通过使用php文件调用AJAX，将数据插入mysql。在执行insert语句之前，php代码执行select查询以查找重复记录并继续执行insert statement。
问题: 从ajax调用php文件时，它会执行两次，并且得到重复记录的响应。
好的，我尝试使用error_log从插入函数中进行调用，结果它被调用了两次。
表单验证的触发点
$("#load-modal").on("click","#addcountryformsubmitbtn",function(e){
e.preventDefault();
var $form = $("#addcountryform"), $url = $form.attr('action');
$form.submit();
});
这是表单在验证后提交的方式：
}).on('success.form.bv', function(e){
e.preventDefault();
var $form = $("#addcountryform"), $url = $form.attr('action');
$.post($url,$form.serialize()).done(function(dte){ $("#load-modal").html(dte); });
});
使用bootstrapvalidator、Core PHP、mysqli和Chrome浏览器进行开发。
实际的JS代码：
$(document).ready(function() {
$php_self_country="<?php echo $_SERVER['PHP_SELF']."?pg=countrycontent"; ?>";
$("#country-content").load($php_self_country,loadfunctions);
$("#country-content").on( "click", ".pagination a", function (e){
e.preventDefault();
$("#country-loading-div").show();
var page = $(this).attr("data-page");
$("#country-content").load($php_self_country,{"page":page}, function(){
$("#country-loading-div").hide();
loadfunctions();
});
});
$("#country-content").on("click","#closebtn",function(e){
e.preventDefault();
$("#country-content").load($php_self_country,loadfunctions);
});
});
function loadfunctions(){
$("[data-toggle='tooltip']").tooltip();
$("#country-content").on("click","#addcountrybtn, #addcountrylargebtn",function(e){
e.preventDefault();
$.ajax({
url: $php_self_country,
type: "POST",
data: { 'addcountry':'Y' },
dataType: "html",
cache: false
}).done(function(msg){
$("#load-modal").html(msg);
$("#load-modal").modal('show');
$('input[type="radio"]').iCheck({ checkboxClass: 'icheckbox_minimal', radioClass: 'iradio_minimal' });
modalvalidation();
}).fail(function() {
$("#load-modal").html( "Request Failed. Please Try Again Later." );
});
});
$("#country-content").on("click",".tools a",function(e){
e.preventDefault();
var recordid = $(this).attr("record-id");
$.ajax({
url: $php_self_country,
type: "POST",
data: { 'modifycountry':recordid },
dataType: "html",
cache: false
}).done(function(msg){
$("#load-modal").html(msg);
$("#load-modal").modal('show');
$('input[type="radio"]').iCheck({ checkboxClass: 'icheckbox_minimal', radioClass: 'iradio_minimal' });
modalvalidation();
}).fail(function() {
$("#load-modal").html( "Request Failed. Please Try Again Later." );
});
});
$("#load-modal").on("click","#addcountryformsubmitbtn",function(e){
e.preventDefault();
var $form = $("#addcountryform"), $url = $form.attr('action');
$form.submit();
});
$("#load-modal").on("hide.bs.modal", function () {
window.location.href=$php_self_country_pg;
});
}
function modalvalidation(){
$('#addcountryform').bootstrapValidator({
message: 'This value is not valid',
feedbackIcons: {
valid: 'glyphicon glyphicon-ok',
invalid: 'glyphicon glyphicon-remove',
validating: 'glyphicon glyphicon-refresh'
},
fields: {
[-------Validation part comes here----------]
}
}).on('success.form.bv', function(e){
e.preventDefault();
var $form = $("#addcountryform"), $url = $form.attr('action');
$.post($url,$form.serialize()).done(function(dte){ $("#load-modal").html(dte); });
});
}
HTML
这段 HTML 代码是通过按钮点击事件 addcountrybtn，利用 AJAX 技术并写入到基础 HTML 文件中的 load-modal div 中。
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4 class="modal-title"><i class="fa fa-exchange"></i> <?php echo COUNTRYLABEL; ?></h4>
</div>
<div class="modal-body">
<form role="form" method="POST" action="self.php" name="addcountryform" id="addcountryform" class="form-horizontal">
<div class="form-group">
<div class="col-xs-3">
<label for="countryname" class="pull-right">Country Name</label>
</div>
<div class="col-xs-9">
<div class="lnbrd">
<input type="text" class="form-control" name="countryname" placeholder="Enter Country Name">
</div>
</div>
</div>
<div class="form-group">
<div class="col-xs-3">
<label for="crncyname" class="pull-right">Currency Name</label>
</div>
<div class="col-xs-9">
<div class="lnbrd">
<input type="text" class="form-control" name="crncyname" placeholder="Enter Currency Name">
</div>
</div>
</div>
<div class="form-group">
<div class="col-xs-3">
<label for="crncycode" class="pull-right">Currency Code</label>
</div>
<div class="col-xs-9">
<div class="lnbrd">
<input type="text" class="form-control" name="crncycode" placeholder="Enter Currency Code">
</div>
</div>
</div>
<div class="form-group">
<div class="col-xs-3">
<label for="forrate" class="pull-right">Foreign Currency Rate<?php echo isset($icon)?$icon:''; ?></label>
</div>
<div class="col-xs-9">
<div class="lnbrd">
<input type="text" class="form-control" name="forrate" placeholder="Enter Foreign Currency Rate.">
</div>
</div>
</div>
<div class="form-group">
<div class="col-xs-3">
<label for="taxpercent" class="pull-right">Tax %</label>
</div>
<div class="col-xs-9">
<div class="lnbrd">
<input type="text" class="form-control" name="taxpercent" placeholder="Enter Tax Percentage">
</div>
</div>
</div>
</form>
</div>
<div class="modal-footer clearfix">
<button type="button" class="btn btn-danger pull-right" id="addcountryformsubmitbtn">Add</button>
</div>
</div>
注意：从数据库角度来看，代码的工作符合预期。
#addcountryformsubmitbtn的 HTML 代码吗？请检查它是否有type="button"属性。 - sp00mtype="button"和type="submit"，输出仍然相同。 - Syed Nizamudeen