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I am using Select2 jquery plugin and I can't get results with json. When looking json response in browser it looks ok. Like this for example:
[{
"id" : "50",
"family" : "Portulacaceae "
}, {
"id" : "76",
"family" : "Styracaceae "
}, {
"id" : "137",
"family" : "Dipsacaceae"
}
]
URL called with ajax in this case is: http://localhost/webpage/json_family.php?term=acac&_=1417999511783 but I can't get that results in select2 input, console says:
Uncaught TypeError: Cannot read property 'length' of undefined
Here is 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 error in code?
344
Ok, i have your example working on my test server, please do the following
change your query to this, changed a few names for readability but should be the same functionality, important part is addition of "AS TEXT" in query
$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);
second, it looks like you are trying to call a property from the json response called "results"
if that was the case your json should look like this, note that family is now text due to the change above:
{
"results":
[
{
"id": "50",
"text": "Portulacaceae "
},
{
"id": "76",
"text": "Styracaceae "
},
{
"id": "137",
"text": "Dipsacaceae"
}
]
}
But your php does not create the property results, so change your results function to remove the .results property call
results: function (data) {
return { results: data };
}
final code i used (note i did not escape/sanitize the $_GET[term] or bind it to the query, recommend you do so ) if you are still having issues i can send you a link to my site example
<!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);
?>
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