>";
createdEvents = "<relationship fault: 0x16632890 'createdEvents'>";
deviceInfo = nil;
displayName = "John Appleseed";
invitedToEvents = (
"0x110abbb0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x166c0840 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x110abba0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p5>"
);
memberShipDetails = nil;
phoneNumber = "888-555-5512";
realName = "John Appleseed";
status = "WAZZUUP?!";
userID = nil;
}),
<User: 0x110b3220> (entity: User; id: 0x110687a0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p2> ; data: {
acceptedEvents = "<relationship fault: 0x110f50f0 'acceptedEvents'>";
createdEvents = "<relationship fault: 0x16628a60 'createdEvents'>";
deviceInfo = nil;
displayName = "Kate Bell";
invitedToEvents = (
"0x110abbb0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x166c0840 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x110abba0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p5>"
);
memberShipDetails = nil;
phoneNumber = "(555) 564-8583";
realName = "Kate Bell";
status = "WAZZUUP?!";
userID = nil;
}),
<User: 0x110ace30> (entity: User; id: 0x1104da50 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/User/p5> ; data: {
acceptedEvents = "<relationship fault: 0x1a4c6350 'acceptedEvents'>";
createdEvents = "<relationship fault: 0x1a4c6390 'createdEvents'>";
deviceInfo = nil;
displayName = "Anna Haro";
invitedToEvents = (
"0x110abbb0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x166c0840 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x110abba0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p5>"
);
memberShipDetails = nil;
phoneNumber = "555-522-8243";
realName = "Anna Haro";
status = "WAZZUUP?!";
userID = nil;
})
)}}
编辑2：
根据@Sulthan的好解释，我找到了问题。
在我的for循环中，我必须检查该用户是否已存在于该事件中：
for (User *invUser in eventDTO.invitedMembers) {
BOOL existsInInvitedList = [[eventDTO.invitedMembers valueForKeyPath:@"objectID"] containsObject:invUser.objectID];
if (!existsInInvitedList) {
[myEvent addInvitedUsersObject:invUser];
}
}
for (User *accUser in eventDTO.acceptedMembers) {
BOOL existsInAcceptedList = [[eventDTO.acceptedMembers valueForKeyPath:@"objectID"] containsObject:accUser.objectID];
if (!existsInAcceptedList) {
[myEvent addAcceptedUsersObject:accUser];
}
}
所以那里没有重复......
答案 0 :(得分：8)
说明：
NSValidationErrorObject=<Event: 0x11024aa0> ...
这是您尝试保存并验证失败的对象
NSValidationErrorKey=invitedUsers
这是验证失败的属性（关系）
NSValidationErrorValue=Relationship 'invitedUsers' on managed object (0x11024aa0)
验证失败了。其他一切都是关系中用户的列表...
我不知道您的对象模型，但例如以下似乎是错误的：
invitedToEvents = (
"0x110abbb0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x166c0840 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p8>",
"0x110abba0 <x-coredata://9F88714B-84EC-4E8F-9BC4-78E365A8FE0A/Event/p5>"
);
请注意，其中一个事件有两次（它具有相同的对象ID）。
答案 1 :(得分：3)
可可错误1550意味着你有一个“晃来晃去”的指针，更具体地说是一个指向无处的关系的引用......我想你可能会从existinObjectWithID方法中找到一个零？
答案 2 :(得分：0)
我也遇到了1550错误代码。我不小心改变了数据模型 修改了实体中某个关系的目标。确保仔细检查NSValidationErrorObject描述的实体和NSValidationErrorKey描述的关系是否是您想要的实体。