update

src/Grid/Column/HasDisplayers.php

@@ -4,6 +4,7 @@ namespace Dcat\Admin\Grid\Column;
 
 use Dcat\Admin\Grid\Column;
 use Dcat\Admin\Grid\Displayers\AbstractDisplayer;
+use Dcat\Admin\Support\Helper;
 use Illuminate\Contracts\Support\Arrayable;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Collection;
@@ -182,7 +183,7 @@ trait HasDisplayers
     }
 
     /**
-     * Limit the number of characters in a string.
+     * Limit the number of characters in a string, or the number of element in a array.
      *
      * @param int    $limit
      * @param string $end
@@ -192,6 +193,20 @@ trait HasDisplayers
     public function limit($limit = 100, $end = '...')
     {
         return $this->display(function ($value) use ($limit, $end) {
+            if ($value !== null && ! is_scalar($value)) {
+                $value = Helper::array($value);
+
+                if (count($value) <= $limit) {
+                    return $value;
+                }
+
+                $value = array_slice($value, 0, $limit);
+
+                array_push($value, $end);
+
+                return $value;
+            }
+
             if (mb_strlen($value, 'UTF-8') <= $limit) {
                 return $value;
             }