0
db.runCommand({"group" :{
"ns" : "keyword_logs",
"key" : "keyword",
"initial" : {"keyword" : {}},
"$reduce" : function (doc , prev) {
if(doc.keyword != null && prev.keyword != null &&(doc.keyword in prev.keyword)) {
prev.keyword[doc.keyword]++;
}
else {
prev.keyword[doc.keyword] = 1 ;
}
},
"condition" : {"domain" : 40}
}})
这是ERRORMSG为什么编程MongoDB中运行这段代码是错误
{
"errmsg" : "exception: JavaScript property (name) contains a null char which is not allowed in BSON. {}",
"code" : 16985,
"ok" : 0
}