groue · groue · Jul 21, 2024 · Jul 20, 2024
diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo.xcodeproj/project.pbxproj b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo.xcodeproj/project.pbxproj
@@ -354,6 +354,7 @@
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = GRDBAsyncDemoTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -373,6 +374,7 @@
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = GRDBAsyncDemoTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -512,7 +514,7 @@
 				DEVELOPMENT_TEAM = "";
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = GRDBAsyncDemo/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -534,7 +536,7 @@
 				DEVELOPMENT_TEAM = "";
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = GRDBAsyncDemo/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",

diff --git a/...yncDemo/GRDBAsyncDemo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/...yncDemo/GRDBAsyncDemo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -5,8 +5,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/groue/GRDBQuery",
       "state" : {
-        "revision" : "aefc0d7e7a64e841da33e1c8be7429da1bd9b5d6",
-        "version" : "0.6.0"
+        "revision" : "a6c46dd38ecf11a5c37732870dc03a384d582fba",
+        "version" : "0.9.0"
       }
     }
   ],

diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/GRDBAsyncDemoApp.swift b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/GRDBAsyncDemoApp.swift
@@ -5,17 +5,12 @@ import SwiftUI
 struct GRDBAsyncDemoApp: App {
     var body: some Scene {
         WindowGroup {
-            AppView().environment(\.appDatabase, .shared)
+            AppView().appDatabase(.shared)
         }
     }
 }
 
 // MARK: - Give SwiftUI access to the database
-//
-// Define a new environment key that grants access to an AppDatabase.
-//
-// The technique is documented at
-// <https://developer.apple.com/documentation/swiftui/environmentkey>.
 
 private struct AppDatabaseKey: EnvironmentKey {
     static var defaultValue: AppDatabase { .empty() }
@@ -28,13 +23,10 @@ extension EnvironmentValues {
     }
 }
 
-// In this demo app, views observe the database with the @Query property
-// wrapper, defined in the GRDBQuery package. Its documentation recommends to
-// define a dedicated initializer for `appDatabase` access, so we comply:
-
-extension Query where Request.DatabaseContext == AppDatabase {
-    /// Convenience initializer for requests that feed from `AppDatabase`.
-    init(_ request: Request) {
-        self.init(request, in: \.appDatabase)
+extension View {
+    func appDatabase(_ appDatabase: AppDatabase) -> some View {
+        self
+            .environment(\.appDatabase, appDatabase)
+            .databaseContext(.readOnly { appDatabase.reader })
     }
 }
diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/PlayerRequest.swift b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/PlayerRequest.swift
@@ -1,4 +1,3 @@
-import Combine
 import GRDB
 import GRDBQuery
 
@@ -14,37 +13,18 @@ import GRDBQuery
 ///             List(players) { player in ... )
 ///         }
 ///     }
-struct PlayerRequest: Queryable {
+struct PlayerRequest: ValueObservationQueryable {
     enum Ordering {
         case byScore
         case byName
     }
 
-    /// The ordering used by the player request.
-    var ordering: Ordering
-
-    // MARK: - Queryable Implementation
-
     static var defaultValue: [Player] { [] }
 
-    func publisher(in appDatabase: AppDatabase) -> AnyPublisher<[Player], Error> {
-        // Build the publisher from the general-purpose read-only access
-        // granted by `appDatabase.reader`.
-        // Some apps will prefer to call a dedicated method of `appDatabase`.
-        ValueObservation
-            .tracking(fetchValue(_:))
-            .publisher(
-                in: appDatabase.reader,
-                // The `.immediate` scheduling feeds the view right on
-                // subscription, and avoids an undesired animation when the
-                // application starts.
-                scheduling: .immediate)
-            .eraseToAnyPublisher()
-    }
+    /// The ordering used by the player request.
+    var ordering: Ordering
 
