fix database access pagination error

Author: tamedevelopers

src/Capsule/CommandHelper.php

@@ -35,9 +35,9 @@ class CommandHelper
      */
     public function __construct($conn = null)
     {
-        $instance = "Tamedevelopers\Database\DB";
-        if(class_exists($instance) && is_null($conn)){
-            $conn = $instance::connection();
+        $dbInstance = "\Tamedevelopers\Database\DB";
+        if(!is_null($conn) && $conn instanceof $dbInstance){
+            $conn = $dbInstance::connection();
         }
 
         $this->conn = $conn;

src/Collections/Traits/CollectionTrait.php

@@ -8,8 +8,6 @@
 use Traversable;
 use JsonSerializable;
 use Tamedevelopers\Support\Str;
-use Tamedevelopers\Database\Schema\Builder;
-use Tamedevelopers\Database\Schema\Pagination\Paginator;
 use Tamedevelopers\Support\Collections\CollectionMapper;
 
 
@@ -85,13 +83,16 @@ protected function isProxies()
      */
     protected function isBuilderOrPaginator($expression = null)
     {
+        $paginatorInstance  = '\Tamedevelopers\Database\Schema\Pagination\Paginator';
+        $builderInstance    = '\Tamedevelopers\Database\Schema\Builder';
+
         $this->builder = $expression;
-        if ($expression instanceof \Builder){
+        if ($expression instanceof $builderInstance){
             self::$isBuilder = true;
         } else{
             self::$isBuilder = false;
         }
-        if ($expression instanceof \Paginator){
+        if ($expression instanceof $paginatorInstance){
             $this->isPaginate = true;
         }
     }