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src/Validator/Types/ArrayProxy.php

@@ -15,8 +15,12 @@ class ArrayProxy extends TypesProxy
      */
     public function dispatch(object $form, string $field, mixed $value): bool
     {
-        if (is_null($value) && !$this->allowsNull) {
-            return false;
+        if (is_null($value)) {
+            if (!$this->allowsNull) {
+                return false;
+            }
+            $form->{$field} = [];
+            return true;
         }
         return $value == ($form->{$field} = $value);
     }

src/Validator/Types/BoolProxy.php

@@ -15,7 +15,11 @@ class BoolProxy extends TypesProxy
      */
     public function dispatch(object $form, string $field, mixed $value): bool
     {
-        if (is_null($value) && !$this->allowsNull) {
+        if (is_null($value)) {
+            if (!$this->allowsNull) {
+                return false;
+            }
+            $form->{$field} = false;
             return false;
         }
         // TODO: Implement dispatch() method.

src/Validator/Types/FloatProxy.php

@@ -14,7 +14,11 @@ class FloatProxy extends TypesProxy
      */
     public function dispatch(object $form, string $field, mixed $value): bool
     {
-        if (is_null($value) && !$this->allowsNull) {
+        if (is_null($value)) {
+            if (!$this->allowsNull) {
+                return false;
+            }
+            $form->{$field} = 0;
             return false;
         }
         return $value == ($form->{$field} = (float)$value);

src/Validator/Types/IntProxy.php

@@ -14,7 +14,11 @@ class IntProxy extends TypesProxy
      */
     public function dispatch(object $form, string $field, mixed $value): bool
     {
-        if (is_null($value) && !$this->allowsNull) {
+        if (is_null($value)) {
+            if (!$this->allowsNull) {
+                return false;
+            }
+            $form->{$field} = 0;
             return false;
         }
         return $value == ($form->{$field} = (int)$value);

src/Validator/Types/MixedProxy.php

@@ -19,9 +19,6 @@ class MixedProxy extends TypesProxy
     public function dispatch(object $form, string $field, mixed $value): bool
     {
         try {
-            if (is_null($value) && !$this->allowsNull) {
-                return false;
-            }
             return $value == ($form->{$field} = $value);
         } catch (\Throwable $throwable) {
             return false;

src/Validator/Types/StringProxy.php

@@ -15,7 +15,11 @@ class StringProxy extends TypesProxy
      */
     public function dispatch(object $form, string $field, mixed $value): bool
     {
-        if (is_null($value) && !$this->allowsNull) {
+        if (is_null($value)) {
+            if (!$this->allowsNull) {
+                return false;
+            }
+            $form->{$field} = '';
             return false;
         }
         return $value == ($form->{$field} = (string)$value);

src/Validator/Validator.php

@@ -120,18 +120,13 @@ class Validator
         foreach ($this->rules as $name => $rules) {
             /** @var array<array<TypesProxy,string>> $typeValidator */
             $typeValidator = array_pop($rules);
-            $key = $this->alias[$name];
-            if (!isset($params[$key])) {
-                if ($rules[0] instanceof RequiredValidatorFilter) {
+            if (!isset($params[$name])) {
+                if (!empty($rules) && $rules[0] instanceof RequiredValidatorFilter) {
                     return $this->addError('The request field ' . $name . ' is mandatory and indispensable');
                 }
-                if (!$typeValidator[0]->allowsNull) {
-                    return $this->addError('The request field ' . $name . ' parameter cannot be null');
-                }
-                $params[$key] = null;
             }
 
-            if (!call_user_func($typeValidator, $this->formData, $name, $params[$key])) {
+            if (!call_user_func($typeValidator, $this->formData, $name, $params[$name] ?? null)) {
                 return $this->addError('The parameter type used in the request field ' . $name . ' is incorrect');
             }