YapDatabasePolicy

enum YapDatabasePolicy {}

YapDatabase allows you to opt-in to advanced performance optimizations.

The Object-Policy is documented on the wiki here: https://github.com/yapstudios/YapDatabase/wiki/Object-Policy

  • This is the default policy, unless configured otherwise.

    Declaration

    Objective-C

    YapDatabasePolicyContainment = 0

    Swift

    case containment = 0

  • An advanced technique that allows you to share the same instance of an object between databaseConnection’s. This is VERY dangerous, unless the object is immutable. In which case it becomes safe, and you get a performance benefit from it.

    The Object-Policy is documented on the wiki here: https://github.com/yapstudios/YapDatabase/wiki/Object-Policy

    Declaration

    Objective-C

    YapDatabasePolicyShare = 1

    Swift

    case share = 1

  • An advanced technique that copies objects from one databaseConnection to another. This only works if the object supports NSCopying.

    This can be dangerous, if you don’t perform copying correctly. That is, you need to ensure that changes to an original object cannot affect copies of the object. This is generally what one would expect to happen, but its also easy to get wrong.

    The Object-Policy is documented on the wiki here: https://github.com/yapstudios/YapDatabase/wiki/Object-Policy

    Declaration

    Objective-C

    YapDatabasePolicyCopy = 2

    Swift

    case copy = 2