🐛 Fix a crash caused by UUID properties (#26)

Author: ftchirou

PredicateKit.podspec

@@ -15,7 +15,7 @@
 
 Pod::Spec.new do |spec|
   spec.name = "PredicateKit"
-  spec.version = "1.7.0"
+  spec.version = "1.8.0"
   spec.summary = "Write expressive and type-safe predicates for CoreData using key-paths, comparisons and logical operators, literal values, and functions."
   spec.description = <<-DESC
   PredicateKit allows Swift developers to write expressive and type-safe predicates for CoreData using key-paths, comparisons and logical operators, literal values, and functions.

PredicateKit/Predicate.swift

@@ -349,6 +349,7 @@ public struct ComparisonOptions: OptionSet {
   public static let caseInsensitive = ComparisonOptions(rawValue: 1 << 0)
   public static let diacriticInsensitive = ComparisonOptions(rawValue: 1 << 1)
   public static let normalized = ComparisonOptions(rawValue: 1 << 2)
+  public static let none = ComparisonOptions(rawValue: 1 << 3)
 
   public init(rawValue: Int) {
     self.rawValue = rawValue
@@ -718,11 +719,22 @@ extension Optional: ComparableCollection where Wrapped: ComparableCollection {
 // MARK: - Private Initializers
 
 extension Comparison {
+  fileprivate init<E: Expression, P: Primitive>(
+    _ expression: E,
+    _ `operator`: ComparisonOperator,
+    _ value: P
+  ) {
+    self.expression = AnyExpression(expression)
+    self.operator = `operator`
+    self.value = value
+    self.options = P.defaultComparisonOptions
+  }
+
   fileprivate init<E: Expression>(
     _ expression: E,
     _ `operator`: ComparisonOperator,
     _ value: Primitive,
-    _ options: ComparisonOptions = .caseInsensitive
+    _ options: ComparisonOptions
   ) {
     self.expression = AnyExpression(expression)
     self.operator = `operator`
@@ -759,3 +771,17 @@ extension ArrayElementKeyPath {
     }
   }
 }
+
+extension Primitive {
+  static var defaultComparisonOptions: ComparisonOptions {
+    switch type {
+    case .uuid:
+      return .none
+
+    // TODO: Add proper defaults for the other types.
+    // For now, .caseInsensitive does not seem to hurt?
+    default:
+      return .caseInsensitive
+    }
+  }
+}

PredicateKit/Primitive.swift

@@ -160,3 +160,10 @@ extension Optional: Comparable where Wrapped: Comparable {
     }
   }
 }
+
+@available(iOS 13.0, watchOS 6.0, tvOS 13.0, *)
+extension Optional: Identifiable where Wrapped: Identifiable {
+  public var id: Wrapped.ID? {
+    self?.id
+  }
+}

PredicateKitTests/CoreDataTests/NSFetchRequestBuilderTests.swift

@@ -109,6 +109,27 @@ final class NSFetchRequestBuilderTests: XCTestCase {
     XCTAssertEqual(comparison.comparisonPredicateModifier, .direct)
   }
 
+  @available(iOS 13.0, watchOS 6.0, tvOS 13.0, *)
+  func testEqualityWithOptionalIdentifiable() throws {
+    guard let identifiable = makeIdentifiable() else {
+      XCTFail("could not initialize IdentifiableData")
+      return
+    }
+
+    identifiable.id = "42"
+
+    let request = makeRequest(\Data.optionalIdentifiable == identifiable)
+    let builder = makeRequestBuilder()
+
+    let result: NSFetchRequest<Data> = builder.makeRequest(from: request)
+
+    let comparison = try XCTUnwrap(result.predicate as? NSComparisonPredicate)
+    XCTAssertEqual(comparison.leftExpression, NSExpression(forKeyPath: "optionalIdentifiable.id"))
+    XCTAssertEqual(comparison.rightExpression, NSExpression(forConstantValue: "42"))
+    XCTAssertEqual(comparison.predicateOperatorType, .equalTo)
+    XCTAssertEqual(comparison.comparisonPredicateModifier, .direct)
+  }
+
   func testArrayElementEqualPredicate() throws {
     let request = makeRequest((\Data.relationships).last(\.count) == 42)
     let builder = makeRequestBuilder()
@@ -1134,6 +1155,7 @@ private class Data: NSManagedObject {
   @NSManaged var optionalRelationship: Relationship?
   @NSManaged var optionalRelationships: [Relationship]?
   @NSManaged var identifiable: IdentifiableData
+  @NSManaged var optionalIdentifiable: IdentifiableData?
 }
 
 private class Relationship: NSManagedObject {

PredicateKitTests/PrimitiveTests.swift

@@ -158,4 +158,25 @@ final class PrimitiveTests: XCTestCase {
     XCTAssertFalse(nil < rhs)
     XCTAssertFalse(lhs < nil)
   }
+
+  func testDefaultComparisonOptions() {
+    XCTAssertEqual(UUID.defaultComparisonOptions, .none)
+    XCTAssertEqual(Bool.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Int.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Int8.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Int16.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Int32.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Int64.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(UInt.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(UInt8.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(UInt16.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(UInt32.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(UInt64.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Double.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Float.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(String.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Date.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(URL.defaultComparisonOptions, .caseInsensitive)
+    XCTAssertEqual(Data.defaultComparisonOptions, .caseInsensitive)
+  }
 }