Symfony2 only use values from json_encode

Question

I'm getting some information from my database and holding that information in an array. I've used {{dump(weights)}} in my twig template, see below the dump of the array:

enter image description here

If i use weights|json_encode() I can get this information:

enter image description here

Which is okay, but my graph needs the data in a format like this - [69,72].

For example, this is how the code should look for the graph:

var geckoWeight = {
  labels: dates,
  datasets: [
    {
      label: "Front",
      fillColor: "rgba(0, 0, 0, 0.15)",
      strokeColor: gradient,
      pointColor: gradient,
      pointStrokeColor: "#202b33",
      pointHighlightStroke: "rgba(225,225,225,0.9)",
      data: [69,72]
    }
  ]
};

What is the best way to manipulate my data to suit what is needed in the graph data?

@EJTH can you give any information on getting twig to transform it? — Andy Holmes
– Andy Holmes, Commented May 30, 2015 at 22:31

felipsmartins · Accepted Answer · 2015-05-30 23:25:23Z

2

I would do something like this (in a Model method or controller):

class MyController extends Controller
{

    public function someAction()
    {
        $data = array(
            array('weight' => 69),
            array('weight' => 72),
        );

       $graphData = array_map(function($i) { return $i['weight']; }, $data);

        return $this->render('default/index.html.twig', array(           
            'data' => $weights,
        ));
    }

On my twig template:

<script>
    var weights = {{ data|json_encode }};
</script>

edited May 30, 2015 at 23:25

answered May 30, 2015 at 22:40

felipsmartins

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11 Comments

Andy Holmes Over a year ago

I think the way i'm doing it at the moment is the long way round of doing it. I will explore this option in a minute and let you know how i get on :)

Andy Holmes Over a year ago

I've tried this, however the dump just returns []

felipsmartins Over a year ago

Well, It works for me. What $graphData returns in your controller?

Andy Holmes Over a year ago

Nothing, it's just []

felipsmartins Over a year ago

hmm... So how your weight looks like? I think that's different that you have shown.

|

EJTH · Accepted Answer · 2015-05-30 22:32:42Z

0

You could just do that in the JS code:

var myWeights = {{ weights|json_encode() }};
var myWeightsArr = [];
for(var i in myWeights){
   if(myWeights.hasOwnProperty(i))
   myWeightsArr.push(myWeights[i].weight);
}

answered May 30, 2015 at 22:32

EJTH

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3 Comments

Andy Holmes Over a year ago

Doesn't appear to work if i set data: myWeightsArr

EJTH Over a year ago

Can you get me the source of what is being output ?

Andy Holmes Over a year ago

It's just putting 69,72 which is kind of right, but as you can see in the code example, it needs to be [69,72]

Damonsson · Accepted Answer · 2015-05-30 22:56:32Z

0

Based on Your input data, something like this, should give You requested output

[
{% for weightsArray in weights %}
    {% if loop.index0 > 0 %},{% endif %}
    {% for weight in weightsArray %}
        {{ weight }}
    {% endfor %}
{% endfor %}
]

answered May 30, 2015 at 22:56

Damonsson

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