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views:

315

answers:

1
Q: 

Mapping obj-c object to sqlite database

Hello

Im looking for a simple (if I can call it that) mapping tool for obj-c, that maps objects and their relationships to a sqlite database. Is there any out there that acts like db4o for java? I havent found anything on google, and I think its because Im not completly sure of where to look and what to look for. Hope someone can help, because I dont want to write my own mapping tool to sqlite.

EDIT it seems like entropyDb does the job. http://code.google.com/p/entropydb/. But Im not sure yet.

I dont quite understand this line: "One cannot store instances of Cocoa classes directly. Collections (NSArray, NSSet, NSDictionary) can be stored if they are instance variables of custom objects." I read it like I cant store arrays and sets if they are instance variables of a custom object.

+3  A: 

You're looking for Core Data, which is part of the iPhone SDK.

Graham Lee  2009-07-23 12:16:55
Oh. Im new to iPhone development :) Im not at all into it yet. Dont know what that is.
mslot  2009-07-23 12:23:59
@mslot: well the link is to the "Introduction to Core Data", which _may_ tell you what it is...
Graham Lee  2009-07-23 12:40:52
I must say that I dont get it :)
mslot  2009-07-23 12:50:46
EntropyDb seems to be a db4O ripoff. http://code.google.com/p/entropydb/
mslot  2009-07-23 13:07:32
Um, Core Data stores Objective C objects in a SQLite database. It's included in both OS X and iPhone OS 3.
Stephen Darlington  2009-07-23 13:21:43
Stephen, that I do get. But how is it done. I cant figure it out from that link.
mslot  2009-07-23 13:29:13
@mslot: there are Core Data tutorials on Apple's web site.
Graham Lee  2009-07-23 15:56:54

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