Re: storing ivars in core data docs
On Dec 22, 2009, at 21:40, Rainer Standke wrote: is there a way to store regular ivars in docs of a core data doc-based applictions? What's a doc? Seriously, are you talking about a file, or a NSPersistentDocument subclass instance, or what? If you're asking Is it possible to archive arbitrary values as raw binary data or perhaps using the NSKeyedArchiver mechanism in a persistent store alongside but not within the Core Data database? then the answer is no. You have to implement persistent storage for a value kept in a regular ivar as a property of some Core Data entity using the techniques described in the Core Data documentation. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: storing ivars in core data docs
On 23/12/2009, at 9:18 PM, Quincey Morris wrote: What's a doc? Seriously, are you talking about a file, or a NSPersistentDocument subclass instance, or what? If you're asking Is it possible to archive arbitrary values as raw binary data or perhaps using the NSKeyedArchiver mechanism in a persistent store alongside but not within the Core Data database? then the answer is no. You have to implement persistent storage for a value kept in a regular ivar as a property of some Core Data entity using the techniques described in the Core Data documentation. That's not 100% true, you can store an NSFileWrapper that contains a Core Data store as well as other files, so you can store whatever data you like. See this sample code for an example: http://developer.apple.com/mac/library/samplecode/PersistentDocumentFileWrappers/ It's not perfect but it certainly works. For the OP, as Quincey pointed out, your question is not clear. What are you trying to do? -- Rob Keniger ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: storing ivars in core data docs
On Dec 23, 2009, at 03:28, Rob Keniger wrote: On 23/12/2009, at 9:18 PM, Quincey Morris wrote: What's a doc? Seriously, are you talking about a file, or a NSPersistentDocument subclass instance, or what? If you're asking Is it possible to archive arbitrary values as raw binary data or perhaps using the NSKeyedArchiver mechanism in a persistent store alongside but not within the Core Data database? then the answer is no. You have to implement persistent storage for a value kept in a regular ivar as a property of some Core Data entity using the techniques described in the Core Data documentation. That's not 100% true, you can store an NSFileWrapper that contains a Core Data store as well as other files, so you can store whatever data you like. See this sample code for an example: http://developer.apple.com/mac/library/samplecode/PersistentDocumentFileWrappers/ It's not perfect but it certainly works. Well, FWIW it was 100% true because I deliberately specified in a persistent store. :) A file wrapper (or, *shudder*, a resource fork) might be a solution for a determined person, but it would be far easier to embed the data in a Core Data property. Assuming that this is what the OP is asking about to begin with. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: storing ivars in core data docs
On 12/23/09 4:10 AM, Quincey Morris said: A file wrapper (or, *shudder*, a resource fork) might be a solution for a determined person, but it would be far easier to embed the data in a Core Data property. Yup. But then you have the joy of persistent store migration. :( Another option might be to use the metadata methods, like metadataForPersistentStore:. -- Sean McBride, B. Eng s...@rogue-research.com Rogue Researchwww.rogue-research.com Mac Software Developer Montréal, Québec, Canada ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: storing ivars in core data docs
Yes, that was my question. Thanks for your help, Rainer On Dec 23, 2009, at 3:18 , Quincey Morris wrote: On Dec 22, 2009, at 21:40, Rainer Standke wrote: is there a way to store regular ivars in docs of a core data doc- based applictions? What's a doc? Seriously, are you talking about a file, or a NSPersistentDocument subclass instance, or what? If you're asking Is it possible to archive arbitrary values as raw binary data or perhaps using the NSKeyedArchiver mechanism in a persistent store alongside but not within the Core Data database? then the answer is no. You have to implement persistent storage for a value kept in a regular ivar as a property of some Core Data entity using the techniques described in the Core Data documentation. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/lists%40standke.com This email sent to li...@standke.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
storing ivars in core data docs
Hello, is there a way to store regular ivars in docs of a core data doc-based applictions? Rainer ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
