revert

Author: iamgergo

src/Fields/Relation.php

@@ -94,6 +94,11 @@ abstract class Relation extends Field implements Form
      */
     protected ?Closure $aggregateResolver = null;
 
+    /**
+     * Determine whether the relation values are aggregated.
+     */
+    protected bool $aggregated = false;
+
     /**
      * The option group resolver.
      */
@@ -380,15 +385,15 @@ public function resolveDisplay(Model $related): ?string
             $this->display($related->getKeyName());
         }
 
-        return call_user_func_array($this->displayResolver, [$related]);
+        return (string) call_user_func_array($this->displayResolver, [$related]);
     }
 
     /**
      * {@inheritdoc}
      */
     public function getValue(Model $model): mixed
     {
-        if (is_callable($this->aggregateResolver)) {
+        if ($this->aggregated) {
             return parent::getValue($model);
         }
 
@@ -410,7 +415,7 @@ public function resolveFormat(Request $request, Model $model): ?string
             $this->formatResolver = function (Request $request, Model $model): mixed {
                 $default = $this->getValue($model);
 
-                if (is_callable($this->aggregateResolver)) {
+                if ($this->aggregated) {
                     return (string) $default;
                 }
 
@@ -541,6 +546,8 @@ public function aggregate(string $fn = 'count', string $column = '*'): static
                 $column === '*' ? '' : sprintf('_%s', $column)
             ));
 
+            $this->aggregated = true;
+
             return $query->withAggregate($this->getRelationName(), $column, $fn);
         };
 

src/Root.php

@@ -27,7 +27,7 @@ class Root
      *
      * @var string
      */
-    public const string VERSION = '2.7.1';
+    public const string VERSION = '2.7.2';
 
     /**
      * The registered booting callbacks.