MacRuby から CoreData

アプリに入れるデータは MacRuby で作っていたりします。Objective-C でも良いんだけど、コンパイルとか面倒だし、テキスト処理は Ruby だと楽チンだし♪

#! /usr/local/bin/macruby
# coding:utf-8
#

framework 'Foundation'
framework 'CoreData'

DB_NAME = "Question"
ENTITY_NAME = "Question"

class DB
  def managedObjectModel
    if (@managedObjectModel != nil)
        return @managedObjectModel
    end
    modelURL = NSURL.URLWithString Dir.pwd+"/#{DB_NAME}.momd"
    @managedObjectModel = NSManagedObjectModel.alloc.initWithContentsOfURL(modelURL)   
    return @managedObjectModel
  end

  def persistentStoreCoordinator
    if (@persistentStoreCoordinator != nil)
        return @persistentStoreCoordinator
    end
    
    storeURL = NSURL.fileURLWithPath Dir.pwd+"/#{DB_NAME}.sqlite"
   
    error = Pointer.new(:object)
    @persistentStoreCoordinator = NSPersistentStoreCoordinator.alloc.initWithManagedObjectModel(self.managedObjectModel)
    if (!@persistentStoreCoordinator.addPersistentStoreWithType(NSSQLiteStoreType, configuration:nil, URL:storeURL, options:nil, error:error))
        puts "Unresolved error #{error}, #{error.userInfo}"
        abort()
    end
    
    return @persistentStoreCoordinator
    
  end

  def managedObjectContext
    if (@managedObjectContext != nil)
        return @managedObjectContext
    end
    
    coordinator = self.persistentStoreCoordinator
    if (coordinator != nil)
        @managedObjectContext = NSManagedObjectContext.alloc.init
        @managedObjectContext.setPersistentStoreCoordinator(coordinator)
    end
    return @managedObjectContext
  end



  def saveContext
    error = Pointer.new(:object)
    managedObjectContext = self.managedObjectContext
    if (managedObjectContext != nil)
        if (managedObjectContext.hasChanges || !managedObjectContext.save(error))
            puts "Unresolved error #{error}, #{error.userInfo}"
            abort()
        end
    end
  end
    
end

`/Developer/usr/bin/momc #{DB_NAME}.xcdatamodeld #{DB_NAME}.momd`
if File.exist? "#{DB_NAME}.sqlite"
  File.delete "#{DB_NAME}.sqlite"
end

db = DB.new
p model = db.managedObjectModel

var = {"YEAR" => 2010}
request = model.fetchRequestFromTemplateWithName("QuestionsWithYear", substitutionVariables:var)

p request.predicate.predicateFormat

db.saveContext