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Cascade deletion for RealmSwift
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import RealmSwift | |
import Realm | |
protocol CascadeDeleting: class { | |
func delete<Entity>(_ list: List<Entity>, cascading: Bool) | |
func delete<Entity>(_ results: Results<Entity>, cascading: Bool) | |
func delete<Entity: Object>(_ entity: Entity, cascading: Bool) | |
} | |
extension Realm: CascadeDeleting { | |
func delete<Entity>(_ list: List<Entity>, cascading: Bool) { | |
list.forEach { | |
delete($0, cascading: cascading) | |
} | |
} | |
func delete<Entity>(_ results: Results<Entity>, cascading: Bool) { | |
results.forEach { | |
delete($0, cascading: cascading) | |
} | |
} | |
func delete<Entity: Object>(_ entity: Entity, cascading: Bool) { | |
if cascading { | |
cascadeDelete(entity) | |
} else { | |
delete(entity) | |
} | |
} | |
} | |
private extension Realm { | |
private func cascadeDelete(_ entity: RLMObjectBase) { | |
guard let entity = entity as? Object else { return } | |
var toBeDeleted = Set<RLMObjectBase>() | |
toBeDeleted.insert(entity) | |
while !toBeDeleted.isEmpty { | |
guard let element = toBeDeleted.removeFirst() as? Object, | |
!element.isInvalidated else { continue } | |
resolve(element: element, toBeDeleted: &toBeDeleted) | |
} | |
} | |
private func resolve(element: Object, toBeDeleted: inout Set<RLMObjectBase>) { | |
element.objectSchema.properties.forEach { | |
guard let value = element.value(forKey: $0.name) else { return } | |
if let entity = value as? RLMObjectBase { | |
toBeDeleted.insert(entity) | |
} else if let list = value as? RealmSwift.ListBase { | |
for index in 0..<list._rlmArray.count { | |
toBeDeleted.insert(list._rlmArray.object(at: index)) | |
} | |
} | |
} | |
delete(element) | |
} | |
} |
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@cpd, Thanks a lot mate!
I was having trouble with
Resolve
function asRealmSwift.ListBase
is no longer supported inRealmSwift v10.17.0
.Your code with
RLMSwiftCollectionBase
helped me, Thanks again.