CoreDataEditor is $20 and doesn’t make it quick and easy to browse the relationships of the managed object context. There was also some insanity about having to have the MOM use exactly the same name as your application (??!), or somesuch. I’m not about to go in and start renaming stuff just to browse my object store. Admittedly, it does have a pretty cool application icon, and I assume from the name that you can edit stuff. But, like the original poster, I just need something that will let me crack open a Core Data persistent store and quickly grok my managed objects.
I’ve found that a much better solution, one which offers intuitive and easy browsing of the relationships of managed objects, and which is free, is detailed here:
Browsing Core Data databases using F-Script
You basically install F-Script, and then run Mr. Tyson’s Applescript, which asks you to locate your MOM (e.g., YourApp.app) and then the SQLite database that is being used as the persistent store (i.e., YourAppPersistentStore.sqlite). If you are using the iPhone Simulator, these are both in your Simulator directory — for example:
/Users/me/Library/Application\ Support/iPhone\ Simulator/4.2/Applications/5452AC87-0426-4303-9402-C5F5900C7321/YourApp.app
/Users/me/Library/Application\ Support/iPhone\ Simulator/4.2/Applications/5452AC87-0426-4303-9402-C5F5900C7321/Documents/db/YourAppPersistentStore.sqlite
Then select an Entity and hit ‘fetch’. You can run a NSPredicates to filter its items, or click on an item and click ‘Browse’. It opens “F-Script Object Browser” and from this window, you can follow relationships and basically tour all the items in your entire managed object context, inspecting all the attributes for each item. It’s super awesome.