我司的點(diǎn)贊功能 mongodb結(jié)構(gòu)如下 { "_id" : ObjectId("5a38c409fcd12baa083d6869"), "uid" : "1090692", "username" : "vvvv", "image" : "style/default/commonImg/headgirl.gif", "time" : 1513669641, "content" : "12312321", "likelist" : { "1090339" : { "uid" : "1090339", "username" : "xxx", "image" : "group1/M00/00/D9/wKgAE1oTkTKAdTPNAAEQcPzKoDA20.jpeg", "time" : 1513676247 }, "1090542" : { "uid" : "1090542", "username" : "aaa", "image" : "group1/M00/00/D8/wKgADVoOVaaAd0SvAAA8Kg_PvWI97.jpeg", "time" : 1513676255 } } } php代碼如下 if (in_array($this->user['uid'],$keys)){ //如果已經(jīng)點(diǎn)贊 $data = $talk->update($info,array('$unset'=>array("likelist.$userid"=>1)),array('upsert'=>true)); }else{ //如果沒點(diǎn)贊 $data = $talk->update($info,array('$set'=>array("likelist.$userid"=>$userinfo)),array('upsert'=>true)); } 其中有一個(gè)問題就是當(dāng)我點(diǎn)贊后又取消點(diǎn)贊,likelist為空時(shí),再進(jìn)行點(diǎn)贊,就會(huì)報(bào)一個(gè)這個(gè)錯(cuò)誤 E11000 duplicate key error collection: Mdaxue.Talks index: _id_ dup key: { : ObjectId('5a38c409fcd12baa083d6869') } 雖然也有笨方法解決如果likelist為空 就刪除這個(gè)字段但是總覺得會(huì)有更好方法解決他 ps:有好一點(diǎn)的php操作mongodb的文檔嗎?到處翻博客,博客上寫的又不是很全 ,很蛋疼