jquery - Form submit catched by ajax and result an infinity loop -

i have question in ajax , html forms, , need helps please.

i'm using parsley validation (http://parsleyjs.org/) validation rules. probleme validation doesn't support database validations : instant, have check if field 'nom' exist in database or no, if exist (show message) , if don't exist submit form myaction.php.

my ajax script :

<script> $(document).ready(function () {     $("form").submit(function (e) {         e.preventdefault(); //prevent default form submit         var nom = $("#nom").val();         $.ajax({             type: "post",             url: 'ajax.php',             data:  "field="+ nom ,             success: function (data) {                 if(data==1){                     alert(data);                 }else if(data==0){                     cache: false                     $('form#form_id').submit();                 }             },         });     }); }); </script> 

my html form :

<form action="myaction.php" method="post" name="form_name" id="form_id">     <input type="text" id="nom" name="nom" required value="">     <input type="text" id="prenom" name="prenom" required value="">     <input type="text" id="remarque" name="remarque" required value=""> </form> 

ajax.php : return 0 if field doesn't exist in database , 1 if exist

the probleme face ajax called in loop. in each time form submited , call ajax. want if data equal 0 (field doesn't exist in database) form must submited myaction.php

here 1 solution.

basically you're submitting , handling submision forever. need break when data has been validated. since care nom, set flag on can check whenever you're submitting

$(document).ready(function () {     $("form").submit(function (e) {         var nom = $('#nom');         var valid = nom.data('valid');          if (valid === 0) { // valid, let's continue           return;         } else { // valid undefined never set           e.preventdefault(); //prevent default form submit            $.ajax({               type: "post",               url: 'ajax.php',               data:  "field="+ nom.val() ,               success: function (data) {                                   if(data==1) {                       alert(data);                   } else if(data==0) {                     nom.data('valid', 0);                   }               }           });         }                     }); });