Add fix action in Required attribute

Editor.Extras/Validators/RequiredValidator.cs

@@ -1,5 +1,7 @@
-using TriInspector.Validators;
+using JetBrains.Annotations;
+using TriInspector.Validators;
 using TriInspector;
+using TriInspector.Resolvers;
 
 [assembly: RegisterTriAttributeValidator(typeof(RequiredValidator), ApplyOnArrayElement = true)]
 
@@ -7,6 +9,18 @@ namespace TriInspector.Validators
 {
     public class RequiredValidator : TriAttributeValidator<RequiredAttribute>
     {
+        [CanBeNull] private ActionResolver _fixActionResolver;
+
+        public override TriExtensionInitializationResult Initialize(TriPropertyDefinition propertyDefinition)
+        {
+            if (Attribute.FixAction != null)
+            {
+                _fixActionResolver = ActionResolver.Resolve(propertyDefinition, Attribute.FixAction);
+            }
+
+            return TriExtensionInitializationResult.Ok;
+        }
+
         public override TriValidationResult Validate(TriProperty property)
         {
             if (property.FieldType == typeof(string))
@@ -15,7 +29,7 @@ namespace TriInspector.Validators
                 if (isNull)
                 {
                     var message = Attribute.Message ?? $"{GetName(property)} is required";
-                    return TriValidationResult.Error(message);
+                    return MakeError(message, property);
                 }
             }
             else if (typeof(UnityEngine.Object).IsAssignableFrom(property.FieldType))
@@ -24,7 +38,7 @@ namespace TriInspector.Validators
                 if (isNull)
                 {
                     var message = Attribute.Message ?? $"{GetName(property)} is required";
-                    return TriValidationResult.Error(message);
+                    return MakeError(message, property);
                 }
             }
             else
@@ -35,6 +49,23 @@ namespace TriInspector.Validators
             return TriValidationResult.Valid;
         }
 
+        private TriValidationResult MakeError(string error, TriProperty property)
+        {
+            var result = TriValidationResult.Error(error);
+
+            if (_fixActionResolver != null)
+            {
+                result = AddFix(result, property);
+            }
+
+            return result;
+        }
+
+        private TriValidationResult AddFix(TriValidationResult result, TriProperty property)
+        {
+            return result.WithFix(() => _fixActionResolver?.InvokeForAllTargets(property), Attribute.FixActionName);
+        }
+
         private static string GetName(TriProperty property)
         {
             var name = property.DisplayName;

Editor.Samples/Validators/Validators_RequiredSample.cs

@@ -1,8 +1,14 @@
-using TriInspector;
+using System.Linq;
+using TriInspector;
 using UnityEngine;
 
 public class Validators_RequiredSample : ScriptableObject
 {
-    [Required]
-    public Material mat;
+    [Required(FixAction = nameof(FixMaterial), FixActionName = "Find in Resources")]
+    public Material material;
+
+    private void FixMaterial()
+    {
+        material = Resources.FindObjectsOfTypeAll<Material>().FirstOrDefault();
+    }
 }

README.md

@@ -143,11 +143,19 @@ Tri Inspector has some builtin validators such as `missing reference` and `type
 
 #### Required
 
-![Required](https://user-images.githubusercontent.com/26966368/168233232-596535b4-bab8-462e-b5d8-7a1c090e5143.png)
+![Required](https://github.com/codewriter-packages/Tri-Inspector/assets/26966368/56a8d0ef-c88b-4b4b-8121-388b94d47841)
 
 ```csharp
 [Required]
-public Material mat;
+public Material material;
+
+[Required(FixAction = nameof(FixTarget), FixActionName = "Assign self")]
+public Transform target;
+
+private void FixTarget()
+{
+    target = GetComponent<Transform>();
+}
 ```
 
 #### ValidateInput

Runtime/Attributes/RequiredAttribute.cs

@@ -6,5 +6,8 @@ namespace TriInspector
     public class RequiredAttribute : Attribute
     {
         public string Message { get; set; }
+
+        public string FixAction { get; set; }
+        public string FixActionName { get; set; }
     }
 }

Runtime/TriValidationResult.cs

@@ -25,7 +25,7 @@ namespace TriInspector
 
         public TriValidationResult WithFix(Action action, string name = null)
         {
-            return new TriValidationResult(IsValid, Message, MessageType, action, new GUIContent(name));
+            return new TriValidationResult(IsValid, Message, MessageType, action, new GUIContent(name ?? "Fix"));
         }
 
         public static TriValidationResult Info(string error)