Check if exists before saving in moongodb and nodejs

I need to save an array in my MondoDB database. I do this without problems with the following code:

My array of objects:

[ { name: '1', type: 'float', value: 89.05, timestamp: 1535440000 },
  { name: '10', type: 'float', value: 19.67, timestamp: 1535440000 },
  { name: '15', type: 'float', value: 1.7, timestamp: 1535440000 },
  { name: '17', type: 'float', value: 2.2, timestamp: 1535440000 } ]

save code:

data_Greenhouse.collection.insert(data_inver, function (err, docs) {
      if (err){
        res.status(500).send({message: 'Error al guardar en la base de datos'})
      } else {
        console.log("Multiple documents inserted to Collection Data_Greenhouse");
        res.status(200).send({data_Greenhouse: docs})
  }
});

I need to check before saving the array if there is already a record for the name field and for the date in my collection. If it exists, do not save it and otherwise save it.

How could I do this?

Greetings, thank you. I hope this is well explained is somewhat confusing.

EDIT01

I edit the Post with a summary of what I need.

I really need to pass the array of objects to my query and check if it exists and generate a new one with the values ​​that are not in the database check.

EDIT02

The code I am using is the following:

data_inver.forEach(elem => {
   var Yaexiste = Data_Greenhouse.findOne({ 'name': elem.name,'timestamp':elem.timestamp}); // Realizas la busqueda en la DB para cada objeto sino existe, entonces lo inserta
   console.log('mostramos los valores: ' + elem.name +" " +  elem.timestamp);

   console.log('mostramos los valores: ' + Yaexiste[0]);

   if(Yaexiste==undefined){
     data_Greenhouse.collection.insert(elem, function (err, docs) {
     if (err){
      res.status(500).send({message: 'Error al guardar en la base de datos'})
      console.log("Error");

     } else {
      console.log("Guardado");
      //res.status(200).send({docs})
     }
    });
  }else {
    console.log('Los datos ya existen');
  }
  });

The response I get is the following:

mostramos los valores: 653 1535440000
mostramos los valores: undefined
Los datos ya existen
mostramos los valores: 657 1518420000
mostramos los valores: undefined
Los datos ya existen
mostramos los valores: 8 1535440000
mostramos los valores: undefined
Los datos ya existen

As you can see, it does not enter theif Yaexiste==undefined

Final solution:

If it behaves correctly I will add it as an answer.

Data_Greenhouse.findOne({ 'name': elem.name ,'timestamp':elem.timestamp}, function (err, user) {
   console.log('mostramos los valores: ' + user);
   if(user==null){
     data_Greenhouse.collection.insert(elem, function (err, docs) {
     if (err){
      res.status(500).send({message: 'Error al guardar en la base de datos'})
      console.log("Error");

     } else {
      console.log("Guardado");
      //res.status(200).send({docs})
     }
    });
   }else {
    console.log('Los datos ya existen');
   }
   });
 });