mongodb query object in array code example
Example 1: mongodb find array with element
// Finds all documents that have a property named "tags"
// which has at least one array element matching "red"
db.inventory.find( { tags: "red" } )
Example 2: how to query array of object in mongoos
User.findOne({'local.rooms': {$elemMatch: {name: req.body.username}}}, function (err, user) {
if (err){
return done(err);
}
if (user) {
console.log("ROOM NAME FOUND");
req.roomNameAlreadyInUse = true;
next();
} else {
req.roomNameAlreadyInUse = false;
console.log("ROOM NAME NOT FOUND");
next();
}
});