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FIX: ISXB-1674 - Input actions asset not converted correctly when upgrading from 1.14.1 (Regression) #2244

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FIX: ISXB-1674 - Input actions asset not converted correctly when upgrading from 1.14.1 (Regression) #2244

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a260324
Update the parser for migration
AswinRajGopal Sep 25, 2025
00b37a5
Added a test to cover the package migration.
AswinRajGopal Oct 2, 2025
d637adf
Revert "Added a test to cover the package migration."
AswinRajGopal Oct 3, 2025
4e76813
Revert "Update the parser for migration"
AswinRajGopal Oct 3, 2025
a8ba533
The the processors are split by , instead of ; it was typo
AswinRajGopal Oct 3, 2025
ff05b1d
Robust handling of migration logic
AswinRajGopal Oct 6, 2025
829c4aa
Added test to cover the migration
AswinRajGopal Oct 6, 2025
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53 changes: 53 additions & 0 deletions Assets/Tests/InputSystem.Editor/CustomProcessorEnumTest.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -108,5 +108,58 @@ public IEnumerator ProcessorEnum_ShouldSerializeByValue_WhenSerializedToAsset()

yield return null;
}

[Test]
public void Migration_ShouldProduceValidActionAsset_WithEnumProcessorConverted()
{
var legacyJson = @"
{
""name"": ""InputSystem_Actions"",
""maps"": [
{
""name"": ""Player"",
""id"": ""df70fa95-8a34-4494-b137-73ab6b9c7d37"",
""actions"": [
{
""name"": ""Move"",
""type"": ""Value"",
""id"": ""351f2ccd-1f9f-44bf-9bec-d62ac5c5f408"",
""expectedControlType"": ""Vector2"",
""processors"": ""StickDeadzone,InvertVector2(invertX=false),Custom(SomeEnum=1)"",
""interactions"": """",
""initialStateCheck"": true
}
]
}
],
""controlSchemes"": [],
""version"": 0
}";

// Parse and migrate the legacy JSON
var asset = InputActionAsset.FromJson(legacyJson);

// Object is valid after migration
Assert.That(asset, Is.Not.Null, "Migration failed to produce a valid InputActionAsset.");

var map = asset.FindActionMap("Player");
Assert.That(map, Is.Not.Null, "Expected Player map to exist.");

var action = map.FindAction("Move");
Assert.That(action, Is.Not.Null, "Expected Move action to exist.");

var processors = action.processors;

// Verify processor order and that enum was converted properly
Assert.That(processors, Does.Contain("StickDeadzone"), "StickDeadzone processor missing.");
Assert.That(processors, Does.Contain("InvertVector2(invertX=false)"), "InvertVector2 missing.");
Assert.That(processors, Does.Contain("Custom(SomeEnum=20)"), "Custom(SomeEnum=1) should migrate to SomeEnum=20 (OptionB).");
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This test is not verifying that the processor string can be parsed properly, which is what we want... we could still have a ";" separating them and those asserts would most likely pass.

@ekcoh do you know how we could get access to the parsed list of processors so we could assert on that instead? I could only find InputControl.processors or InputActionState.processors, but I don't know how to go from an InputActionAsset to InputControl or InputActionState

It seems InputAction.ResolveBindings end up calling InputBindingResolver.AddActionMap which then calls InstantiateWithParameters and that leads to the parsing and creation of processors, but I am not sure how we could call that from a test and then retrieve the list of processors to assert on that.

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Good catch, since the API design of Input Actions is based on string you can put whatever into Processors. So this test needs to complemented with code resolving the actions and the only way to actually prove the processors is correctly parsed and applied I believe would be to enable the actions and do ReadValue on the action after being resolved. To drive that action you also likely need a fake device to drive it with e.g. 1.0 and then see that e.g. scale processor multiples by 10 or similar.

In CoreTests_Actions.cs there are various examples on how to achieve this, e.g. search for tests containing ReadValue.

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This would have been trivial if the string based API design was not a thing and instead actions had a list of actual processors on them.


