Re: New allowsExternalBinaryDataStorage in Core Data
Re: New allowsExternalBinaryDataStorage in Core Data
- Subject: Re: New allowsExternalBinaryDataStorage in Core Data
- From: Frédéric Testuz <email@hidden>
- Date: Thu, 25 Aug 2011 21:03:36 +0200
Thanks,
Then for application where the user can choose the location of document, you can use it safely only if the store is in a package. If the document is moved/copied, the extern data are also moved/copied.
I had made some test with stores in the Desktop and after your reply I had found many hidden folder for each of my test.
And, in the video I talked about, they speak about a new example for Lion that will be available in some weeks. Some weeks have passed since the WWDC and I can't find this example. Is it available only for Xcode 4.2 ?
Frédéric
Le 25 août 2011 à 20:20, Steven Vandeweghe a écrit :
> It seems that when the image (or data in general) is larger than 1MB, it's stored in a hidden folder in the same place as your main database. For example, if the application is called MyLionApp and its persistent store is located in the ~/Library/MyLionApp folder, the external files would be stored in ~/Library/MyLionApp/.MyLionApp_SUPPORT/_EXTERNAL_DATA/.
>
> The documentation is indeed very sparse, so I've investigated a bit myself and posted the results here :
>
> http://bluecrowbar.com/blog/2011/08/coredata-external.html
>
> Steven
>
>
> On Aug 3, 2011, at 10:29 PM, Frédéric Testuz wrote:
>
>> Hello,
>>
>> I looked at the Core Data release notes of Lion, I also looked the "What's new in Core Data on Mac OS X" video of the WWDC 2011. And I have a question about the new allowsExternalBinaryDataStorage option for binary attribute.
>>
>> I did some test with an attribute for images. I can see that when I put an big image in the data, the file did not grow.
>>
>> But where the external file/data is put? If the file is moved or copied, what about theses external data? I tried to find info, but the documentation is very sparse.
>>
>> Frédéric_______________________________________________
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