表单提交由ajax捕获并导致无限循环

I have a question in ajax and html forms, And i need your helps please.

我在ajax和html表单中有一个问题,我需要你的帮助。

I'm using PARSLEY validation (http://parsleyjs.org/) for validation rules. But the probleme is that validation doesn't support the database validations : for instant, i have to check if the field 'nom' already exist in database or no, if exist (show a message) and if don't exist submit the form to myaction.php.

我正在使用PARSLEY验证(http://parsleyjs.org/)来验证规则。但问题是验证不支持数据库验证:对于即时,我必须检查字段'nom'是否已存在于数据库中或否,如果存在(显示消息)并且如果不存在则提交表单到myaction.php。

My ajax script :

我的ajax脚本:

<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 :

我的HTML格式:

<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 and 1 if exist

ajax.php:如果数据库中不存在字段则返回0,如果存在,则返回1

The probleme i face is that the ajax called in a loop. in each time the form submited and call the ajax. what i want is if data equal 0 (field doesn't exist in database) the form must be submited to myaction.php

我面临的问题是ajax在循环中调用。在每次提交表单并调用ajax时。我想要的是如果数据等于0(数据库中不存在字段),则必须将表单提交给myaction.php

1 个解决方案

#1

Here is one solution.

这是一个解决方案。

Basically you're submitting and handling the submision forever. You need to break that when the data has been validated. Since you only care about nom, set some flag on it so you can check whenever you're submitting

基本上你是在永久地提交和处理该项目。在验证数据后,您需要打破它。由于您只关心nom,因此请在其上设置一些标记,以便您可以在提交时进行检查

$(document).ready(function () {
    $("form").submit(function (e) {
        var nom = $('#nom');
        var valid = nom.data('valid');

        if (valid === 0) { // Is valid, let's continue
          return;
        } else { // Valid is undefined as was 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);
                  }
              }
          });
        }                
    });
});