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Error Select2.js: Unable to read property length undefined

I am using the Select2 jquery plugin and I cannot get the results using json. When looking for json answer in browser this looks ok. For example, for example:

[{
        "id" : "50",
        "family" : "Portulacaceae "
    }, {
        "id" : "76",
        "family" : "Styracaceae "
    }, {
        "id" : "137",
        "family" : "Dipsacaceae"
    }
]

The url named ajax in this case: http://localhost/webpage/json_family.php?term=acac&_=1417999511783but I cannot get the results in select2, the console says:

Uncaught TypeError: Unable to read property 'length' from undefined

Here is the code:
HTML

<input type="hidden" id="select2_family" name="term" style="width:30%" />

Js

$("#select2_family").select2({
  minimumInputLength: 3,
  ajax: {
   url: "json_family.php",
   dataType: 'json',
   data: function (term) {
       return {
         term: term,
       };
   },
   results: function (data) {
     return { results: data.results };
   }

  }
});

Php

$myArray = array();
if ($result = $mysqli->query("SELECT id,family FROM family WHERE family LIKE '%$term%'")) {
    $tempArray = array();
    while($row = $result->fetch_object()) {
            $tempArray = $row;
            array_push($myArray, $tempArray);
        }
    echo json_encode($myArray);
}

Is there a mistake in the code?

+4
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3 answers

Ok, my example is working on my test server, please do the following

, , , "AS TEXT"

$query = $mysqli->query("SELECT id, family AS text FROM family WHERE family LIKE '%$term%'"));
    while ($row = mysql_fetch_assoc($query)) {
           $return[] = $row;
         }

    echo json_encode($return);

-, , json- "results"

, json , , - :

{
"results":
[
    {
        "id": "50",
        "text": "Portulacaceae "
    },
    {
        "id": "76",
        "text": "Styracaceae "
    },
    {
        "id": "137",
        "text": "Dipsacaceae"
    }
]
}

php , , .results

   results: function (data) {
     return { results: data };
   }

, ( , / $_GET [] , ), ,

<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/select2/3.5.2/select2.css">
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.js"></script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/select2/3.5.2/select2.js"></script>
</head>
<script>
$(document).ready(function () {

$("#select2_family").select2({
  minimumInputLength: 3,
  ajax: {
   url: "select2.php",
   dataType: 'json',
   data: function (term) {
       return {
         term: term,
       };
   },
   results: function (data) {
     return { results: data };
   }
  }
});

});
</script>

<input type="hidden" id="select2_family" name="term" style="width:30%" />

</html>

PHP

<?

/*** connection strings ***/

// get the database singleton instance
$yog = MySqlDatabase::getInstance();

// connect
try {
    $yog->connect($host, $user, $password, $db_name);
}
catch (Exception $e) {
    die($e->getMessage());
}

$term = $_GET['term'];

if (!$term){
$sub = $yog->query("SELECT id, family AS text FROM family");
} else {
$sub = $yog->query("SELECT id, family AS text FROM family where family like '%$term%'");
}

while ($row = mysql_fetch_assoc($sub)) {
       $return[] = $row;
     }

echo json_encode($return);

?>
+6

: . , .

json , .

$("#select2_family").select2({
  minimumInputLength: 3,
  ajax: {
   url: "json_family.php",
   dataType: 'json',
   data: function (term) {
       return {
         term: term,
       };
   },
   results: function (data) {

     // CHANGED
     return { results: data };

   }

  }
});

- ,

$myArray = array();

// here
if ($result = $mysqli->query("SELECT id, family AS text FROM family WHERE family LIKE '%$term%'")) {
    $tempArray = array();
    while($row = $result->fetch_object()) {
            $tempArray = $row;
            array_push($myArray, $tempArray);
        }
    echo json_encode($myArray);
}
+1

you need to determine the property textby the results

and you may need to add formatResultandformatSelection

$("#select2_family").select2({
    minimumInputLength: 3,
    ajax: {
        url: "json_family.php",
        dataType: 'json',
        data: function (term) {
            return {
                term: term,
            };
        },
        results: function (data) {return { results: data, text: 'family'}; },
        formatResult: function(item) { return item.family; }, 
        formatSelection: function(item) { return item.family; }
    }
});
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