# PredicateCodableConfiguration A specification of the expected types and key paths found in an archived predicate. ``` struct PredicateCodableConfiguration ``` ## Overview Use this configuration when encoding and decoding a predicate to restrict what that predicate can contain. If a predicate contains data types or keypaths that aren’t allowed by the configuration, the encoding or decoding process throws an error. ```swift var configuration = PredicateCodableConfiguration.standardConfiguration configuration.allowType(Message.self, identifier: "MyApp.Message") configuration.allowType(Person.self, identifier: "MyApp.Person") configuration.allowKeyPath(\Message.sender, identifier: "MyApp.Message.sender") configuration.allowKeyPath(\Person.firstName, identifier: "MyApp.Person.firstName") configuration.allowKeyPath(\Person.lastName, identifier: "MyApp.Person.lastName") struct MyRequest: Codable { let predicate: Predicate func encode(to encoder: Encoder) throws { var container = encoder.container(keyedBy: CodingKeys.self) try container.encode(predicate, forKey: .predicate, configuration: configuration) } init(from decoder: Decoder) throws { let container = try decoder.container(keyedBy: CodingKeys.self) predicate = try container.decode(Predicate.self, forKey: .predicate, configuration: configuration) } } ``` ## Topics ### Creating a configuration [`init()`](/documentation/Foundation/PredicateCodableConfiguration/init()) [`standardConfiguration`](/documentation/Foundation/PredicateCodableConfiguration/standardConfiguration) ### Allowing types and key paths [`allow(_:)`](/documentation/Foundation/PredicateCodableConfiguration/allow(_:)) [`allowKeyPathsForPropertiesProvided(by:recursive:)`](/documentation/Foundation/PredicateCodableConfiguration/allowKeyPathsForPropertiesProvided(by:recursive:)) [`allowPartialType(_:identifier:)`](/documentation/Foundation/PredicateCodableConfiguration/allowPartialType(_:identifier:)) [`allowType(_:identifier:)`](/documentation/Foundation/PredicateCodableConfiguration/allowType(_:identifier:)) ### Disallowing types and key paths [`disallowKeyPathsForPropertiesProvided(by:recursive:)`](/documentation/Foundation/PredicateCodableConfiguration/disallowKeyPathsForPropertiesProvided(by:recursive:)) [`disallowPartialType(_:)`](/documentation/Foundation/PredicateCodableConfiguration/disallowPartialType(_:)) [`disallowType(_:)`](/documentation/Foundation/PredicateCodableConfiguration/disallowType(_:)) ### Instance Methods [`allowKeyPath(_:identifier:)`](/documentation/Foundation/PredicateCodableConfiguration/allowKeyPath(_:identifier:)) [`disallowKeyPath(_:)`](/documentation/Foundation/PredicateCodableConfiguration/disallowKeyPath(_:)) ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)