Mongodb Objectid returning [Object Object] in Ajax

Question

In a query I do in Mongodb using Ajax and PHP, when I manipulate Objectid already in javascript, it returns me as [Object Object]. How do I use it as a string?

It follows code $.ajax()

$.ajax({
    url: 'funcoes/registroeventos.php',
    data: {
        "ref": ref
    },
    type: 'post',
    dataType: 'json',
    cache: false,
    beforeSend: function (xhr) {
    },
    error: function (jqXHR, textStatus, errorThrown) {
    },
    success: function (dados) {
        $.each(dados, function () {
            $.each(this, function (index, value) {
                alert(value);
            });
        });
    }
});

Follow the PHP code:

$ref = $_POST['ref'];
    try {
        $consulta = ['ref' => $ref, 'excluido' => 'n'];
        $opcoes = [];
        $query = new MongoDB\Driver\Query($consulta, $opcoes);
        $linhas = $conexao->executeQuery($bd . "maquinas", $query);

        echo json_encode(iterator_to_array($linhas));
    } catch (Exception $exc) {
        echo $exc->getTraceAsString();
    }

Example of Json:

[
     {"_id":{"$oid":"5aafac02dc32b7f93a3fda00"}, "ref":"DIP001", 
      "nome":"Dip Tork", "status":"setup", "excluido":"n",
       "idsetor":"5aafaba2dc32b7f93a3fd9ff"} 
]

Answer 1

From your comment, you realize you’ve had a hard time understanding, this JSON is actually a array information, ie has positions for each item, example:

let item = [{"_id":{"$oid":"5aafac02dc32b7f93a3fda00"}, 
             "ref":"DIP001", "nome":"Dip Tork", 
              "status":"setup", "excluido":"n",
               "idsetor":"5aafaba2dc32b7f93a3fd9ff"} ] ;

console.log(item[0]['_id']['$oid']);
console.log(item[0]['ref']);
console.log(item[0]['nome']);
console.log(item[0]['status']);
console.log(item[0]['excluido']);
console.log(item[0]['idsetor']);

in this case, there is only one item in the array which is the 0, but if it contains more you have to check the quantity of items in the array to search your items, example:

let item = [{
  "_id": {
    "$oid": "5aafac02dc32b7f93a3fda00"
  },
  "ref": "DIP001",
  "nome": "Dip Tork",
  "status": "setup",
  "excluido": "n",
  "idsetor": "5aafaba2dc32b7f93a3fd9ff"
}, {
  "_id": {
    "$oid": "5aafac02dc32b7f93a3fdaaa"
  },
  "ref": "DIP001",
  "nome": "Dip Tork",
  "status": "setup",
  "excluido": "n",
  "idsetor": "5aafaba2dc32b7f93a3fd9ff"
}];
console.log('Quantidade de itens:' + item.length);
for (i = 0; i < item.length; i++) {
  console.log('-----------------------------');
  console.log(item[i]['_id']['$oid']);
  console.log(item[i]['ref']);
  console.log(item[i]['nome']);
  console.log(item[i]['status']);
  console.log(item[i]['excluido']);
  console.log(item[i]['idsetor']);  
}