Bootstrap the database with a nil SyncEngineDelegate in RemindersList previews so lists will appear. And do not seed sample data to preserve the SeedSampleData UI.

Author: jcmourey

Examples/Reminders/RemindersApp.swift

@@ -18,7 +18,7 @@ struct RemindersApp: App {
   init() {
     if context == .live {
       try! prepareDependencies {
-        try $0.bootstrapDatabase(syncEngineDelegate: syncEngineDelegate)
+        try $0.bootstrapDatabase(syncEngineDelegate: syncEngineDelegate, seedSampleData: false)
       }
     }
   }

Examples/Reminders/RemindersLists.swift

@@ -436,10 +436,12 @@ private struct ReminderGridCell: View {
 }
 
 #Preview {
-  let _ = try! prepareDependencies {
-    $0.defaultDatabase = try Reminders.appDatabase()
+  withErrorReporting {
+    try prepareDependencies {
+      try $0.bootstrapDatabase(seedSampleData: false)
+    }
   }
-  NavigationStack {
+  return NavigationStack {
     RemindersListsView(model: RemindersListsModel())
   }
 }

Examples/Reminders/Schema.swift

@@ -116,8 +116,8 @@ struct ReminderText: FTS5 {
 }
 
 extension DependencyValues {
-  mutating func bootstrapDatabase(syncEngineDelegate: (any SyncEngineDelegate)? = nil) throws {
-    defaultDatabase = try Reminders.appDatabase()
+  mutating func bootstrapDatabase(syncEngineDelegate: (any SyncEngineDelegate)? = nil, seedSampleData: Bool) throws {
+    defaultDatabase = try Reminders.appDatabase(seedSampleData: seedSampleData)
     defaultSyncEngine = try SyncEngine(
       for: defaultDatabase,
       tables: RemindersList.self,
@@ -130,23 +130,23 @@ extension DependencyValues {
   }
 }
 
-func appDatabase() throws -> any DatabaseWriter {
+func appDatabase(seedSampleData: Bool = true) throws -> any DatabaseWriter {
   @Dependency(\.context) var context
   var configuration = Configuration()
   configuration.foreignKeysEnabled = true
   configuration.prepareDatabase { db in
     try db.attachMetadatabase()
     db.add(function: $createDefaultRemindersList)
     db.add(function: $handleReminderStatusUpdate)
-    #if DEBUG
-      db.trace(options: .profile) {
-        if context == .live {
-          logger.debug("\($0.expandedDescription)")
-        } else {
-          print("\($0.expandedDescription)")
-        }
+#if DEBUG
+    db.trace(options: .profile) {
+      if context == .live {
+        logger.debug("\($0.expandedDescription)")
+      } else {
+        print("\($0.expandedDescription)")
       }
-    #endif
+    }
+#endif
   }
   let database = try SQLiteData.defaultDatabase(configuration: configuration)
   logger.debug(
@@ -156,9 +156,9 @@ func appDatabase() throws -> any DatabaseWriter {
     """
   )
   var migrator = DatabaseMigrator()
-  #if DEBUG
-    migrator.eraseDatabaseOnSchemaChange = true
-  #endif
+#if DEBUG
+  migrator.eraseDatabaseOnSchemaChange = true
+#endif
   migrator.registerMigration("Create initial tables") { db in
     let defaultListColor = Color.HexRepresentation(queryOutput: RemindersList.defaultColor).hexValue
     try #sql(
@@ -228,7 +228,7 @@ func appDatabase() throws -> any DatabaseWriter {
     )
     .execute(db)
   }
-
+  
   migrator.registerMigration("Create foreign key indexes") { db in
     try #sql(
       """
@@ -254,9 +254,9 @@ func appDatabase() throws -> any DatabaseWriter {
   }
 
   try migrator.migrate(database)
-
+  
   try database.write { db in
-
+    
     try RemindersList.createTemporaryTrigger(
       after: .insert { new in
         RemindersList
@@ -265,7 +265,7 @@ func appDatabase() throws -> any DatabaseWriter {
       }
     )
     .execute(db)
-
+    
     try Reminder.createTemporaryTrigger(
       after: .insert { new in
         Reminder
@@ -274,7 +274,7 @@ func appDatabase() throws -> any DatabaseWriter {
       }
     )
     .execute(db)
-
+    
     try RemindersList.createTemporaryTrigger(
       after: .delete { _ in
         Values($createDefaultRemindersList())
@@ -283,7 +283,7 @@ func appDatabase() throws -> any DatabaseWriter {
       }
     )
     .execute(db)
-
+    
     try Reminder.createTemporaryTrigger(
       after: .insert { new in
         ReminderText.insert {
@@ -297,7 +297,7 @@ func appDatabase() throws -> any DatabaseWriter {
       }
     )
     .execute(db)
-
+    
     try Reminder.createTemporaryTrigger(
       after: .update {
         ($0.title, $0.notes)
@@ -311,7 +311,7 @@ func appDatabase() throws -> any DatabaseWriter {
       }
     )
     .execute(db)
-
+    
     try Reminder.createTemporaryTrigger(
       after: .delete { old in
         ReminderText
@@ -320,36 +320,36 @@ func appDatabase() throws -> any DatabaseWriter {
       }
     )
     .execute(db)
-
+    
     func updateReminderTextTags(
       for reminderID: some QueryExpression<Reminder.ID>
     ) -> UpdateOf<ReminderText> {
       ReminderText
         .where { $0.rowid.eq(Reminder.find(reminderID).select(\.rowid)) }
         .update {
           $0.tags =
-            ReminderTag
+          ReminderTag
             .order(by: \.tagID)
             .where { $0.reminderID.eq(reminderID) }
             .join(Tag.all) { $0.tagID.eq($1.primaryKey) }
             .select { ("#" + $1.title).groupConcat(" ") ?? "" }
         }
     }
-
+    
     try ReminderTag.createTemporaryTrigger(
       after: .insert { new in
         updateReminderTextTags(for: new.reminderID)
       }
     )
     .execute(db)
-
+    
     try ReminderTag.createTemporaryTrigger(
       after: .delete { old in
         updateReminderTextTags(for: old.reminderID)
       }
     )
     .execute(db)
-
+    
     try Reminder.createTemporaryTrigger(
       after: .update {
         $0.status
@@ -360,12 +360,14 @@ func appDatabase() throws -> any DatabaseWriter {
       }
     )
     .execute(db)
-
-    if context != .live {
+    
+#if DEBUG
+    if seedSampleData {
       try db.seedSampleData()
     }
+#endif
   }
-
+  
   return database
 }
 

Examples/RemindersTests/Internal.swift

@@ -10,7 +10,7 @@ import Testing
   .dependency(\.continuousClock, ImmediateClock()),
   .dependency(\.date.now, Date(timeIntervalSince1970: 1_234_567_890)),
   .dependency(\.uuid, .incrementing),
-  .dependencies { try $0.bootstrapDatabase() },
+  .dependencies { try $0.bootstrapDatabase(seedSampleData: true) },
   .snapshots(record: .failed)
 )
 struct BaseTestSuite {}