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#mogenerator + Xmo'd

Visit the project's pretty homepage.

Here's mogenerator's elevator pitch:

mogenerator is a command-line tool that, given an .xcdatamodel file, will generate two classes per entity. The first class, _MyEntity, is intended solely for machine consumption and will be continuously overwritten to stay in sync with your data model. The second class, MyEntity, subclasses _MyEntity, won't ever be overwritten and is a great place to put your custom logic.

Using mogenerator

Senseful wrote up a nice summary of mogenerator's command-line options.

Using Xmo'd

Xmo'd (pronounced ex-mowed) is an Xcode plugin that integrates mogenerator into Xcode. It saves you the hassle of having to write a Run Script Build Phase and/or manually adding+removing source files from your project as you add+remove entities.

Xmo'd works by noticing when your *.xcdatamodel is saved. If the model file's Xcode project item comment contains xmod, an AppleScript is fired that creates a folder based on your model's file name and populates it with derived source code files from your model. It then adds the new folder to your project as a Group Reference and adds all the source files to your project.

Version History

v1.23: Sun Jul 10 2011 download

  • [NEW] Support for Mac OS X 10.7 Lion's ordered relationships (generated relationship code uses NSOrderedSet and NSMutableOrderedSet). (rentzsch 1 2 3)

  • [NEW] Optional support for ARC: pass --template-var arc=true to mogenerator. bug 63 (Adam Cox)

  • [NEW] New template that dumps a binary .xcdatamodel into a pseudo-ASCII-plist format perfect for diffing. A great way to compare two versions of a data model. (Brian Webster)

  • [NEW] Attributes and relationships are now sorted for generation. This should eliminate spurious changes to source files when unrelated model entities are changed. After upgrading to 1.23 you probably want to regenerate all your source files without a model change, just to let things settle in before your next real model change. (Nikita Zhuk)

  • [NEW] Support for generation of PONSOs: Plain Old NSObjects. These are in-memory, typesafe non-CoreData classes generated from your Xcode data models. Generate reams of ObjC classes from a single data model. Supports relationships and basic serialization. See contributed templates/Nikita Zhuk/ponso/README.txt for details. (Nikita Zhuk)

  • [NEW] Support for momc error-reporting options: MOMC_NO_WARNINGS, MOMC_NO_INVERSE_RELATIONSHIP_WARNINGS and MOMC_SUPPRESS_INVERSE_TRANSIENT_ERROR. (Nikita Zhuk)

  • [NEW] Now generates output directories if they don't already exist or presents an error message if they cannot be created. (Scott Little)

  • [CHANGE] Change #include to #import in include.m. (Zac Bowling)

  • [NEW] You can now use --template-var to pass arbitrary command-line options through to templates. (Adam Cox)

  • [NEW] Update MiscMerge to NS(U)Integer for 64-bit compatibility. (Nikita Zhuk)

  • [FIX] Memory leaks in MiscMerge. (Nikita Zhuk)

  • [CHANGE] mogeneratorTestMule's mogenerate.command upgraded to use double-dash option names. (rentzsch)

  • [FIX] Set mogeneratorTestMule's mogenerate.command executable bit. (rentzsch)

v1.22: Wed Mar 2 2011 download

  • [FIX] Xmo'd 1.21 introduced a bug where it would no longer create a source folder for your data model (it would work fine it one already existed). bug 43 (rentzsch)

  • [NEW] -keyPathsForValuesAffectingValueForKey: is now generated in machine.m files, populated by your entity's scalar attributes. The idea is code like myObject.myIntAttributeValue++ tells Core Data that myIntAttribute has changed (handy when you're KVO-observing myIntAttribute). (Tony Arnold)

  • [NEW] When a model file has multiple versions (.xcdatamodeld files) Xmo'd now uses the "current" version of the model (set the "xmod" command on the xcdatamodeld group). (Vincent Guerci)

  • [NEW] Support undefined attribute types. (Brian Doig)

  • [NEW] mogenerator and Xmo'd now supports model-relative paths for the --template-path argument. (tonklon)

v1.21: Mon Nov 1 2010 download

  • [NEW] Machine templates now include fetched properties by default. (Jonathan del Strother)

  • [NEW] Xmo'd: better support for --(machine|human|output)-dir model option path: now they can be full or relative to the model file. Xcode group and file references are no longer deleted/re-added with every save. (John Turnipseed)

  • [NEW] Xmo'd: --log-command model option. When enabled, Xmo'd will log (to Console.app) the generated+executed mogenerator invocation. Good for automation debugging and also can provide training wheels for using mogenerator directly. (rentzsch)

