1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 [ SQL语句 ] : UPDATE `ud_article` SET `hits`=hits+1 WHERE ( id= )

FILE: D:\phpweb\udems_demo\ThinkPHP\Library\Think\Db\Driver.class.php 　LINE: 350

#0 D:\phpweb\udems_demo\ThinkPHP\Library\Think\Db\Driver.class.php(350): E('1064:You have a...')
#1 D:\phpweb\udems_demo\ThinkPHP\Library\Think\Db\Driver.class.php(237): Think\Db\Driver->error()
#2 D:\phpweb\udems_demo\ThinkPHP\Library\Think\Db\Driver.class.php(906): Think\Db\Driver->execute('UPDATE `ud_arti...', false)
#3 D:\phpweb\udems_demo\ThinkPHP\Library\Think\Model.class.php(451): Think\Db\Driver->update(Array, Array)
#4 D:\phpweb\udems_demo\ThinkPHP\Library\Think\Model.class.php(841): Think\Model->save(Array)
#5 D:\phpweb\udems_demo\ThinkPHP\Library\Think\Model.class.php(863): Think\Model->setField('hits', Array)
#6 D:\phpweb\udems_demo\Application\Pt\Action\EmptyAction.class.php(26) : eval()'d code(4): Think\Model->setInc('hits', 1)
#7 [internal function]: Pt\Action\EmptyAction->index()
#8 D:\phpweb\udems_demo\ThinkPHP\Library\Think\App.class.php(173): ReflectionMethod->invoke(Object(Pt\Action\EmptyAction))
#9 D:\phpweb\udems_demo\ThinkPHP\Library\Think\App.class.php(110): Think\App::invokeAction(Object(Pt\Action\EmptyAction), 'index')
#10 D:\phpweb\udems_demo\ThinkPHP\Library\Think\App.class.php(204): Think\App::exec()
#11 D:\phpweb\udems_demo\ThinkPHP\Library\Think\Think.class.php(120): Think\App::run()
#12 D:\phpweb\udems_demo\ThinkPHP\ThinkPHP.php(97): Think\Think::start()
#13 D:\phpweb\udems_demo\index.php(36): require('D:\phpweb\udems...')
#14 {main}