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#include <Foundation/Foundation.h>
#include <EOAccess/EOAccess.h>
#include <EOControl/EOControl.h>
int
main(int arcg, char *argv[], char **envp)
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
EOModelGroup *group = [EOModelGroup defaultGroup];
EOModel *model;
EOAdaptor *adaptor;
EOAdaptorContext *context;
EOAdaptorChannel *channel;
EOEditingContext *ec;
EODatabaseDataSource *authorsDS;
EODataSource *booksDS;
id author;
id book;
model = [group modelNamed:@"library"];
/* Tools do not have resources so we add the model manually. */
if (!model)
{
NSString *path = @"./library.eomodel";
model = [[EOModel alloc] initWithContentsOfFile: path];
[group addModel:model];
[model release];
}
adaptor = [EOAdaptor adaptorWithModel:model];
context = [adaptor createAdaptorContext];
channel = [context createAdaptorChannel];
ec = [[EOEditingContext alloc] init];
authorsDS
= [[EODatabaseDataSource alloc] initWithEditingContext: ec
entityName:@"authors"];
[channel openChannel];
author = [authorsDS createObject];
[author takeValue:@"Richard Brautigan" forKey:@"name"];
[authorsDS insertObject:author];
booksDS = [authorsDS dataSourceQualifiedByKey:@"toBooks"];
[booksDS qualifyWithRelationshipKey:@"toBooks" ofObject:author];
book = [booksDS createObject];
[book takeValue:@"The Hawkline Monster" forKey:@"title"];
[booksDS insertObject:book];
book = [booksDS createObject];
[book takeValue:@"Trout Fishing in America" forKey:@"title"];
[booksDS insertObject:book];
[ec saveChanges];
/* log the to many relationship from author to books */
NSLog(@"%@ %@",
[author valueForKey:@"name"],
[author valueForKeyPath:@"toBooks.title"]);
/* log the to one relationship from book to author */
NSLog(@"%@", [book valueForKeyPath:@"toAuthor.name"]);
/* traverse to one through the to many through key paths
logging the author once for each book. */
NSLog(@"%@", [author valueForKeyPath:@"toBooks.toAuthor.name"]);
[channel closeChannel];
[pool release];
return 0;
}
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