StatusWith<BSONObj> fixDocumentForInsert(ServiceContext* service, const BSONObj& doc) {
if (doc.objsize() > BSONObjMaxUserSize)
return StatusWith<BSONObj>(ErrorCodes::BadValue,
str::stream() << "object to insert too large"
<< ". size in bytes: "
<< doc.objsize()
<< ", max size: "
<< BSONObjMaxUserSize);
auto depthStatus = validateDepth(doc);
if (!depthStatus.isOK()) {
return depthStatus;
}
bool firstElementIsId = false;
bool hasTimestampToFix = false;
bool hadId = false;
{
BSONObjIterator i(doc);
for (bool isFirstElement = true; i.more(); isFirstElement = false) {
BSONElement e = i.next();
if (e.type() == bsonTimestamp && e.timestampValue() == 0) {
// we replace Timestamp(0,0) at the top level with a correct value
// in the fast pass, we just mark that we want to swap
hasTimestampToFix = true;
}
auto fieldName = e.fieldNameStringData();
if (fieldName[0] == '$') {
return StatusWith<BSONObj>(
ErrorCodes::BadValue,
str::stream() << "Document can't have $ prefixed field names: " << fieldName);
}
// check no regexp for _id (SERVER-9502)
// also, disallow undefined and arrays
// Make sure _id isn't duplicated (SERVER-19361).
if (fieldName == "_id") {
if (e.type() == RegEx) {
return StatusWith<BSONObj>(ErrorCodes::BadValue, "can't use a regex for _id");
}
if (e.type() == Undefined) {
return StatusWith<BSONObj>(ErrorCodes::BadValue,
"can't use a undefined for _id");
}
if (e.type() == Array) {
return StatusWith<BSONObj>(ErrorCodes::BadValue, "can't use an array for _id");
}
if (e.type() == Object) {
BSONObj o = e.Obj();
Status s = o.storageValidEmbedded();
if (!s.isOK())
return StatusWith<BSONObj>(s);
}
if (hadId) {
return StatusWith<BSONObj>(ErrorCodes::BadValue,
"can't have multiple _id fields in one document");
} else {
hadId = true;
firstElementIsId = isFirstElement;
}
}
}
}
if (firstElementIsId && !hasTimestampToFix)
return StatusWith<BSONObj>(BSONObj());
BSONObjIterator i(doc);
BSONObjBuilder b(doc.objsize() + 16);
if (firstElementIsId) {
b.append(doc.firstElement());
i.next();
} else {
BSONElement e = doc["_id"];
if (e.type()) {
b.append(e);
} else {
b.appendOID("_id", NULL, true);
}
}
while (i.more()) {
BSONElement e = i.next();
if (hadId && e.fieldNameStringData() == "_id") {
// no-op
} else if (e.type() == bsonTimestamp && e.timestampValue() == 0) {
auto nextTime = LogicalClock::get(service)->reserveTicks(1);
b.append(e.fieldName(), nextTime.asTimestamp());
} else {
b.append(e);
}
}
return StatusWith<BSONObj>(b.obj());
}
StatusWith<BSONObj> fixDocumentForInsert( const BSONObj& doc ) {
if ( doc.objsize() > BSONObjMaxUserSize )
return StatusWith<BSONObj>( ErrorCodes::BadValue,
str::stream()
<< "object to insert too large"
<< ". size in bytes: " << doc.objsize()
<< ", max size: " << BSONObjMaxUserSize );
bool firstElementIsId = doc.firstElement().fieldNameStringData() == "_id";
bool hasTimestampToFix = false;
{
BSONObjIterator i( doc );
while ( i.more() ) {
BSONElement e = i.next();
if ( e.type() == Timestamp && e.timestampValue() == 0 ) {
// we replace Timestamp(0,0) at the top level with a correct value
// in the fast pass, we just mark that we want to swap
hasTimestampToFix = true;
}
const char* fieldName = e.fieldName();
if ( fieldName[0] == '$' ) {
return StatusWith<BSONObj>( ErrorCodes::BadValue,
str::stream()
<< "Document can't have $ prefixed field names: "
<< e.fieldName() );
}
// check no regexp for _id (SERVER-9502)
// also, disallow undefined and arrays
if ( str::equals( fieldName, "_id") ) {
if ( e.type() == RegEx ) {
return StatusWith<BSONObj>( ErrorCodes::BadValue,
"can't use a regex for _id" );
}
if ( e.type() == Undefined ) {
return StatusWith<BSONObj>( ErrorCodes::BadValue,
"can't use a undefined for _id" );
}
if ( e.type() == Array ) {
return StatusWith<BSONObj>( ErrorCodes::BadValue,
"can't use an array for _id" );
}
if ( e.type() == Object ) {
BSONObj o = e.Obj();
Status s = o.storageValidEmbedded();
if ( !s.isOK() )
return StatusWith<BSONObj>( s );
}
}
}
}
if ( firstElementIsId && !hasTimestampToFix )
return StatusWith<BSONObj>( BSONObj() );
bool hadId = firstElementIsId;
BSONObjIterator i( doc );
BSONObjBuilder b( doc.objsize() + 16 );
if ( firstElementIsId ) {
b.append( doc.firstElement() );
i.next();
}
else {
BSONElement e = doc["_id"];
if ( e.type() ) {
b.append( e );
hadId = true;
}
else {
b.appendOID( "_id", NULL, true );
}
}
while ( i.more() ) {
BSONElement e = i.next();
if ( hadId && e.fieldNameStringData() == "_id" ) {
// no-op
}
else if ( e.type() == Timestamp && e.timestampValue() == 0 ) {
mutex::scoped_lock lk(OpTime::m);
b.append( e.fieldName(), OpTime::now(lk) );
}
else {
b.append( e );
}
}
return StatusWith<BSONObj>( b.obj() );
}