问题
I've problem with JSON and jqPlot.
jQuery script:
var line = [ ];
$(function(){
$.getJSON('bin/gielda.php', function(data) {
$.each(data, function (index, value) {
line.push(["'"+data[index].data+"'",data[index].kurs_odn]);
});
console.log(line);
});
$.jqplot('chartdiv', [line], {
title :' Giełda',
axes : {
xaxis : {
renderer : $.jqplot.DateAxisRenderer
}
},
series : [{
lineWidth : 4,
markerOptions : {
style : 'square'
}
}]
});
});
php from gielda.php:
$pdo = new PDO('mysql:host=localhost;dbname=gielda', 'root', '');
$pdo -> setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sql = $pdo -> prepare("SELECT data,kurs_odn FROM template WHERE nazwa=?");
$sql -> execute(array("ASSECOPOL"));
$gielda = $sql->fetchAll(PDO::FETCH_ASSOC);
echo json_encode($gielda);
Result from php file is like this:
[{"data":"2010-08-19","kurs_odn":"55.75"},{"data":"2010-08-19","kurs_odn":"55.75"},{"data":"2010-08-19","kurs_odn":"55.75"},{"data":"2010-08-20","kurs_odn":"56.2"},{"data":"2010-08-20","kurs_odn":"56.2"},{"data":"2010-08-20","kurs_odn":"56.2"}]
Console.log from variable line:
[["'2010-08-19'", "55.75"], ["'2010-08-19'", "55.75"], ["'2010-08-19'", "55.75"], ["'2010-08-20'", "56.2"], ["'2010-08-20'", "56.2"], ["'2010-08-20'", "56.2"]]
and error: uncaught exception: [object Object]
回答1:
I probably found the solution. At first $.jqplot have to be inside $.getJSON - I forgot about asynchronous invocation code in JavaScript.
I unnecessarily added quote mark to data[index].data
line.push(["'"+data[index].data+"'",data[index].kurs_odn]);
But I had to add Number(data[index].kurs_odn) becouse that was string by default. Now it seems working fine.
来源:https://stackoverflow.com/questions/3535680/loading-json-data-into-jqplot