{"id":48871,"date":"2025-08-12T15:24:48","date_gmt":"2025-08-12T19:24:48","guid":{"rendered":"https:\/\/mjtsai.com\/blog\/?p=48871"},"modified":"2025-08-12T15:27:29","modified_gmt":"2025-08-12T19:27:29","slug":"swiftdata-runtime","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2025\/08\/12\/swiftdata-runtime\/","title":{"rendered":"SwiftData Runtime"},"content":{"rendered":"

Richard Witherspoon<\/a>:<\/p>\n

I’m working with SwiftData<\/code> and trying to replicate behavior similar to what I used to do with CoreData<\/code>, where I had an extension on NSManagedObjectContext<\/code> that allowed me to fetch all stored objects, regardless of entity type.<\/p>

[…]<\/p>

I’m now using SwiftData<\/code> with @Model<\/code> types and the ModelContext<\/code>, and I want to dynamically fetch all objects from the store at runtime, without manually specifying each type. I understand that SwiftData<\/code> is designed to be more type-safe and less dynamic than CoreData<\/code>, but is there any way to accomplish this without traversing through the raw SQLite file manually?<\/p><\/blockquote>\n\n

This sort of metaobject stuff is really easy to do with Core Data, using public APIs available from the very first version. Currently, with SwiftData you need a fragile Mirror<\/code> hack to get a PersistentModel<\/code> from a Schema.Entity<\/code>.<\/p>\n\n

Previously:<\/p>\n