Ignore hidden rows on submit

src/Altinn.App.Core/Features/Validation/ValidationAppSI.cs

@@ -1,4 +1,5 @@
 using Altinn.App.Core.Configuration;
+using Altinn.App.Core.Helpers;
 using Altinn.App.Core.Interface;
 using Altinn.App.Core.Internal.App;
 using Altinn.App.Core.Internal.AppModel;
@@ -230,8 +231,8 @@ public async Task<List<ValidationIssue>> ValidateDataElement(Instance instance,
                 {
                     var layoutSet = _appResourcesService.GetLayoutSetForTask(dataType.TaskId);
                     var evaluationState = await _layoutEvaluatorStateInitializer.Init(instance, data, layoutSet?.Id);
-                    // Remove hidden data before validation
-                    LayoutEvaluator.RemoveHiddenData(evaluationState);
+                    // Remove hidden data before validation, set rows to null to preserve indices
+                    LayoutEvaluator.RemoveHiddenData(evaluationState, RowRemovalOption.SetToNull);
                     // Evaluate expressions in layout and validate that all required data is included and that maxLength
                     // is respected on groups
                     var layoutErrors = LayoutEvaluator.RunLayoutValidationsForRequired(evaluationState, dataElement.Id);

src/Altinn.App.Core/Helpers/DataModel/DataModel.cs

@@ -207,7 +207,7 @@ private static bool IsPropertyWithJsonName(PropertyInfo propertyInfo, string key
     }
 
     /// <inheritdoc />
-    public void RemoveField(string key, bool deleteRows = false)
+    public void RemoveField(string key, RowRemovalOption rowRemovalOption)
     {
         var keys_split = key.Split('.');
         var keys = keys_split[0..^1];
@@ -242,16 +242,18 @@ public void RemoveField(string key, bool deleteRows = false)
                 throw new ArgumentException($"Tried to remove row {key}, ended in a non-list ({propertyValue?.GetType()})");
             }
 
-            if (deleteRows)
+            switch (rowRemovalOption)
             {
-                listValue.RemoveAt(lastGroupIndex.Value);
-            }
-            else
-            {
-
-                var genericType = listValue.GetType().GetGenericArguments().FirstOrDefault();
-                var nullValue = genericType?.IsValueType == true ? Activator.CreateInstance(genericType) : null;
-                listValue[lastGroupIndex.Value] = nullValue;
+                case RowRemovalOption.DeleteRow:
+                    listValue.RemoveAt(lastGroupIndex.Value);
+                    break;
+                case RowRemovalOption.SetToNull:
+                    var genericType = listValue.GetType().GetGenericArguments().FirstOrDefault();
+                    var nullValue = genericType?.IsValueType == true ? Activator.CreateInstance(genericType) : null;
+                    listValue[lastGroupIndex.Value] = nullValue;
+                    break;
+                case RowRemovalOption.Ignore:
+                    return;
             }
         }
         else

src/Altinn.App.Core/Helpers/IDataModel.cs

@@ -39,13 +39,34 @@ public interface IDataModelAccessor
     /// <summary>
     /// Remove a value from the wrapped datamodel
     /// </summary>
-    void RemoveField(string key, bool deleteRows = false);
+    void RemoveField(string key, RowRemovalOption rowRemovalOption);
 
     /// <summary>
     /// Verify that a Key is a valid lookup for the datamodel 
     /// </summary>
     bool VerifyKey(string key);
 }
 
+/// <summary>
+/// Option for how to handle row removal
+/// </summary>
+public enum RowRemovalOption
+{
+    /// <summary>
+    /// Remove the row from the data model
+    /// </summary>
+    DeleteRow,
+
+    /// <summary>
+    /// Set the row to null, used to preserve row indices
+    /// </summary>
+    SetToNull,
+
+    /// <summary>
+    /// Ignore row removal
+    /// </summary>
+    Ignore
+}
+
 
 

src/Altinn.App.Core/Implementation/DefaultTaskEvents.cs

@@ -257,10 +257,10 @@ private async Task RemoveHiddenData(Instance instance, Guid instanceGuid, List<D
 
                 if (_appSettings?.RemoveHiddenDataPreview == true)
                 {
-                    // Remove hidden data before validation
+                    // Remove hidden data before validation, ignore hidden rows. TODO: Determine how hidden rows should be handled going forward.
                     var layoutSet = _appResources.GetLayoutSetForTask(dataType.TaskId);
                     var evaluationState = await _layoutEvaluatorStateInitializer.Init(instance, data, layoutSet?.Id);
-                    LayoutEvaluator.RemoveHiddenData(evaluationState, true);
+                    LayoutEvaluator.RemoveHiddenData(evaluationState, RowRemovalOption.Ignore);
                 }
 