// Verify To JSON
var toJson = asset.ToJson();
var reloaded = InputActionAsset.FromJson(toJson);
Assert.That(reloaded, Is.Not.Null, "Reloaded asset after migration is null.");
Assert.That(reloaded.FindAction("Player/Move"), Is.Not.Null, "Reloaded asset did not contain expected Move action.");
}
}
#endif
36 changes: 15 additions & 21 deletions Packages/com.unity.inputsystem/InputSystem/Actions/InputActionAsset.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -1027,43 +1027,37 @@ internal void MigrateJson(ref ReadFileJson parsedJson)
continue;

var list = NameAndParameters.ParseMultiple(raw).ToList();
var rebuilt = new List<string>(list.Count);
var converted = new List<NameAndParameters>(list.Count);
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I still do not see why this isn't moved to outer scope and reused over iterations instead of being allocated on every iteration? Am I missing something?

foreach (var nap in list)
{
var procType = InputSystem.TryGetProcessor(nap.name);
if (nap.parameters.Count == 0 || procType == null)
{
rebuilt.Add(nap.ToString());
converted.Add(nap);
continue;
}

var dict = nap.parameters.ToDictionary(p => p.name, p => p.value.ToString());
var anyChanged = false;
foreach (var field in procType.GetFields(BindingFlags.Public | BindingFlags.Instance).Where(f => f.FieldType.IsEnum))
var updatedParameters = new List<NamedValue>(nap.parameters.Count);
foreach (var param in nap.parameters)
{
if (dict.TryGetValue(field.Name, out var ordS) && int.TryParse(ordS, out var ord))
var updatedPar = param;
var fieldInfo = procType.GetField(param.name, BindingFlags.Public | BindingFlags.Instance);
if(fieldInfo != null && fieldInfo.FieldType.IsEnum)
{
var values = Enum.GetValues(field.FieldType).Cast<object>().ToArray();
if (ord >= 0 && ord < values.Length)
var index = param.value.ToInt32();
var values = Enum.GetValues(fieldInfo.FieldType);
if(index >= 0 && index < values.Length)
{
dict[field.Name] = Convert.ToInt32(values[ord]).ToString();
anyChanged = true;
var convertedValue = Convert.ToInt32(values.GetValue(index));
updatedPar = NamedValue.From(param.name, convertedValue);
}
}
updatedParameters.Add(updatedPar);
}

if (!anyChanged)
{
rebuilt.Add(nap.ToString());
}
else
{
var paramText = string.Join(",", dict.Select(kv => $"{kv.Key}={kv.Value}"));
rebuilt.Add($"{nap.name}({paramText})");
}
converted.Add(NameAndParameters.Create(nap.name, updatedParameters));
}

actionJson.processors = string.Join(";", rebuilt);
actionJson.processors = NameAndParameters.SerializeMultiple(converted);
mapJson.actions[ai] = actionJson;
}
parsedJson.maps[mi] = mapJson;
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6 changes: 1 addition & 5 deletions ...m.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/Views/NameAndParametersListView.cs
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Expand Up @@ -83,11 +83,7 @@ private void OnParametersChanged(ParameterListView listView, int index)

private static string ToSerializableString(IEnumerable<NameAndParameters> parametersForEachListItem)
{
if (parametersForEachListItem == null)
return string.Empty;

return string.Join(NamedValue.Separator,
parametersForEachListItem.Select(x => x.ToString()).ToArray());
return NameAndParameters.SerializeMultiple(parametersForEachListItem);
}

public override void RedrawUI(InputActionsEditorState state)
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18 changes: 18 additions & 0 deletions Packages/com.unity.inputsystem/InputSystem/Utilities/NameAndParameters.cs
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Expand Up @@ -27,6 +27,24 @@
return $"{name}({parameterString})";
}

internal static string SerializeMultiple(IEnumerable<NameAndParameters> list)
{
if(list == null)
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Is this null check needed? It looks like this is never called with null?

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@LeoUnity LeoUnity Oct 6, 2025 •
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I'm not sure, it was copied from the file above

private static string ToSerializableString(IEnumerable parametersForEachListItem)

It was moved here just to make sure we can reuse the logic on those 2 places. But I have no idea if it can ever be null on the original place or not.

return string.Empty;

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Added line #L33 was not covered by tests

return string.Join(NamedValue.Separator, list.Select(x => x.ToString()).ToArray());
}

internal static NameAndParameters Create(string name, IList<NamedValue> parameters)
{
var result = new NameAndParameters
{
name = name,
parameters = new ReadOnlyArray<NamedValue>(parameters.ToArray())
};
return result;
}

public static IEnumerable<NameAndParameters> ParseMultiple(string text)
{
List<NameAndParameters> list = null;
Expand Down