Get key name of array value in twig for loop

Question

I'm trying to have twig to output the key name(column name from mysql data). What I want to do is basicly: <a class="listquestions" href="#" id="{{ key }}"...

Current codebase:

<table id="listquestions" class="table table-striped table-bordered table-hover" cellspacing="0" width="100%">
<thead>
    <tr>
        {% for key, answer in answers[0] %}
            <th>{{ key }}</th>
        {% endfor %}
    </tr>
</thead>
<tbody> 
    {% for key,answer in answers %}
        <tr>
            <td>{{ answer.a_id }}</td>
            <td>
                <a class="listquestions" href="#" data-name="a_text" data-type="text" data-pk="{{ answer.a_id }}" data-url="{{ path_for('qa.edit') }}" data-title="enter attribute name">
                    {{ answer.a_text }}
                </a>
            </td>
            <td>
                <a class="listquestions" href="#" data-name="a_attribute_name" data-type="text" data-pk="{{ answer.a_id }}" data-url="{{ path_for('qa.edit') }}" data-title="enter attribute name">
                    {{ answer.a_attribute_name}}
                </a>
            </td>
        </tr>
    {% endfor %}
</tbody>

PHP function var_export($data,true) outputs:

array (
  0 => 
  array (
    'a_id' => '1',
    'a_text' => 'text',
    'a_attribute_name' => 'attr',
  ),
  1 => 
  array (
    'a_id' => '2',
    'a_text' => 'text',
    'a_attribute_name' => 'attr',
  ),
  2 => 
  array (
    'a_id' => '3',
    'a_text' => 'text',
    'a_attribute_name' => 'attr',
  ),
)

I tried adding a TwigExtension that does key($answer.a_text) but key() does not work with twig for-loops.

So what am I missing? I can output the key name inside <thead> as you see but I'd like to do this with the second for-loop.

And what is the problem? I don't see id="{{ key }}" in your code — u_mulder
– u_mulder, Commented Sep 13, 2016 at 6:45
I think it has something to do with nested arrays, I'm only itterating over $arr[0] in the <thead>, {{ key }} only outputs "0","1","2"... — Johannes Stenmark
– Johannes Stenmark, Commented Sep 13, 2016 at 6:50
What is the expected content of key then? Imho for this situation you'll need to specify the key manually — DarkBee
– DarkBee, Commented Sep 13, 2016 at 7:27
I think you have to use a second for loop for your fields: {% for key,answer in answers %} <tr> {% for field,value in answer %} {% if field = 'a_id' %} <td></td> {% else %} <td><a/></td> — danopz
– danopz, Commented Sep 13, 2016 at 8:02
@DarkBee I have it hardcoded in the codebase, it's supposed to be one of either a_id, a_text, a_attribute_name . — Johannes Stenmark
– Johannes Stenmark, Commented Sep 13, 2016 at 9:34

DarkBee · Accepted Answer · 2016-09-13 11:53:22Z

1

<table id="listquestions" class="table table-striped table-bordered table-hover" cellspacing="0" width="100%">
<thead>
    <tr>
        {% for key, answer in answers[0] %}
            <th>{{ key }}</th>
        {% endfor %}
    </tr>
</thead>
<tbody> 
    {% for key,answer in answers %}
        {% for field, value in answer %}
        <tr>
           {% if field == 'a_id' %}
            <td>{{ answer.a_id }}</td>
            {% else %}
            <td>
                <a class="listquestions" href="#" data-name="{{ field }}" data-type="text" data-pk="{{ answer.a_id }}" data-url="path_for('qa.edit')" data-title="enter attribute name">
                    {{ value }}
                </a>
            </td>
            {% endif %}
        </tr>
        {% endfor %}
    {% endfor %}
</tbody>
</table>

answered Sep 13, 2016 at 11:53

DarkBee

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