  • [FIX] Avoid nil substitution dictionary in generated fetch request wrapper code, which resulted in an NSInvalidArgumentException reason "Cannot substitute a nil substitution dictionary." (Anthony Mittaz)

v1.20: Thu Aug 12 2010 download

  • [NEW] Xmo'd: model comments that start with -- are passed as args to mogenerator. This allows accessing command-line options such as --base-class. (David LeBer)

  • [NEW] Forward-declare transformable attribute class types. bug 11 (seanm)

  • [CHANGE] Generated accessors that return BOOLs now return NO instead of 0, avoiding LLVM Static Analyzer warnings. bug 8 (seanm)

  • [CHANGE] Generated value accessors that return ints no longer needlessly check for nil. bug 10 (seanm)

  • [CHANGE] LLVM 2/Xcode 4 doesn't like [NSDictionary dictionaryWithObjectsAndKeys:nil], issuing a "missing sentinel in method dispatch" warning. Add hasBindings to prettyFetchRequests so we can just generate NSDictionary *substitutionVariables = nil in that case. (Anthony Mittaz)

  • [FIX] Variable shadowing bug which would cause v1.19's xcode-select functionality to always fail. (Nikita Zhuk)

v1.19: Sun 4 Jul 2010 download

  • [NEW] Use xcode-select to dynamically discover our way to momc instead of only hard-coding /Developer. (Josh Abernathy)

v1.18: Thu 1 Jul 2010 download

  • [NEW] Xmo'd works with versioned data models. (rentzsch)

  • [NEW] Support for fetched properties (Nikita Zhuk)

  • [NEW] NSParameterAssert(moc) in fetch request wrappers. (rentzsch)

v1.17: Sat 27 Mar 2010 download

  • [NEW] +[Machine entityName] (for @drance) and +[Machine entityInManagedObjectContext:] (Michael Dales).

  • [NEW] --list-source-files option, which lists model-related source files. (rentzsch)

  • [NEW] Add --orphaned option. (rentzsch)

Couple --orphaned with --model to get a listing of source files that no longer have corresponding entities in the model. The intent is to be able to pipe its output to xargs + git to remove deleted and renamed entities in one command, something like:

$ mogenerator --model ../MyModel.xcdatamodel --orphaned | xargs git rm

v1.16: Mon 4 Jan 2010 download

  • [NEW] machine.h template now produces type-safe scalar attribute property declarations. (rentzsch)

  • [CHANGE] Remove machine.m implementations of to-many relationship setters. (rentzsch)

  • [CHANGE] Xmo'd: change file ordering to human.m, human.h, machine.m, machine.h (from human.h, human.m, machine.h, machine.m). (rentzsch)

  • [FIX] Missing space for fetch requests with multiple bindings. (Frederik Seiffert)

v1.15: Mon 2 Nov 2009 download

  • [CHANGE] Xmo'd: now adds .h human+machine header files to project (in addition to current .m + .mm files). (rentzsch)

  • [NEW] Now supports key paths in fetch request predicates so long as they're relationships. (Jon Olson)

  • [FIX] Log fetch-request-wrapper errors to NSLog() on iPhone since it lacks -[NSApp presentError:]. (rentzsch)

  • [NEW] +insertInManagedObjectContext: NSParameterAssert()'s its moc arg. (rentzsch)

v1.14: Fri 9 Oct 2009 download

  • IMPORTANT: 1.14 generates code that may be incompatible with clients of 1.13-or-earlier generated code. +newInManagedObjectContext: has been replaced with +insertInManagedObjectContext: and method implementations have been replaced with @dynamic, which don't work so well with overriding (most of these uses can be replaced with Cocoa Bindings). Upgrade only if you have spare cycles to fix-up existing projects.

  • [CHANGE] changed +newInManagedObjectContext: to +insertInManagedObjectContext: to satisfy the LLVM/clang static analyser. (Ruotger Skupin)

  • [CHANGE] Default machine templates now use @dynamic. The old templates still available in contributed templates/rentzsch non-dynamic. (Pierre Bernard)

  • [CHANGE] Xmo'd included again in default mogenerator installation -- the first time since 1.6. (rentzsch)

  • [CHANGE] Migrated project to github from self-hosted svn+trac installation.

  • [NEW] Xmo'd version checking whitelists Xcode versions 3.1(.x) and 3.2(.x).

  • [NEW] Dropped ppc support for Xmo'd. May reconsider if folks yelp. (rentzsch)

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