update

@@ -28,9 +28,20 @@ class ProductController extends BaseController
         if(!empty($this->param['search'])){
             $map[] = ['title', 'like', "%{$this->param['search']}%"];
         }
+        if(!empty($this->param['created_at'][0])){
+            $this->param['created_at'][0] .= ' 00:00:00';
+        }
+        if(!empty($this->param['created_at'][1])){
+            $this->param['created_at'][1] .= ' 23:59:59';
+        }
+        if(empty($this->param['created_at'][0]) && !empty($this->param['created_at'][1])){
+            $map[] = ['created_at', '>=', $this->param['created_at'][0]];
+        }
+        if(!empty($this->param['created_at'][0]) && empty($this->param['created_at'][1])){
+            $map[] = ['created_at', '<=', $this->param['created_at']];
+        }
         if(!empty($this->param['created_at'][0]) && !empty($this->param['created_at'][1])){
-            $map[] = ['created_at', '>=', $this->param['created_at'][0] . ' 00:00:00'];
-            $map[] = ['created_at', '<=', $this->param['created_at'][1] . ' 59:59:59'];
+            $map[] = ['created_at', 'between', [$this->param['created_at']]];
         }
         if(!empty($this->param['category_id'])){
             $ids = CategoryRelated::where('cate_id', $this->param['category_id'])->pluck('product_id')->toArray();