                 // save the updated data if there are changes

src/Altinn.App.Core/Internal/Expressions/LayoutEvaluator.cs

@@ -1,3 +1,4 @@
+using Altinn.App.Core.Helpers;
 using Altinn.App.Core.Models.Expressions;
 using Altinn.App.Core.Models.Layout.Components;
 using Altinn.App.Core.Models.Validation;
@@ -89,12 +90,12 @@ private static void HiddenFieldsForRemovalRecurs(LayoutEvaluatorState state, Has
     /// <summary>
     /// Remove fields that are only refrenced from hidden fields from the data object in the state.
     /// </summary>
-    public static void RemoveHiddenData(LayoutEvaluatorState state, bool deleteRows = false)
+    public static void RemoveHiddenData(LayoutEvaluatorState state, RowRemovalOption rowRemovalOption)
     {
         var fields = GetHiddenFieldsForRemoval(state);
         foreach (var field in fields)
         {
-            state.RemoveDataField(field, deleteRows);
+            state.RemoveDataField(field, rowRemovalOption);
         }
     }
 

src/Altinn.App.Core/Internal/Expressions/LayoutEvaluatorState.cs

@@ -180,9 +180,9 @@ public ComponentContext GetComponentContext(string pageName, string componentId,
     /// <summary>
     /// Set the value of a field to null.
     /// </summary>
-    public void RemoveDataField(string key, bool deleteRows = false)
+    public void RemoveDataField(string key, RowRemovalOption rowRemovalOption)
     {
-        _dataModel.RemoveField(key, deleteRows);
+        _dataModel.RemoveField(key, rowRemovalOption);
     }
 
     /// <summary>

test/Altinn.App.Core.Tests/Helpers/JsonDataModel.cs

@@ -143,7 +143,7 @@ public string AddIndicies(string key, ReadOnlySpan<int> indicies = default)
     }
 
     /// <inheritdoc />
-    public void RemoveField(string key, bool deleteRows = false)
+    public void RemoveField(string key, RowRemovalOption rowRemovalOption)
     {
         throw new NotImplementedException("Impossible to remove fields in a json model");
     }

test/Altinn.App.Core.Tests/LayoutExpressions/FullTests/Test2/RunTest2.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using System.Text.Json.Serialization;
 using System.Threading.Tasks;
+using Altinn.App.Core.Helpers;
 using Altinn.App.Core.Internal.Expressions;
 using Altinn.App.Core.Models.Validation;
 using FluentAssertions;
@@ -54,7 +55,7 @@ public async Task RemoveWholeGroup()
         data.Some.Data[0].Binding2.Should().Be(0); // binding is not nullable, but will be reset to zero
         data.Some.Data[1].Binding.Should().Be("binding");
         data.Some.Data[1].Binding2.Should().Be(2);
-        LayoutEvaluator.RemoveHiddenData(state);
+        LayoutEvaluator.RemoveHiddenData(state, RowRemovalOption.SetToNull);
 
         // Verify data was removed
         data.Some.Data[0].Binding.Should().BeNull();
@@ -111,4 +112,4 @@ public class Data
 
     [JsonPropertyName("binding3")]
     public string Binding3 { get; set; }
-}
+}

test/Altinn.App.Core.Tests/LayoutExpressions/FullTests/Test3/RunTest3.cs

@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using Altinn.App.Core.Helpers;
 using Altinn.App.Core.Internal.Expressions;
 using FluentAssertions;
 using Xunit;
@@ -61,7 +62,7 @@ public async Task RemoveRowDataFromGroup()
         data.Some.Data[2].Binding.Should().Be("hideRow");
         data.Some.Data[2].Binding2.Should().Be(3);
         data.Some.Data[2].Binding3.Should().Be("text");
-        LayoutEvaluator.RemoveHiddenData(state);
+        LayoutEvaluator.RemoveHiddenData(state, RowRemovalOption.SetToNull);
 
         // Verify row not deleted but fields null
         data.Some.Data.Should().HaveCount(3);
@@ -71,7 +72,7 @@ public async Task RemoveRowDataFromGroup()
         data.Some.Data[1].Binding2.Should().Be(2);
         data.Some.Data[2].Should().BeNull();
     }
-    
+
     [Fact]
     public async Task RemoveRowFromGroup()
     {
@@ -118,9 +119,9 @@ public async Task RemoveRowFromGroup()
         data.Some.Data[2].Binding.Should().Be("hideRow");
         data.Some.Data[2].Binding2.Should().Be(3);
         data.Some.Data[2].Binding3.Should().Be("text");
-        
+
         // Verify rows deleted
-        LayoutEvaluator.RemoveHiddenData(state, true);
+        LayoutEvaluator.RemoveHiddenData(state, RowRemovalOption.DeleteRow);
         data.Some.Data.Should().HaveCount(2);
         data.Some.Data[0].Binding.Should().BeNull();
         data.Some.Data[0].Binding2.Should().Be(0); // binding is not nullable, but will be reset to zero
@@ -154,4 +155,4 @@ public class Data
 
