Passing form data to controller using AJAX and jquery with Codeigniter - php

Question

I am trying to post the data from this form into the database. I have tried some tutorials with no success. Here is my code. Any ideas?
View:
<form method="post" name="myForm1" id="myForm1" enctype="multipart/form-data" >
Email: <input type="text" name="email" id="email">
Question: <input type="text" name="qText" id="qText">
<input id="submitbutton" type="submit">
</form>
AJAX (in the view, right below the form)
<script type='text/javascript' language='javascript'>
$("#submitbutton").click(function(){
$.ajax({
url:'http://localhost:8888/index.php/trial/insert_into_db',
type: 'POST',
data: $("#myForm1").serialize(),
success: function(){
alert("success");
},
error: function(){
alert("Fail")
}
});
e.preventDefault();
});
</script>
Controller
function insert_into_db(){
$this->load->model('insert_db');
$this->insert_db->insertQ();
}
Model
class Insert_db extends CI_Model{
function insertQ(){
$email = $_POST['email'];
$qText = $_POST['qText'];
$this->db->query("INSERT INTO questions VALUES('','$email','$qText','','')");
}
}

Answer 1

As #David Knipe already said, you should wait for the DOM to be ready before trying to access one of its elements. Moreover, you likely have an e is undefined error, since you're not passing the event reference to the click handler:
<script> //no need to specify the language
$(function(){
$("#submitbutton").click(function(e){ // passing down the event
$.ajax({
url:'http://localhost:8888/index.php/trial/insert_into_db',
type: 'POST',
data: $("#myForm1").serialize(),
success: function(){
alert("success");
$('#email').val('');
$('#qText').val('');
},
error: function(){
alert("Fail")
}
});
e.preventDefault(); // could also use: return false;
});
});
</script>
To be more complete, your query is vulnerable, and you might be getting an error there. Make use of the advantage of having a framework beneath you:
function insertQ(){
$email = $this->input->post('email');
$qText = $this->input->post('qText');
$this->db->insert('questions', array('email' =>$email, 'text' => $text));
}
^_ I'm guessing the column names since you didn't specify them

Answer 2

Looks like you've forgotten to use $.ready. As it is, the javascript runs before the page has loaded, which means it can't find the page element from $("#submitbutton"). Try this:
$(document).ready(function() {
$("#submitbutton").click(function(){
....
....
});