2

I've installed MongoDB on ubuntu 12.10, tested on the mongo shell and it works ok.

Then, i installed cxx-driver from http://dl.mongodb.org/dl/cxx-driver/

Here is a MongoDB client example that i'm trying to build:

#include <cstdlib>
#include <iostream>
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/client/dbclient.h"
#include "mongo/client/dbclientcursor.h"
#include <boost/shared_ptr.hpp>

using namespace mongo;

void run() {
  DBClientConnection c;
  c.connect("localhost");
boost::shared_ptr<DBClientCursor> cursor =
    c.query("test", BSONObj());
  while (cursor->more())
      std::cout << cursor->next().toString() << std::endl;
}

int main() {
  try {
    run();
    std::cout << "connected ok" << std::endl;
  } catch( const DBException &e ) {
    std::cout << "caught " << e.what() << std::endl;
  }
  return EXIT_SUCCESS;
}

But this fails with this error:

In file included from /home/lurscher/third_party/usr/local/include/mongo/bson/oid.h:22:0,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:25,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:29,
                 from test_mongo.cpp:3:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/misc.h: In member function ‘time_t mongo::Date_t::toTimeT() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/misc.h:96:42: error: ‘verify’ was not declared in this scope
In file included from /home/lurscher/third_party/usr/local/include/mongo/util/hex.h:22:0,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/oid.h:23,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:25,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:29,
                 from test_mongo.cpp:3:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h: In member function ‘void mongo::StringBuilderImpl<Allocator>::appendDoubleNice(double)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:302:28: error: there are no arguments to ‘verify’ that depend on a template parameter, so a declaration of ‘verify’ must be available [-fpermissive]
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:302:28: note: (if you use ‘-fpermissive’, G++ will accept your code, but allowing the use of an undeclared name is deprecated)
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:303:33: error: there are no arguments to ‘verify’ that depend on a template parameter, so a declaration of ‘verify’ must be available [-fpermissive]
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h: In member function ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::SBNUM(T, int, const char*)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:336:28: error: there are no arguments to ‘verify’ that depend on a template parameter, so a declaration of ‘verify’ must be available [-fpermissive]
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:337:33: error: there are no arguments to ‘verify’ that depend on a template parameter, so a declaration of ‘verify’ must be available [-fpermissive]
In file included from /home/lurscher/third_party/usr/local/include/mongo/bson/oid.h:23:0,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:25,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:29,
                 from test_mongo.cpp:3:
/home/lurscher/third_party/usr/local/include/mongo/util/hex.h: In function ‘int mongo::fromHex(char)’:
/home/lurscher/third_party/usr/local/include/mongo/util/hex.h:33:23: error: ‘verify’ was not declared in this scope
In file included from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:29:0,
                 from test_mongo.cpp:3:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘const char* mongo::BSONElement::codeWScopeCode() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:265:70: error: ‘massert’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘int mongo::BSONElement::codeWScopeCodeLen() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:272:70: error: ‘massert’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘const char* mongo::BSONElement::binData(int&) const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:309:39: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘mongo::BinDataType mongo::BSONElement::binDataType() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:328:39: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘const char* mongo::BSONElement::regex() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:335:35: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘const char* mongo::BSONElement::dbrefNS() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:409:63: error: ‘uassert’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘const mongo::OID& mongo::BSONElement::dbrefOID() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:414:63: error: ‘uassert’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In constructor ‘mongo::BSONElement::BSONElement(const char*, int)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:439:72: error: ‘uassert’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘const mongo::BSONElement& mongo::BSONElement::chk(bool) const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:477:83: error: ‘massert’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h: In member function ‘int mongo::BSONElement::canonicalType() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:522:21: error: ‘verify’ was not declared in this scope
In file included from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:30:0,
                 from test_mongo.cpp:3:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobj.h: In member function ‘void mongo::BSONObj::appendSelfToBufBuilder(mongo::BufBuilder&) const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobj.h:456:31: error: ‘verify’ was not declared in this scope
In file included from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:31:0,
                 from test_mongo.cpp:3:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonmisc.h: At global scope:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonmisc.h:173:9: error: ‘auto_ptr’ in namespace ‘std’ does not name a type
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonmisc.h: In member function ‘bool mongo::BSONObjBuilderValueStream::haveSubobj() const’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonmisc.h:171:42: error: ‘_subobj’ was not declared in this scope
