如何在 MongoDB C++ 中使用 DBClientBase 类插入文档司机？

发布于 2024-12-26 00:44:10 字数 1022 浏览 0 评论 0原文

我没有使用 DBClientConnection 类，而是使用 DBClientBase 类。我能够成功连接到数据库，但无法插入文档。

这是我的代码的样子 -

DBClientBase *conn = NULL;
string err_msg;
ConnectionString cs = ConnectionString::parse(connString, err_msg);

if (!cs.isValid()) {
 throw "bad: " + err_msg;
}

try {
conn = cs.connect(err_msg);
} catch (DBException &e) {
 cout << "caught " << err_msg << endl;
return 1;
}

if (!conn){
   cout<<"Unable to connect to DB"<<endl;
   return 1;
}

BSONObjBuilder b;
b.append("name", "Joe");
b.append("age", 33);
BSONObj p = b.obj();

conn.insert("db.coll",p,0);

编译器给出错误 request for member 'insert' in 'conn', which is of non-class type 'mongo::DBClientBase*'

是否有示例如何使用DBClientBase类插入文档？

另外，我似乎找不到 virtual void insert (const string &ns, BSONObj obj, int flags=0) 中标志的用途，如提到的此处

原文

Instead of using DBClientConnection class, I am using DBClientBase class. I am successfully able to connect to the DB but not able to insert a document.

Here is how my code looks like-

DBClientBase *conn = NULL;
string err_msg;
ConnectionString cs = ConnectionString::parse(connString, err_msg);

if (!cs.isValid()) {
 throw "bad: " + err_msg;
}

try {
conn = cs.connect(err_msg);
} catch (DBException &e) {
 cout << "caught " << err_msg << endl;
return 1;
}

if (!conn){
   cout<<"Unable to connect to DB"<<endl;
   return 1;
}

BSONObjBuilder b;
b.append("name", "Joe");
b.append("age", 33);
BSONObj p = b.obj();

conn.insert("db.coll",p,0);

the compiler gives error request for member ‘insert’ in ‘conn’, which is of non-class type ‘mongo::DBClientBase*’

Is there an example somewhere on how to use DBClientBase class to insert documents?

Also, I cannot seem to find what is the use of flags in virtual void insert (const string &ns, BSONObj obj, int flags=0) as mentioned here

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