accessing $_POST in a presenter

$this->getHttpRequest()->getPost();

i got past some issues, and tracy throws no errors. but the
return value from signal<Query> is not working right.

the situation is:
code: both in latte template:(abbreviated)

<input onkeyup=“mine(this.value)”>
<span id=“txtHint”></span>

and: javascript code in same latte template:
function mine(str) {
val = {link query! str}
document.getElementById(“txtHint”).textContent = val;
}

in the presenter code:
public function handleQuery(string $q="") { if ($this->isAjax() {} }

result on execution: (execution: typing any letter in the input field executes the mine method.

the return value is being assigned to ID “txtHint” above is:
“/MESSAGING-SYSTEM-SEND/?Q=STR&DO=QUERY”

so i think i am close…

i have tried in the presenter with no effect on the above:

$this->sendResponse(“test”);
$this->sendJson(‘id’ ⇒ ‘test’);

but the result is unchanged. I think i am close…

I've read through a lot of great docs on Nette for AJAX, HTTP stuff, but its
not helping me yet to get a simple simple signal working yet, since of course,
i am new on this …

my first objective is to get the word “test” into the ID “txtHint”
once i get this done, the rest will be cake :-)
James
ps. thanks very much for any assistance…

Thanks so much! I'll try it out. looks very clean…
nice call, nice catch… Nette is amazing…will allow
real-time update of so many things…thanks again!
James

Oh, I see – I used the same name for the signal parameter and for the variable in JS – now I see that you had originally named the signal argument $q.

In the JS call the {link query!} gets translated to URL, and the next token { str: str } is already a JS object that appends the key-val to the URL.

To use your original naming, you can update it like this:

<script>
function mine(str) {
	$.getJSON({link query!}, { q: str }, function (payload) { // the "q" gets appended to URL and can be used as $q variable as the signal argument
		$('#txtHint').text(payload.text);
	});
}
</script>

And the signal:

public function handleQuery(?string $q): void
{
	if (!$this->isAjax()) {
		$this->error('', 403);
	}

	$this->sendJson(['text' => $q]); // is accessed via payload.text in JS above
}

Since we're calling $.getJSON(), calling $this->getHttpRequest()->getPost() should return an empty array since it's not a POST request.

It's logical, because you're not sending POST request, but GET request ($.getJSON).
That's why the POST data are empty.

The main idea is that the $str variable is of same name as the key in JS object you're passing in the $.getJSON call.
You don't need to serialize / unserialize any JSON – it's done by jQuery on the client side and by Nette on the server side.

Trivia:

<script>$.getJSON({link query!}, { myparameter: str });</script>

function handleQuery(?string $myparameter): void {}

thank god its done :-)
the objective here was to have a feature show matches as the users put in 1 letter, 2 etc.
basically an autocomplete feature. very useful for many things…
names, files, messages (in this case)

three elements for the feature are the html, javascript and presenter code in php
simple, yes, but not for me :-)

1. FORM in latte template

<form role="form" id="f2" n:name=sendMessageForm class=form autocomplete="on">
					<fieldset>
					<div class="form-group"><label>Send to:</label><input placeholder="User name" class="form-control"
							n:name="username" type="text" size=20 autofocus="" onkeyup="mine(this.value)"></div>

2. JAVASCRIPT in latte template

<script>
function mine(str) {

	$.getJSON({link query!}, { str: str }, function (payload) {
		$('#txtHint').text(payload.text);
	});
}
</script>

3. PRESENTER code in handle<SIGNAL>

	public function handleQuery(?string $str): void {

			if (!$this->isAjax()) {
				$this->error('', 403);
			}

			//array can be from file, database, etc.
			$members = ['james','melisa','cay','jack','uestla','george'];
			$hint = "";

			// lookup all hints from array if $str is different from ""
			if ($str !== "") {
				$str = strtolower($str);
				$len=strlen($str);

				foreach($members as $name) {
					if (stristr($str, substr($name, 0, $len))) {
						if ($hint === "") {
							$hint = $name;
      					} else {
	  						$hint .= ", $name";
      					}
    				}
  				}
			}
			$this->sendJson(['text' => $hint]);
	}

now i can walk the dog with a smile hehe
James