     [JsonPropertyName("binding3")]
     public string Binding3 { get; set; }
-}
+}

test/Altinn.App.Core.Tests/LayoutExpressions/TestDataModel.cs

@@ -226,22 +226,22 @@ public void TestRemoveFields()
         };
         IDataModelAccessor modelHelper = new DataModel(model);
         model.Id.Should().Be(2);
-        modelHelper.RemoveField("id");
+        modelHelper.RemoveField("id", RowRemovalOption.SetToNull);
         model.Id.Should().Be(default);
 
         model.Name.Value.Should().Be("Ivar");
-        modelHelper.RemoveField("name");
+        modelHelper.RemoveField("name", RowRemovalOption.SetToNull);
         model.Name.Should().BeNull();
 
         model.Friends.First().Name!.Value.Should().Be("Første venn");
-        modelHelper.RemoveField("friends[0].name.value");
+        modelHelper.RemoveField("friends[0].name.value", RowRemovalOption.SetToNull);
         model.Friends.First().Name!.Value.Should().BeNull();
-        modelHelper.RemoveField("friends[0].name");
+        modelHelper.RemoveField("friends[0].name", RowRemovalOption.SetToNull);
         model.Friends.First().Name.Should().BeNull();
         model.Friends.First().Age.Should().Be(1235);
 
         model.Friends.First().Friends!.First().Age.Should().Be(233);
-        modelHelper.RemoveField("friends[0].friends");
+        modelHelper.RemoveField("friends[0].friends", RowRemovalOption.SetToNull);
         model.Friends.First().Friends.Should().BeNull();
     }
 
@@ -338,12 +338,12 @@ public void TestRemoveRows()
         var model1 = System.Text.Json.JsonSerializer.Deserialize<Model>(serializedModel)!;
         IDataModelAccessor modelHelper1 = new DataModel(model1);
 
-        modelHelper1.RemoveField("friends[0].friends[0]");
+        modelHelper1.RemoveField("friends[0].friends[0]", RowRemovalOption.SetToNull);
         model1.Friends![0].Friends![0].Should().BeNull();
         model1.Friends![0].Friends!.Count.Should().Be(3);
         model1.Friends[0].Friends![1].Name!.Value.Should().Be("Første venn sin andre venn");
 
-        modelHelper1.RemoveField("friends[1]");
+        modelHelper1.RemoveField("friends[1]", RowRemovalOption.SetToNull);
         model1.Friends[1].Should().BeNull();
         model1.Friends.Count.Should().Be(3);
         model1.Friends[2].Name!.Value.Should().Be("Tredje venn");
@@ -352,11 +352,11 @@ public void TestRemoveRows()
         var model2 = System.Text.Json.JsonSerializer.Deserialize<Model>(serializedModel)!;
         IDataModelAccessor modelHelper2 = new DataModel(model2);
 
-        modelHelper2.RemoveField("friends[0].friends[0]", true);
+        modelHelper2.RemoveField("friends[0].friends[0]", RowRemovalOption.DeleteRow);
         model2.Friends![0].Friends!.Count.Should().Be(2);
         model2.Friends[0].Friends![0].Name!.Value.Should().Be("Første venn sin andre venn");
 
-        modelHelper2.RemoveField("friends[1]", true);
+        modelHelper2.RemoveField("friends[1]", RowRemovalOption.DeleteRow);
         model2.Friends.Count.Should().Be(2);
         model2.Friends[1].Name!.Value.Should().Be("Tredje venn");
     }
@@ -454,16 +454,16 @@ public void RemoveField_WhenValueDoesNotExist_DoNothing()
         var modelHelper = new DataModel(new Model());
 
         // real fields works, no error
-        modelHelper.RemoveField("id");
+        modelHelper.RemoveField("id", RowRemovalOption.SetToNull);
 
         // non-existant-fields works, no error
-        modelHelper.RemoveField("doesNotExist");
+        modelHelper.RemoveField("doesNotExist", RowRemovalOption.SetToNull);
 
         // non-existant-fields in subfield works, no error
-        modelHelper.RemoveField("friends.doesNotExist");
+        modelHelper.RemoveField("friends.doesNotExist", RowRemovalOption.SetToNull);
 
         // non-existant-fields in subfield works, no error
-        modelHelper.RemoveField("friends[0].doesNotExist");
+        modelHelper.RemoveField("friends[0].doesNotExist", RowRemovalOption.SetToNull);
     }
 }