From d76137382cf6cdd616d59e247d30751433d2e25a Mon Sep 17 00:00:00 2001
From: thinkphp <thinkphp@qq.com>
Date: Thu, 11 Aug 2016 16:28:40 +0800
Subject: [PATCH] =?UTF-8?q?=E6=94=B9=E8=BF=9BQuery=E7=B1=BB=E7=9A=84field?=
 =?UTF-8?q?=E6=96=B9=E6=B3=95?=
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---
 library/think/db/Query.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index dcf735b9..8dcfcfa0 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -747,9 +747,9 @@ class Query
         }
 
         if (isset($this->options['field'])) {
-            $field = $this->options['field'] + $field;
+            $field = array_merge($this->options['field'], $field);
         }
-        $this->options['field'] = $field;
+        $this->options['field'] = array_unique($field);
         return $this;
     }