SOLVED: Programatically manipulating an xcdatamodel package?
SOLVED: Programatically manipulating an xcdatamodel package?
- Subject: SOLVED: Programatically manipulating an xcdatamodel package?
- From: Allen Cronce <email@hidden>
- Date: Sat, 7 Jun 2008 06:44:14 -0700
As suspected, I couldn't come up with a way to directly edit the
xcdatamodel. I tried using NSKeyedUnarchiver to obtain the object
graph for the xcdatamodel's "elements" plist. This failed because the
resulting objects are implemented in the private XDBase framework.
To solve the problem I wrote a command line tool that does the
following:
1. Compiles the model into a temp file using Xcode's momc.
2. Initializes an NSManagedObjectModel object with the compiled model.
3. Enumerates and manipulates the NSManagedObjectModel object in memory.
4. Uses NSKeyedArchiver archiveRootObject to write out the modified
mom file.
Once I've got the modified mom file, I manually import it back into a
clean data model using Xcode. At this point, the updated model can be
viewed or edited using Xcode's data modeling tool.
Best,
Allen Cronce
On Jun 1, 2008, at 10:07 AM, Allen Cronce wrote:
Hi all,
I'm interested in programmatically manipulating "User Info" key/
value pairs in a large data model package. The resulting saved
xcdatamodel package will be used for automatic code generation via
mogenerator and custom templates. This doesn't have to happen often,
so it does not need to be fancy or automated.
I'm open to any way to do this, including scripting Xcode to modify
the model, or writing a command line utility that manipulates the
package directly. Unfortunately a cursory look at the "elements"
plist file indicates to me that manipulating its proprietary
structure might be challenging.
Maybe the right way to do this is to momc the xcdatamodel package,
manipulate the compiled result with the NSManagedObjectModel API's,
then import the .mom file back into Xcode?
Thanks in advance for any suggestions.
Best,
Allen Cronce
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