jquery post with $.ajax, how to avoid multiple post? - php

Question

still looking for a solution but not find yet, I have a function to manage different forms on same/differents pages
function formStantardAction(correctAnswer,addCustomData){
addCustomData = (typeof addCustomData == "undefined")?'':addCustomData;
correctAnswer = (typeof correctAnswer == "undefined")?'Saved.':correctAnswer;
$('form.standard').submit(function(event){
event.preventDefault();
var modalWin = $(this).parent();
var values = $('form.standard').serialize() + addCustomData;
$.ajax({
url: "inc/gateway.php",
data: values,
type: "POST",
success: function(data){
if (data == "OK"){
$(modalWin).html(correctAnswer).delay(500).fadeOut(500);
setTimeout(function() {
mw_close();
}, 1000);
}else{
alert(data);
}
}
});
});
}
after loaded the page and form with an input type="button" named SEND
$('form.standard [name="SEND"]').click(function(){
var str = $('#sortableTo').serializelist();
formStantardAction('New train inserted.',str);
$('form.standard').submit();
});
all the values reach a php page via POST that made all the things (validating, insert in db, update log...) and answer with 'OK' if all OK (so the form in the modal window is substituted with custom message and fade out) or... if there is an error, php answer with some text that js popups with an alert keeping the modal window open with the form.
It's all ok BUT, if php answer with an error, with second click of button SEND the post is sent 2 times.
And if I make another error on second send, and click again the send button, the post values is sent three time... and so on.
What can I do? Where is my error?
thanks.

Answer 1

Try excluding submit block:
function formStantardAction(correctAnswer,addCustomData){
addCustomData = (typeof addCustomData == "undefined")?'':addCustomData;
correctAnswer = (typeof correctAnswer == "undefined")?'Saved.':correctAnswer;
//$('form.standard').submit(function(event){
// event.preventDefault();
//change 'this' to form.standard
var modalWin = $('form.standard').parent();
var values = $('form.standard').serialize() + addCustomData;
$.ajax({
url: "inc/gateway.php",
data: values,
type: "POST",
success: function(data){
if (data == "OK"){
$(modalWin).html(correctAnswer).delay(500).fadeOut(500);
setTimeout(function() {
mw_close();
}, 1000);
}else{
alert(data);
}
}
});
});
// }
and after loaded page:
$('form.standard [name="SEND"]').click(function(){
var str = $('#sortableTo').serializelist();
formStantardAction('New train inserted.',str);
//excluding submit event
// $('form.standard').submit();
});
Because $.ajax {} with type:"Post" is already a submit process and then when script call submit then it re-submit.
Hope this right and help

Answer 2

Is it possbile that somewhere in your code you bind the submit event to the form everytime you get the data back from the ajax-request?
I can't check this in the code you submitted here.

Answer 3

Create a global variable as flag
var flag = 0;
and check this flag while posting and reset it after completed
function formStantardAction(correctAnswer,addCustomData){
**if(flag == 1){
return false;
}
flag = 1;**
addCustomData = (typeof addCustomData == "undefined")?'':addCustomData;
correctAnswer = (typeof correctAnswer == "undefined")?'Saved.':correctAnswer;
$('form.standard').submit(function(event){
event.preventDefault();
var modalWin = $(this).parent();
var values = $('form.standard').serialize() + addCustomData;
$.ajax({
url: "inc/gateway.php",
data: values,
type: "POST",
success: function(data){
**flag = 0;**
if (data == "OK"){
$(modalWin).html(correctAnswer).delay(500).fadeOut(500);
setTimeout(function() {
mw_close();
}, 1000);
}else{
alert(data);
}
}
});
});
}

Answer 4

I put some custom code at the beginning of your submit function - basically if a submit is in progress nothing should be done, but otherwise return an error message as usual.
var submitting = false; //initialise the variable, this needs to be out of the function!
function formStantardAction(correctAnswer,addCustomData){
addCustomData = (typeof addCustomData == "undefined")?'':addCustomData;
correctAnswer = (typeof correctAnswer == "undefined")?'Saved.':correctAnswer;
$('form.standard').submit(function(event){
if (submitting) {
return false; //if a submit is in progress, prevent further clicks from doing anything
} else {
submitting = true; //no submit in progress, but let's make one now
}
event.preventDefault();
var modalWin = $(this).parent();
var values = $('form.standard').serialize() + addCustomData;
$.ajax({
url: "inc/gateway.php",
data: values,
type: "POST",
success: function(data){
if (data == "OK"){
$(modalWin).html(correctAnswer).delay(500).fadeOut(500);
setTimeout(function() {
mw_close();
}, 1000);
}else{
alert(data);
}
}
});
});
}