How To generate json format from model in codeigniter - mysql

Question

I Have Database :
enter image description here
how to query mysql in codeigniter model so that it can output json data like this :
enter code here</script">
$.ajax({
url: '?grid=true&tahun=' + tahuncikarang,
method: "GET",
success: function(data) {
var obj = JSON.parse(data);
}
Highcharts.chart('cikarang', {
chart: {
type: 'bar'
},
title: {
text: 'Highcharts multi-series drilldown'
},
subtitle: {
text: 'The <em>allowPointDrilldown</em> option makes point clicks drill to the whole category'
},
xAxis: {
type: 'category'
},
plotOptions: {
series: {
borderWidth: 0,
dataLabels: {
enabled: true
}
}
},
series: [{
name: '2010',
data: obj.tahun1
}, {
name: '2014',
data: obj.tahun2
}],
drilldown: {
allowPointDrilldown: false,
series: [{
id: 'republican-2010',
name: 'Republican 2010',
data: [
['East', 4],
['West', 2],
['North', 1],
['South', 4]
]
}, {
id: 'democrats-2010',
name: 'Republican 2010',
data: ''
}, ]
}
});
}
});
I try in model :
function index($tahuncikarang)
{
$this->db->select('nama AS nama, CONCAT(nama,"-", tahun) AS drilldown, sum(nilai) AS y');
$this->db->where('tahun=2010');
$this->db->group_by('nama')
->group_by('tahun');
$tahuna1 = $this->db->get(self::$table5);
$tahuna2 = array();
foreach ($tahuna1->result() as $row) {
array_push($tahuna2, $row);
}
$this->db->select('nama AS nama, CONCAT(nama,"-", tahun) AS drilldown, sum(nilai) AS y');
$this->db->where('tahun=2014');
$this->db->group_by('nama')
->group_by('tahun');
$tahunb1 = $this->db->get(self::$table5);
$tahunb2 = array();
foreach ($tahunb1->result() as $row) {
array_push($tahunb2, $row);
}
$result = array();
$result['tahun1'] = $tahuna2;
$result['tahun2'] = $tahunb2;
return json_encode($result, JSON_NUMERIC_CHECK);
}

Answer 1

I read your question just before.
If you could use this query, you maybe get good results.
Thank you
$qy = $this->db->query("select concat(lower(nama),'-',tahun) as id,concat(nama,'-',tahun) as name,group_concat(concat(zone,'-' ,nilai),',') as data group by nama, tahun")->result_array();
$result = array();
foreach($qy as $row) {
$temp = array(
"id"=>$row['id'],
"name"=>$row['name'],
"data"=>array()
);
$array = explode(',',$row['data']);
foreach($array as $el) {
$temp['data'][]=explode('-',$el);
}
$result[] = $temp;
}
echo json_encode($result);