模型类增加attrCase属性 用于设置数据表的字段大小写 值和PDO的属性PDO::ATTR_CASE一致，该设置需要和数据库的params参数一起使用才有效

library/think/Model.php

@@ -32,6 +32,8 @@ class Model
     protected $name = '';
     // 数据库名称
     protected $dbName = '';
+    // 数据表字段大小写
+    protected $attrCase = \PDO::CASE_LOWER;
     //数据库配置
     protected $connection = [];
     // 数据表名（不包含表前缀）
@@ -96,6 +98,10 @@ class Model
             $this->dbName = $config['db_name'];
         }
 
+        if (isset($config['attr_case'])) {
+            $this->attrCase = $config['attr_case'];
+        }
+
         // 数据库初始化操作
         // 获取数据库操作对象
         // 当前模型有独立的数据库连接信息
@@ -1428,7 +1434,20 @@ class Model
         $guid   = md5($tableName);
         $result = Cache::get($guid);
         if (!$result) {
-            $info   = array_change_key_case($this->db->getFields($tableName));
+            $info = $this->db->getFields($tableName);
+            // 字段大小写转换
+            switch ($this->attrCase) {
+                case \PDO::CASE_LOWER:
+                    $info = array_change_key_case($info);
+                    break;
+                case \PDO::CASE_UPPER:
+                    $info = array_change_key_case($info, CASE_UPPER);
+                    break;
+                case \PDO::CASE_NATURAL:
+                default:
+                    // 不做转换
+            }
+
             $fields = array_keys($info);
             foreach ($info as $key => $val) {
                 // 记录字段类型

library/think/db/driver/Mysql.php

@@ -58,7 +58,6 @@ class Mysql extends Driver
         $info   = [];
         if ($result) {
             foreach ($result as $key => $val) {
-                $val                 = array_change_key_case($val);
                 $info[$val['field']] = [
                     'name'    => $val['field'],
                     'type'    => $val['type'],

library/think/db/driver/Oracle.php

@@ -111,7 +111,6 @@ class Oracle extends Driver
         $info            = [];
         if ($result) {
             foreach ($result as $key => $val) {
-                $val                       = array_change_key_case($val);
                 $info[$val['column_name']] = [
                     'name'    => $val['column_name'],
                     'type'    => $val['data_type'],

library/think/db/driver/Sqlite.php

@@ -43,7 +43,6 @@ class Sqlite extends Driver
         $info            = [];
         if ($result) {
             foreach ($result as $key => $val) {
-                $val                = array_change_key_case($val);
                 $info[$val['name']] = [
                     'name'    => $val['name'],
                     'type'    => $val['type'],

library/think/log/driver/Trace.php

@@ -14,7 +14,7 @@ use think\Config;
 use think\Debug;
 
 /**
- * 页面Trace调试 需要设置 'response_exit' => false 才能生效
+ * 页面Trace调试
  */
 class Trace
 {