Develop Reference

generic ajax form submission

ajax/javascript problem:
I have an app which consist of multiple forms. What i want to achieve is to make a generic js function to submit forms to their respective controllers by getting form id.. I m successfully getting form ids in form_id variable but m unable to use them. I tried replacing $('patient_form') with form _id and got following error: TypeError: form_id.on is not a function
Here is the following code for better understanding of the problem:
$(function () {
var form = document.getElementsByTagName("form");
var form_id = "'#" + form[0].id + "'";
form_id.on('submit', function (e) {
e.preventDefault();
$.ajax({
type: 'post',
url: 'Controllers/c_insertPatient.php',
data: $('#patient_form').serialize(),
success: function (result) {
alert(result);
}
});
});
});

The way you have it form_id is a string.
Try:
var form_id = $("#" + form[0].id);

$.ajax is a jquery function. If you want to use jquery (which in this case I think you should), then do it as follows:
$('form').on('submit', function () {
$(this).preventDefaults();
$.ajax({
type: 'post',
url: 'Controllers/c_insertPatient.php',
data: $('#patient_form').serialize(),
success: function (result) {
alert(result);
}
});
});

In addition to the other answers, you want to keep your form ID dynamic, right, so you can insert whatever values you want?
$(function () {
var form = document.getElementsByTagName("form");
// note you have to convert to jQuery object
var form_id = $("#" + form[i].id); // i, so you can put in the id for any form
form_id.on('submit', function (e) {
e.preventDefault();
$.ajax({
type: 'post',
url: 'Controllers/c_insertPatient.php',
data: $(this).serialize(), // again, keep generic so this applies to any form
success: function (result) {
alert(result);
}
});
});
});

You should set the event listener to the element, not the string of the id of the element. Also I presume you have jQuery because you are using $. Set an id on the form in the HTML. Then:
$(function () {
var form = $('#theFormId');
form.submit(function(event) {
$.post('Controllers/c_insertPatient.php', form.serialize(), function() {
alert('success');
});
event.preventDefault();
});
});

Jquery/Ajax selectbox onChange trigger

Ok, what i'm trying to do is to create a list of select boxes which update their value each depending on the above:
the first one is like that:
<script>
var $schoolRegion = $('#stage_attendedSchoolRegion');
$schoolRegion.change(function() {
var $form = $(this).closest('form');
var data = {};
data[$schoolRegion.attr('name')] = $schoolRegion.val();
$.ajax({
url : $form.attr('action'),
type: $form.attr('method'),
data : data,
success: function(html) {
$('#stage_attendedSchoolDistrict').replaceWith(
$(html).find('#stage_attendedSchoolDistrict')
);
}
});
});
</script>
when it's value changes an ajax request is dispatched, and the choices of the "#stage_attendedSchoolDistrict" select are updated with the POST html value.
Since here's all good, now i need to do the same with the "#stage_attendedSchoolDistrict" select so:
<script>
var $schoolDistrict = $('#stage_attendedSchoolDistrict');
$schoolDistrict.on.change(function() {
var $form = $(this).closest('form');
var data = {};
data[$schoolDistrict.attr('name')] = $schoolDistrict.val();
$.ajax({
url : $form.attr('action'),
type: $form.attr('method'),
data : data,
success: function(html) {
$('#stage_attendedSchoolCity').replaceWith(
$(html).find('#stage_attendedSchoolCity')
);
}
});
});
</script>
The problem is that the event doesn't trigger at all. I'm thinking it is related to the fact that the former has values in the HTML of the page while the latter doesnt. How can i solve?
Any suggestion is appreciated, thanks for the help.

You're calling on.change in the second example instead of just .change as in the first example.

How to pass form input field value to external page using jquery

I have a form where I would like to pass the value of an text input field to an external page without a form submit event. I would like to field value to become a php variable on the external page.
Here is what I have so far:
<script type="text/javascript">
jQuery(document).ready(function() {
$(function() {
cityField = $('#the_form input[id=city]');
$.ajax({
type: "POST",
url: "external.php",
data:{ city: cityfield },
success: function(data){
console.log(data);
}
});
});
});
</script>
Within the external.php page, I would like to declare the city form field value as a php variable as
$city = $_POST['city'];

To start with
jQuery(document).ready(function() {
and
$(function() {
are equivalent. The $(function() should be something like
$("input[type='button']").click(function() {
so that when you click the button, it runs the ajax request.