In file included from test_mongo.cpp:3:0:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h: In member function ‘virtual mongo::BSONObjBuilder& mongo::BSONObjBuilder::append(const mongo::BSONElement&)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:124:30: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h: In member function ‘virtual mongo::BSONObjBuilder& mongo::BSONObjBuilder::appendAs(const mongo::BSONElement&, const mongo::StringData&)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:131:30: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h: In member function ‘mongo::BSONObjBuilder& mongo::BSONObjBuilder::appendObject(const mongo::StringData&, const char*, int)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:148:29: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h: In member function ‘virtual mongo::BSONObj mongo::BSONObjBuilder::obj()’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:554:65: error: ‘massert’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h: In member function ‘char* mongo::BSONObjBuilder::decouple(int&)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:589:23: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h: In member function ‘mongo::Labeler mongo::BSONObjBuilder::operator<<(const mongo::Labeler::Label&)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:629:74: error: ‘massert’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h: In member function ‘void mongo::BSONArrayBuilder::fill(int)’:
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:836:102: error: ‘uassert’ was not declared in this scope
In file included from /home/lurscher/third_party/usr/local/include/mongo/db/jsobj.h:41:0,
                 from /home/lurscher/third_party/usr/local/include/mongo/client/authentication_table.h:23,
                 from /home/lurscher/third_party/usr/local/include/mongo/client/dbclientinterface.h:26,
                 from /home/lurscher/third_party/usr/local/include/mongo/client/connpool.h:23,
                 from /home/lurscher/third_party/usr/local/include/mongo/client/dbclient.h:32,
                 from test_mongo.cpp:4:
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h: In member function ‘void mongo::BSONObjBuilderValueStream::endField(const char*)’:
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h:359:9: error: ‘_subobj’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h: In member function ‘mongo::BSONObjBuilder* mongo::BSONObjBuilderValueStream::subobj()’:
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h:365:13: error: ‘_subobj’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h:366:16: error: ‘_subobj’ was not declared in this scope
test_mongo.cpp: In function ‘void run()’:
test_mongo.cpp:15:28: error: conversion from ‘std::auto_ptr<mongo::DBClientCursor>’ to non-scalar type ‘boost::shared_ptr<mongo::DBClientCursor>’ requested
In file included from /home/lurscher/third_party/usr/local/include/mongo/util/hex.h:22:0,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/oid.h:23,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:25,
                 from /home/lurscher/third_party/usr/local/include/mongo/bson/bsonobjbuilder.h:29,
                 from test_mongo.cpp:3:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h: In member function ‘void mongo::StringBuilderImpl<Allocator>::appendDoubleNice(double) [with Allocator = mongo::TrivialAllocator]’:
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h:702:42:   instantiated from here
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:302:13: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h: In member function ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::SBNUM(T, int, const char*) [with T = int, Allocator = mongo::TrivialAllocator, mongo::StringBuilderImpl<Allocator> = mongo::StringBuilderImpl<mongo::TrivialAllocator>]’:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:272:53:   instantiated from ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::operator<<(int) [with Allocator = mongo::TrivialAllocator, mongo::StringBuilderImpl<Allocator> = mongo::StringBuilderImpl<mongo::TrivialAllocator>]’
/home/lurscher/third_party/usr/local/include/mongo/bson/bsonelement.h:469:64:   instantiated from here
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:336:13: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h: In member function ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::SBNUM(T, int, const char*) [with T = unsigned int, Allocator = mongo::TrivialAllocator, mongo::StringBuilderImpl<Allocator> = mongo::StringBuilderImpl<mongo::TrivialAllocator>]’:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:275:53:   instantiated from ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::operator<<(unsigned int) [with Allocator = mongo::TrivialAllocator, mongo::StringBuilderImpl<Allocator> = mongo::StringBuilderImpl<mongo::TrivialAllocator>]’
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h:493:66:   instantiated from here
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:336:13: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h: In member function ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::SBNUM(T, int, const char*) [with T = long long int, Allocator = mongo::TrivialAllocator, mongo::StringBuilderImpl<Allocator> = mongo::StringBuilderImpl<mongo::TrivialAllocator>]’:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:284:55:   instantiated from ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::operator<<(long long int) [with Allocator = mongo::TrivialAllocator, mongo::StringBuilderImpl<Allocator> = mongo::StringBuilderImpl<mongo::TrivialAllocator>]’
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h:693:50:   instantiated from here
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:336:13: error: ‘verify’ was not declared in this scope
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h: In member function ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::SBNUM(T, int, const char*) [with T = long long unsigned int, Allocator = mongo::TrivialAllocator, mongo::StringBuilderImpl<Allocator> = mongo::StringBuilderImpl<mongo::TrivialAllocator>]’:
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:287:55:   instantiated from ‘mongo::StringBuilderImpl<Allocator>& mongo::StringBuilderImpl<Allocator>::operator<<(long long unsigned int) [with Allocator = mongo::TrivialAllocator, mongo::StringBuilderImpl<Allocator> = mongo::StringBuilderImpl<mongo::TrivialAllocator>]’
/home/lurscher/third_party/usr/local/include/mongo/db/../bson/bson-inl.h:776:48:   instantiated from here
/home/lurscher/third_party/usr/local/include/mongo/bson/util/builder.h:336:13: error: ‘verify’ was not declared in this scope
lurscher
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2 Answers2

