NSEntityDescription Class Reference

[[entity copy] isEqual:entity] == NO

NSEntityDescription *anEntity = ...;

for (NSPropertyDescription *property in anEntity) {

    // property is each instance of NSPropertyDescription in anEntity in turn

}

Tasks

Information About an Entity Description

• – name
• – setName:
• – managedObjectModel
• – managedObjectClassName
• – setManagedObjectClassName:
• – renamingIdentifier
• – setRenamingIdentifier:
• – isAbstract
• – setAbstract:
• – userInfo
• – setUserInfo:

Managing Inheritance

• – subentitiesByName
• – subentities
• – setSubentities:
• – superentity
• – isKindOfEntity:

Working with Properties

• – propertiesByName
• – properties
• – setProperties:
• – attributesByName
• – relationshipsByName
• – relationshipsWithDestinationEntity:

Retrieving an Entity with a Given Name

• + entityForName:inManagedObjectContext:

Creating a New Managed Object

• + insertNewObjectForEntityForName:inManagedObjectContext:

Managing Versioning Support

• – versionHash
• – versionHashModifier
• – setVersionHashModifier:

Copying Entity Descriptions

• – copy

Managing Compound Indexes

• – compoundIndexes
• – setCompoundIndexes:

NSManagedObjectModel *managedObjectModel = [[context persistentStoreCoordinator] managedObjectModel];

NSEntityDescription *entity = [[managedObjectModel entitiesByName] objectForKey:entityName];

return entity;

NSManagedObjectModel *managedObjectModel =

        [[context persistentStoreCoordinator] managedObjectModel];

NSEntityDescription *entity =

        [[managedObjectModel entitiesByName] objectForKey:entityName];

NSManagedObject *newObject = [[NSManagedObject alloc]

            initWithEntity:entity insertIntoManagedObjectContext:context];

return newObject;

[[entity copy] isEqual:entity] == NO