FatFree pass array to a view using Jig data mapper - view

Question

I have data/faqs.json like this.
{
"section-1" : {
"sub-section-1" : {
"557aef62e0629": {
"question": "how are you?",
"answer": "fine.. you?"
},
"557af3d40b041": {
"question": "Question",
"answer": "Answer to question"
}
},
"sub-section-2": {
"557af3d80b041": {
"question": "another section question?",
"answer": "another section answer?"
}
}
},
"section-2" : {
"557af32d201f6": {
"question": "Question",
"answer": "Answer to question"
},
"557af33c7c60e": {
"question": "Question",
"answer": "Answer to question"
}
}
}
and in my controller method:
$faqs = [];
$mapper = new \DB\Jig\Mapper($this->db, 'faqs.json');
$mapper->load();
while (!$mapper->dry()) {
$faqs[] = $mapper->cast();
$mapper->next();
}
$this->f3->set('faqdata', $faqs);
to send faqdata to the view.
In my view I tried:
<repeat group="{{ #faqdata[1] }}" key="{{ #key }}" value="{{ #faqs }}">
<div>
<p><span><b>{{ #key }}</b></span></p>
<repeat group="{{ #faqs }}" key="{{ #k }}" value="{{ #v }}">
<dt>{{ #k }}</dt>
<dd>{{ #v }}</dd>
</repeat>
</div>
</repeat>
to read only section-2 of faqs, but I get the error:
Invalid argument supplied for foreach()
Why is #faqs considered as invalid argument to foreach()?
EDIT:
This is what var_dump shows:
array(2) {
[0]=>
array(3) {
["sub-section-1"]=>
array(5) {
["557aef62e0629"]=>
array(2) {
["question"]=>
string(12) "how are you?"
["answer"]=>
string(11) "fine.. you?"
}
["557af0d114839"]=>
array(2) {
["question"]=>
string(35) "hi there, this is quesiton number 2"
["answer"]=>
string(19) "this is answer no 2"
}
["557af32d201f6"]=>
array(2) {
["question"]=>
string(8) "Question"
["answer"]=>
string(18) "Answer to question"
}
["557af33c7c60e"]=>
array(2) {
["question"]=>
string(8) "Question"
["answer"]=>
string(18) "Answer to question"
}
["557af3d40b041"]=>
array(2) {
["question"]=>
string(8) "Question"
["answer"]=>
string(18) "Answer to question"
}
}
["sub-section-2"]=>
array(1) {
["557af3d80b041"]=>
array(2) {
["question"]=>
string(25) "another section question?"
["answer"]=>
string(23) "another section answer?"
}
}
["_id"]=>
string(9) "section-1"
}
[1]=>
array(3) {
["557af32d201f6"]=>
array(2) {
["question"]=>
string(8) "Question"
["answer"]=>
string(18) "Answer to question"
}
["557af33c7c60e"]=>
array(2) {
["question"]=>
string(8) "Question"
["answer"]=>
string(18) "Answer to question"
}
["_id"]=>
string(9) "section-2"
}
}
So isn't section-2 array of arrays?

Answer 1

That's because #faqdata[1] contains the index of the array: _id => 'section-2'. So you can't just loop through its properties. You should call the expected properties instead (question and answer).
Anyway since your intent is to get the whole data array, a direct call to the Jig::read would be simpler. You don't need the mapper for that. See:
$faqs = $this->db->read('faqs.json');
Now $faqs['section-2'] contains the 2nd section.
UPDATE:
In order to display that kind of data, you need a recursive view. This can be achieved, using the with attribute of the <include> tag. Cf. the docs.
Here's how we could do it in your case, assuming your view is named faqs.html:
<ul>
<repeat group="#faqs" key="#section" value="#data">
<li>
<span>{{ #section }}</span>
<check if="($faq=reset(#data)) && isset(#faq.question)">
<true>
<ul>
<repeat group="#data" value="#faq">
<li>
{{ #faq.question }}
=>
{{ #faq.answer }}
</li>
</repeat>
</ul>
</true>
<false>
<include href="faqs.html" with="faqs={{ #data }}"/>
</false>
</check>
</li>
</repeat>
</ul>