I have a one-to-many relationship between the Pai and Filho entities, where a Pai can have any or N Filho .
Using Core Data , how do I search all Filho , basing my search for a Pai .
For example:
I have a Pai that has Id 1. I need to search all Filho that has Pai with Id 1.
Just use the property names of both the entity and the relationship in the NSPredicate condition to make the request.
Swift :
let request = NSFetchRequest(entityName: "Filho")
request.predicate = NSPredicate(format: "RelacionamentoPai.Id == %d", 1)
Objective-C :
NSFetchRequest *request = [[NSFetchRequest alloc] initWithEntityName:@"Filho"];
[request setPredicate:[NSPredicate predicateWithFormat:@"RelacionamentoPai.Id == %d", 1]];