2

Try this...

#include <cstdlib>
#include <iostream>
#include "mongo/client/dbclient.h"

using namespace mongo;

void run() {
  mongo::DBClientConnection c;
  c.connect("localhost");

  auto_ptr<DBClientCursor> cursor = c.query("test.test", BSONObj());
  while (cursor->more())
      std::cout << cursor->next().toString() << std::endl;
}

int main() {
  try {
    run();
    std::cout << "connected ok" << std::endl;
  } catch( const DBException &e ) {
    std::cout << "caught " << e.what() << std::endl;
  }
  return EXIT_SUCCESS;
}

They can be compiled using...

g++ test.cpp  -pthread -lmongoclient -lboost_thread-mt -lboost_filesystem -lboost_program_options -lboost_system -o test
Boon
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  • no idea why this works and why my example doesn't, but the fact is that it works, so thanks – lurscher Dec 29 '12 at 15:41
  • On Ubuntu, it's: g++ test.cpp -pthread -lmongoclient -lboost_thread -lboost_filesystem -lboost_program_options -lboost_system -lssl -lcrypto -o test – Stefan Steiger Dec 23 '14 at 07:47
1

The reason for your code's not working is the order of your includes. You just have to put dbclient.h in front of the the mongo includes. Actually, you only need dbclient.h, as it includes all other necessary headers.

What you additionally need to get this working with a shared_ptr, is a cast, for DBClientConnection::query()returns a std::auto_ptr.

The code below should work fine:

#include "mongo/client/dbclient.h"


using namespace mongo;

void run() {
  DBClientConnection c;
  c.connect("localhost");
boost::shared_ptr<DBClientCursor> cursor =
   (boost::shared_ptr<DBClientCursor>)  c.query("test", BSONObj());
  while (cursor->more())
      std::cout << cursor->next().toString() << std::endl;
}

int main() {
  try {
    run();
    std::cout << "connected ok" << std::endl;
  } catch( const DBException &e ) {
    std::cout << "caught " << e.what() << std::endl;
  }
  return EXIT_SUCCESS;
}
Marste
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