购买表有两个字段purchase_id,其中主键和purchase_order_no是唯一键。我有一个简单的HTML表单。并且有一个字段.i.e purchase_order_no。我想使用jquery或javascript为purchase_order_no字段设置唯一的id验证。那我该怎么做?
答案 0 :(得分:1)
如果这是关于检查数据库中是否唯一,您可能想要使用jQuery $ ajax方法:获取键入的id,将其发送到您检查/验证它的PHP文件,然后在表单中显示结果相同的$ ajax回调方法...
看看this answer ...
您的HTML表单:
<form id="foo">
<label for="bar">The Order No: </label>
<input id="purchase_order_no" name="purchase_order_no" type="text" value="" />
<input type="submit" value="Check Number" />
<p id="result"></p>
</form>
然后你的javascript:
$(document).ready(function(){
$("#foo").submit(function(event) {
$("#foo").attr("disabled","disabled"); // better to disable the submit button during the ajax call...
$.ajax({
url: "tester.php",
type: "post",
data: "number_to_test=".$("#purchase_order_no").val(),
success: function(data) {
if (data == 'ok')
$("#result").html('The Order number is valid');
else if (data == 'no_ok')
$("#result").html('The Order number is not valid');
else
$("#result").html('Error in the returned value');
},
error:function() {
$("#result").html('There is an error somewhere');
}
});
});
});
然后在你的文件tester.php中:
<?php
$numberToTest = $_POST["number_to_test"];
/* here you test what you want, check the database, whatever */
if ($numberToTest == "123") echo "ok";
else echo "not_ok";
?>
答案 1 :(得分:0)
您可以使用jQuery的unique()函数检查值:http://api.jquery.com/jquery.unique/