I cleaned up the code but the data is not being sent to external.php. It is being set but not posting. Here is my revised code
<script type="text/javascript">
$('#city').blur(function() {
var cityField = document.querySelector('#city').value;
$.ajax({
type: "post",
url: "external.php",
data: {'cityField': cityField },
dataType: "text",
success: function(data, status){
if(status=="success") {
alert("You typed: " + cityField);
}
}
});
});

I dont feel right posting an answer for a single change... But
EDIT: There are actually a few things...
<!-- For .click() -->
Click Me!
<script type="text/javascript">
// $(function() { // Trigger on page load
// $('#doStuff').click(function() { // Trigger on a click
$('#city').blur(function() { // Trigger when the focus on the field is lost (click away, tab to another field, ect)
// $('#city').change(function() { // Trigger when the fields value changes
var cityField = $('#city');
$.ajax({
type: "POST",
url: "external.php",
data:{ 'city': cityField.val() },
success: function(data){
console.log(data);
}
});
});
</script>
Changes:
You dont need jQuery(document).ready(function() {}) AND $(function(){ }). Its the same thing.
Its smart to put a var in front on your variables.
Case is important. cityField and cityfield are not the same thing
You were just sending the whole dom element to your external script. (which I assume you only wanted the contents of the input)
Also, you dont need to look for "an input, with an 'id' attribute , with a value of 'city'". Just look for #city
EDIT:
Your updated code (just putting it here so its easier to see):
<script type="text/javascript">
$('#city').blur(function() {
var cityField=$('#city').val();
$.ajax({
type:"post",
url:"autosuggest.php",
data:{'cityField':cityField },
dataType:"text",
complete:function(data, status) {
alert("You typed: "+cityField);
}
});
});
</script>
Your data will should be available in autosuggest.php as $_POST['cityField'];
Having a status check within the success function, is a little redundant, in my opinion.
It would be better to move the success:function(data,... to a complete:function(data,...

jquery ajax data is not printing in parent element

my problem is when i try to show a value by ajax calling,it shows the value to "generic" class but when i try to show it on the parent row it is not showing anything.
here is my ajax code
$.ajax({
type: 'POST',
url: 'http://localhost/medical/index.php/purchase/test',
data: 'data=' + pid,
success: function() {
$.get('http://localhost/medical/index.php/purchase/test', function(data) {
$(this).parents('tr').find('.generic').html(data); // doesn't show the value
$( ".generic" ).html(); // this show the value but in all table row
});
}});
Thanks in Advance

The problem is called scope. this in context of the anonymous function means something else than it means outside. You can do it like this
var that = this;
$.ajax({
...
success: function() {
$.get(..., function(data) {
$(that).parents('tr').find('.generic').html(data);
});
}
});

jquery ajax form submit

Is this code correct? I'm trying to submit it and also I would like on submit if text area would be empty again.
<script type="text/javascript">
$(document).ready(function(){
$("form#submit").submit(function() {
// we want to store the values from the form input box, then send via ajax below
var fid = $(".messag").attr("id");
var val = $("#mess_ar").val();
$.ajax({
type: "POST",
url: "send_message.php",
data: "fid="+ fid +"&val="+ val,
success: function(){
$("#mess_ar").
}
});
return false;
});
}):
</script>
I'm trying to upload this:
<form id="submit" method="POST">
<textarea name="mess_cont" id="mess_ar" autofocus="autofocus" cols="70" rows="5"> </textarea>
<button id="mess_but" type="submit">Send</button>
</form>
Thankx...

Looks good. To empty the textarea use the following in the ajax success callback:
$("#mess_ar").val('');

​$(function(){
$("form#submit").submit(function(e){
e.preventDefault();
var fid = $(".messag").attr("id");
var val = $("#mess_ar").val();
$.ajax({
type: "POST",
url: "send_message.php",
data: "fid="+ fid +"&val="+ val,
success: function(){
$("#mess_ar").val("");
}
});
});
});​
Use
$("#submit").on('submit', function(e){...});
instead of
$("#submit").submit(function(e){...});
if you are using latest version of jquery.

What are you actually looking for? Does it return the data in response too? Add the functions to track your the error case too. Make something like
<script type="text/javascript">
$(document).ready(function(){
$("form#submit").submit(function() {
// we want to store the values from the form input box, then send via ajax below
var fid = $(".messag").attr("id");
var val = $("#mess_ar").val();
$.ajax({
type: "POST",
url: "send_message.php",
data: "fid="+ fid +"&val="+ val,
success: function(incoming_data){
// ALERT incoming data if coming
$("#mess_ar").text(""); // DO YOUR JOB CONTINUOU
},
error: function() {
alert("BROKEN REQUEST.");
}
});
return false;
});
});
</script>
Else, seems all fine.