ENH Call validate on form fields within form

src/Forms/Form.php

@@ -1262,17 +1262,26 @@ public function getLegend()
      */
     public function validationResult()
     {
+        $result = ValidationResult::create();
+
         // Automatically pass if there is no validator, or the clicked button is exempt
         // Note: Soft support here for validation with absent request handler
         $handler = $this->getRequestHandler();
         $action = $handler ? $handler->buttonClicked() : null;
-        $validator = $this->getValidator();
-        if (!$validator || $this->actionIsValidationExempt($action)) {
-            return ValidationResult::create();
+        if ($this->actionIsValidationExempt($action)) {
+            return $result;
+        }
+
+        // Invoke FormField validation
+        foreach ($this->Fields() as $field) {
+            $result->combineAnd($field->validate());
         }
 
         // Invoke validator
-        $result = $validator->validate();
+        $validator = $this->getValidator();
+        if ($validator) {
+            $result->combineAnd($validator->validate());
+        }
         $this->loadMessagesFrom($result);
         return $result;
     }

src/Forms/RequiredFields.php

@@ -86,12 +86,6 @@ public function php($data)
         $valid = true;
         $fields = $this->form->Fields();
 
-        foreach ($fields as $field) {
-            $result = $field->validate();
-            $valid = $result->isValid() && $valid;
-            $this->result->combineAnd($result);
-        }
-
         if (!$this->required) {
             return $valid;
         }