Core Data document-based apps saves empty files
Core Data document-based apps saves empty files
- Subject: Core Data document-based apps saves empty files
- From: Andrew Madsen <email@hidden>
- Date: Thu, 6 Jul 2006 18:27:40 -0600
I've got a document-based Core Data app that was previously working,
but is now broken. I can't figure out what I did to break it, but
the symptom is that saving doesn't work. I can fill up the document
with entities and hit save and it will save a file out, but the
window doesn't change to reflect that it is displaying a saved file,
it still has "Untitled" in the title bar and the close button shows
that there are unsaved changes, even immediately after saving. If I
save as XML, I get something like this in the XML file:
<?xml version="1.0"?>
<!DOCTYPE database SYSTEM "file:///System/Library/DTDs/CoreData.dtd">
<database>
<databaseInfo>
<version>134481920</version>
<UUID>C6303AF0-47D9-483B-AF0E-588E488C22E1</UUID>
<nextObjectID>101</nextObjectID>
<metadata></metadata>
</databaseInfo>
</database>
There should be entities with multiple attributes and relationships,
but instead, nothing. If I open one of these files, my app doesn't
complain it just opens up what appears to be a completely empty
document. It doesn't matter whether I save in Binary, SQL or XML,
the same thing happens.
I haven't purposely done anything to modify or control the save
functionality in my application. I'm relying on Core Data and the
defaults set up in the Core Data Document-Based app template.
However, obviously something I've done has caused a problem. I
haven't changed the default document types for my application. I've
tried deleting everything relating to my app, including the cache
and .plist file and rebuilding it with no effect. I haven't been
able to find anyone reporting this same problem by searching, so I'm
hoping someone here has seen it or has some idea why it may be
happening.
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