-    // This method is not required by Queryable, but it makes it easier
-    // to test PlayerRequest.
-    func fetchValue(_ db: Database) throws -> [Player] {
+    func fetch(_ db: Database) throws -> [Player] {
         switch ordering {
         case .byScore:
             return try Player.all().orderedByScore().fetchAll(db)

diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/AppView.swift b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/AppView.swift
@@ -43,7 +43,7 @@ struct AppView: View {
                             stopEditing()
                         }))
                 .toolbar { toolbarContent }
-                .onChange(of: players) { players in
+                .onChange(of: players) {
                     if players.isEmpty {
                         stopEditing()
                     }
@@ -141,14 +141,14 @@ private struct ToggleOrderingButton: View {
     }
 }
 
-struct AppView_Previews: PreviewProvider {
-    static var previews: some View {
-        Group {
-            // Preview the default, empty database
-            AppView()
-            
-            // Preview a database of random players
-            AppView().environment(\.appDatabase, .random())
-        }
-    }
+// MARK: - Previews
+
+#Preview("Empty") {
+    // Preview the default, empty database
+    AppView()
+}
+
+#Preview("Populated") {
+    // Preview a database of random players
+    AppView().appDatabase(.random())
 }
diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/PlayerCreationView.swift b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/PlayerCreationView.swift
@@ -43,8 +43,8 @@ struct PlayerCreationView: View {
     }
 }
 
-struct PlayerCreationSheet_Previews: PreviewProvider {
-    static var previews: some View {
-        PlayerCreationView()
-    }
+// MARK: - Previews
+
+#Preview {
+    PlayerCreationView()
 }
diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/PlayerEditionView.swift b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/PlayerEditionView.swift
@@ -15,7 +15,7 @@ struct PlayerEditionView: View {
 
     var body: some View {
         PlayerFormView(form: $form)
-            .onChange(of: isPresented) { isPresented in
+            .onChange(of: isPresented) {
                 // Save when back button is pressed
                 if !isPresented {
                     Task {
@@ -30,11 +30,11 @@ struct PlayerEditionView: View {
     }
 }
 
-struct PlayerEditionView_Previews: PreviewProvider {
-    static var previews: some View {
-        NavigationView {
-            PlayerEditionView(player: Player.makeRandom())
-                .navigationBarTitle("Player Edition")
-        }
+// MARK: - Previews
+
+#Preview {
+    NavigationView {
+        PlayerEditionView(player: Player.makeRandom())
+            .navigationBarTitle("Player Edition")
     }
 }
diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/PlayerFormView.swift b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/PlayerFormView.swift
@@ -33,15 +33,16 @@ extension PlayerForm {
     }
 }
 
-struct PlayerFormView_Previews: PreviewProvider {
-    static var previews: some View {
-        Group {
-            PlayerFormView(form: .constant(PlayerForm(
-                name: "",
-                score: "")))
-            PlayerFormView(form: .constant(PlayerForm(
-                name: Player.randomName(),
-                score: "\(Player.randomScore())")))
-        }
-    }
+// MARK: - Previews
+
+#Preview("Empty") {
+    PlayerFormView(form: .constant(PlayerForm(
+        name: "",
+        score: "")))
+}
+
+#Preview("Prefilled") {
+    PlayerFormView(form: .constant(PlayerForm(
+        name: Player.randomName(),
+        score: "\(Player.randomScore())")))
 }
diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/PlayerList.swift b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemo/Views/PlayerList.swift
@@ -46,14 +46,14 @@ private struct PlayerRow: View {
     }
 }
 
-struct PlayerList_Previews: PreviewProvider {
-    static var previews: some View {
-        NavigationView {
-            PlayerList(players: [
-                Player(id: 1, name: "Arthur", score: 100),
-                Player(id: 2, name: "Barbara", score: 1000),
-            ])
-                .navigationTitle("Preview")
-        }
+// MARK: - Previews
+
+#Preview {
+    NavigationView {
+        PlayerList(players: [
+            Player(id: 1, name: "Arthur", score: 100),
+            Player(id: 2, name: "Barbara", score: 1000),
+        ])
+        .navigationTitle("Preview")
     }
 }
diff --git a/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemoTests/PlayerRequestTests.swift b/Documentation/DemoApps/GRDBAsyncDemo/GRDBAsyncDemoTests/PlayerRequestTests.swift
@@ -16,7 +16,7 @@ class PlayerRequestTests: XCTestCase {
 
