Home php教程 php手册 TP3.2.3教你如何解决mongo无法连接的问题

TP3.2.3教你如何解决mongo无法连接的问题

Jun 07, 2016 am 11:36 AM

由于业务需要, 最近我也开始学习了mongo, 公司用的3.2.3版本, 遇到最大的问题就是Call to a member function selectCollection() on a non-object, 其实看过错误提示就会很明白, 这个原因是由于缺少数据库名引起的.
知道了错误原因就很容易解决这个问题了.
首先, 我的数据库配置文件是这样写的:return array(<br>         'DB_TYPE' => 'mysql',<br>         'DB_HOST' => 'localhost',<br>         'DB_NAME' => 'xxx',<br>         'DB_USER' => 'xxx',<br>         'DB_PWD' => 'xxx',<br>         'DB_PORT' => '3306',<br>         'DB_PREFIX' => '',<br>         //密钥<br>         "AUTHCODE" => 'xxx',<br>         "COOKIE_PREFIX" => 'xxx',<br>     'MONGO'=>array(<br>         'DB_TYPE'   => 'mongo', // 数据库类型<br>         'DB_HOST'   => 'localhost', // 服务器地址<br>         'DB_NAME'   => 'xxx', // 数据库名<br>         'DB_USER'   => 'xxx', // 用户名<br>         'DB_PWD'    => 'xxx', // 密码<br>         'DB_PORT'   => '27017', // 端口<br>         'DB_PREFIX' => 'xx'<br>     )<br> );默认使用mysql的链接方式, 只有在某些页面才会用到mongo.
so 在使用的时候是这样: M("Product","","MONGO");大家可以去了解一下这个M方法的源码和具体的参数是干什么用的, 这里有个小问题, 就是中间的参数是表前缀, 但是我为空了系统竟然使用mysql的表前缀,并且我mongo的配置里面也写了表前缀是为空的,都不行, 有知道的大神说一下,小弟感激不尽.
然后就是修改Library\Think\Db\Driver\Mongo.class.php这个文件:
其中switchCollection函数里面有一段代码是这样的:if(!empty($db)) { // 传人Db则切换数据库<br>      // 当前MongoDb对象<br>      $this->_dbName  =  $db;<br>      $this->_mongo = $this->_linkID->selectDb($db);<br> }我们在其后面加个else:if(!empty($db)) { // 传人Db则切换数据库<br>      // 当前MongoDb对象<br>      $this->_dbName  =  $db;<br>      $this->_mongo = $this->_linkID->selectDb($db);<br> }else{
       $config = C('MONGO');
       $db = $config['DB_NAME'];
       $this->_dbName  =  $db;
       $this->_mongo = $this->_linkID->selectDb($db);
 }
开头我也说了, 造成这个错误的原因就是缺少数据库名, so 我们可以加上去, 这样就解决了.

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