resolve some issues

Author: nahid

src/Clause.php

@@ -110,11 +110,11 @@ class Clause
      * @param array $props
      * @return $this
      */
-    protected function fresh($props = [])
+    public function fresh($props = [])
     {
         $properties = [
             '_data'  => [],
-            '_baseData' => [],
+            '_original' => [],
             '_select' => [],
             '_isProcessed' => false,
             '_node' => '',
@@ -145,9 +145,11 @@ protected function fresh($props = [])
      */
     public function collect($data)
     {
+        $this->reProcess();
+        $this->fresh();
+
         $this->_data = deep_copy($data);
         $this->_original = deep_copy($data);
-        $this->_isProcessed = false;
 
         return $this;
     }
@@ -453,9 +455,10 @@ protected function makeResult($data, $newInstance = false)
     protected function instanceWithValue($value, $meta = [])
     {
         $instance = new static();
+        $instance = $instance->collect($value);
         $instance->fresh($meta);
 
-        return $instance->collect($value);
+        return $instance;
     }
 
     /**

src/QueryEngine.php

@@ -197,8 +197,13 @@ public function valid()
     public function copy($fresh = false)
     {
         if ($fresh) {
-            $this->fresh();
+            $this->fresh([
+                '_data' => $this->_data,
+                '_original' => $this->_original,
+                '_traveler' => $this->_traveler,
+            ]);
         }
+
         return deep_copy($this);
     }
 
@@ -283,8 +288,6 @@ public function reset($data = null, $fresh = false)
 
         $this->collect($data);
 
-        $this->reProcess();
-
         return $this;
     }
 
@@ -844,7 +847,7 @@ public function keys()
     {
         $this->prepare();
 
-        return array_keys($this->_data);
+        return $this->makeResult(array_keys($this->_data));
     }
 
     /**