[英]Can't get data from mongoDB
我创建了通过PHP代码从mongoDB获取数据的函数。 但这似乎效果不佳。
让我们看看我的代码
function updateperformancescore($timepf)
{
$mon = new Mongo('mongodb://127.0.0.1:27017');
$dbs = $mon->selectDB('bitdindatabase');
$col = $dbs->selectCollection('bd_performance_score');
$query2 = array("user_ID"=>"999");
echo "<br>query__".$query2["user_ID"];
$data2 = $col->find($query2,true);
echo "<br>count___".count($data2)."<br>";
echo "check is_object--".is_object($data2)."<br>";
//echo "--".$data2["user_ID"]."<br>";
error_reporting(E_ALL ^ E_NOTICE);
foreach ($data2 as $obj)
{
echo "aaaa";
$which = array("user_ID"=>$obj["user_ID"],"time"=>$obj["ps_avgtime"],"slug"=>$obj["lesson_slug"]);
echo json_encode($which);
}
和网页仅显示
查询_ 999计数 __1检查is_object--1
但是我在mongo中的数据是
{ "_id" : ObjectId("501e768eefbdb8637e2b00c8"), "user_ID" : 999, "lesson_slug" : 999, "ps_avgtime" : 999 }
{ "_id" : ObjectId("501e7698efbdb8637e2b00c9"), "user_ID" : 999, "lesson_slug" : 998, "ps_avgtime" : 888 }
{ "_id" : ObjectId("501e76a1efbdb8637e2b00ca"), "user_ID" : 999, "lesson_slug" : 997, "ps_avgtime" : 777 }
{ "_id" : ObjectId("501e76a9efbdb8637e2b00cb"), "user_ID" : 999, "lesson_slug" : 996, "ps_avgtime" : 77 }
{ "_id" : ObjectId("501e76b6efbdb8637e2b00cc"), "user_ID" : 999, "lesson_slug" : 995, "ps_avgtime" : 555 }
{ "_id" : ObjectId("501e76c0efbdb8637e2b00cd"), "user_ID" : 999, "lesson_slug" : 994, "ps_avgtime" : 444 }
{ "_id" : ObjectId("501e76caefbdb8637e2b00ce"), "user_ID" : 999, "lesson_slug" : 993, "ps_avgtime" : 333 }
{ "_id" : ObjectId("501e76d3efbdb8637e2b00cf"), "user_ID" : 999, "lesson_slug" : 992, "ps_avgtime" : 222 }
{ "_id" : ObjectId("501e76dcefbdb8637e2b00d0"), "user_ID" : 999, "lesson_slug" : 991, "ps_avgtime" : 111 }
{ "_id" : ObjectId("501e76e6efbdb8637e2b00d1"), "user_ID" : 999, "lesson_slug" : 990, "ps_avgtime" : 1 }
为什么不进入foreach? 这段代码有什么问题以及如何正确获取数据。 请帮助或指导我:)
编辑
我只是error_log并且它显示
致命错误:/var/www/web/sendanswer.php:92堆栈跟踪:#0 / var / www / web / sendanswer中未捕获的异常“ MongoException”,消息为“ MongoCursor对象尚未由其构造函数正确初始化”。 php(92):MongoCursor-> rewind()#1 /var/www/web/sendanswer.php(343):sendanswer-> updateperformancescore(4.4269230365753)#2 {main}下一个异常“ MongoException”,消息为“ MongoCursor对象”未在/var/www/web/sendanswer.php:92中由其构造函数正确初始化:堆栈跟踪:#0 /var/www/web/sendanswer.php(92):MongoCursor-> rewind()#1 / var / www / web / sendanswer.php(343):sendanswer-> updateperformancescore(4.4269230365753)#2 {main}放在第92行的/var/www/web/sendanswer.php中
这是什么意思 ??
编辑
这意味着“可能您的Mongo对象未连接到数据库服务器。”
我看到的是数据类型错误。
在数据库中,user_ID是整数,在PHP查询中,它是一个字符串。 尝试:
$query2 = array("user_ID"=> 999);
代替 :
$query2 = array("user_ID"=>"999");
PHP在数据类型上可能很容易,但是我不确定Mongodb及其PHP驱动程序。
您的find
语句中还有一个错误的参数。 删除true
因为它应该是字段数组,而不是bool
这段代码可以正常工作:
<?php
$mon = new Mongo('mongodb://127.0.0.1:27017');
$dbs = $mon->selectDB('my_db');
$col = $dbs->selectCollection('newColl');
$query2 = array("user_ID"=> 999);
echo "<br>query__".$query2["user_ID"];
$data2 = $col->find($query2);
error_reporting(E_ALL ^ E_NOTICE);
foreach ($data2 as $obj)
{
$which = array("user_ID"=>$obj["user_ID"],
"time"=>$obj["ps_avgtime"],
"slug"=>$obj["lesson_slug"]);
echo json_encode($which);
echo PHP_EOL ;
}
?>
输出:
[......]$ php testmongo.php
<br>query__999{"user_ID":999,"time":999,"slug":999}
{"user_ID":999,"time":999,"slug":999}
{"user_ID":999,"time":339,"slug":999}
{"user_ID":999,"time":339,"slug":5599}
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