Hello Michael, On 11.04.2012, at 00:18, Michael Parchet wrote:
> Hello, > > I have started a billing project with coco and core data. In my project, I > have a form that the user must fill to add a customer (for example) but it > seems that core data have only an array controller with a manage object > context to manage the core data database. Is it true ? no. You don't have to use a NSArrayController. > > In some language (such as java), I can send some sql query to the database. > such as (insert into Customeer etc..), I can also send a set of query > (transaction). > > On the apple website, in a guide, I have reed an information about fetch > request How it work ? Can the fetch request help me in my project ? CoreData is a complex technology, if you don't already read the Core Data Programming Guide https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreData/cdProgrammingGuide.html#//apple_ref/doc/uid/TP40001075 now is the time to do so … For example your example "insert a Customer": context is a NSManagedObjectContext, "Customer" your Customer entity NSManagedObject *customer = [NSEntityDescription insertNewObjectForEntityForName:@"Customer" inManagedObjectContext:context]; that's all. After that you use the customer. On context>>save: the new customer is written to disk (if you don't use a in memory persistent store…). A fetch request fetches as the name implies … CoreData is not a ORM-framework. sqlite is available as a persistent store type, but you can't access the database directly. Cheers, Felix _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