         // When we fetch players ordered by name
         let playerRequest = PlayerRequest(ordering: .byName)
-        let players = try dbQueue.read(playerRequest.fetchValue)
+        let players = try dbQueue.read(playerRequest.fetch)
 
         // Then the players are the two players ordered by name
         XCTAssertEqual(players, [player1, player2])
@@ -35,7 +35,7 @@ class PlayerRequestTests: XCTestCase {
 
         // When we fetch players ordered by score
         let playerRequest = PlayerRequest(ordering: .byScore)
-        let players = try dbQueue.read(playerRequest.fetchValue)
+        let players = try dbQueue.read(playerRequest.fetch)
 
         // Then the players are the two players ordered by score descending
         XCTAssertEqual(players, [player2, player1])

diff --git a/Documentation/DemoApps/GRDBCombineDemo/GRDBCombineDemo.xcodeproj/project.pbxproj b/Documentation/DemoApps/GRDBCombineDemo/GRDBCombineDemo.xcodeproj/project.pbxproj
@@ -354,6 +354,7 @@
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = GRDBCombineDemoTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -373,6 +374,7 @@
 				BUNDLE_LOADER = "$(TEST_HOST)";
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = GRDBCombineDemoTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -512,6 +514,7 @@
 				DEVELOPMENT_TEAM = "";
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = GRDBCombineDemo/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -533,6 +536,7 @@
 				DEVELOPMENT_TEAM = "";
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = GRDBCombineDemo/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",

diff --git a/...eDemo/GRDBCombineDemo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/...eDemo/GRDBCombineDemo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -5,8 +5,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/groue/GRDBQuery",
       "state" : {
-        "revision" : "aefc0d7e7a64e841da33e1c8be7429da1bd9b5d6",
-        "version" : "0.6.0"
+        "revision" : "a6c46dd38ecf11a5c37732870dc03a384d582fba",
+        "version" : "0.9.0"
       }
     }
   ],

diff --git a/Documentation/DemoApps/GRDBCombineDemo/GRDBCombineDemo/GRDBCombineDemoApp.swift b/Documentation/DemoApps/GRDBCombineDemo/GRDBCombineDemo/GRDBCombineDemoApp.swift
@@ -5,17 +5,12 @@ import SwiftUI
 struct GRDBCombineDemoApp: App {
     var body: some Scene {
         WindowGroup {
-            AppView().environment(\.appDatabase, .shared)
+            AppView().appDatabase(.shared)
         }
     }
 }
 
 // MARK: - Give SwiftUI access to the database
-//
-// Define a new environment key that grants access to an AppDatabase.
-//
-// The technique is documented at
-// <https://developer.apple.com/documentation/swiftui/environmentkey>.
 
 private struct AppDatabaseKey: EnvironmentKey {
     static var defaultValue: AppDatabase { .empty() }
@@ -28,13 +23,10 @@ extension EnvironmentValues {
     }
 }
 
-// In this demo app, views observe the database with the @Query property
-// wrapper, defined in the GRDBQuery package. Its documentation recommends to
-// define a dedicated initializer for `appDatabase` access, so we comply:
-
-extension Query where Request.DatabaseContext == AppDatabase {
-    /// Convenience initializer for requests that feed from `AppDatabase`.
-    init(_ request: Request) {
-        self.init(request, in: \.appDatabase)
+extension View {
+    func appDatabase(_ appDatabase: AppDatabase) -> some View {
+        self
+            .environment(\.appDatabase, appDatabase)
+            .databaseContext(.readOnly { appDatabase.reader })
     }
 }