Merge pull request #2588 from PabloCamp0s/PabloCamp0s-patch-1

Fix morph relation support with multi level relations

Author: yajra

src/EloquentDataTable.php

@@ -92,7 +92,7 @@ protected function compileQuerySearch($query, $columnName, $keyword, $boolean =
             return parent::compileQuerySearch($query, $columnName, $keyword, $boolean);
         }
 
-        if ($this->query->getModel()->$relation() instanceof MorphTo) {
+        if ($this->isMorphRelation($relation)) {
             $query->{$boolean . 'WhereHasMorph'}($relation, '*', function (Builder $query) use ($column, $keyword) {
                 parent::compileQuerySearch($query, $column, $keyword, '');
             });
@@ -122,6 +122,24 @@ protected function resolveRelationColumn($column)
         return $this->joinEagerLoadedColumn($relation, $columnName);
     }
 
+    /**
+     * Check if a relation is a morphed one or not.
+     *
+     * @param  string $relation
+     * @return bool
+     */
+    protected function isMorphRelation($relation)
+    {
+        $isMorph = false;
+        if ($relation !== null && $relation !== '') {
+            $relationParts = explode('.', $relation);
+            $firstRelation = array_shift($relationParts);
+            $isMorph       = $this->query->getModel()->$firstRelation() instanceof MorphTo;
+        }
+
+        return $isMorph;
+    }
+
     /**
      * Check if a relation was not used on eager loading.
      *