我有一个从jquery函数生成的动态输入字段。可以通过按钮单击这些输入字段来添加或删除。这些字段填充了mysql表中的数据。每个填充的输入都具有从DB获取的唯一ID。添加新字段时,我将从ajax请求中获取下一个AUTO_INCREMENT
。然后我可以增加+1但是对于所有字段。我只想为新字段做这个。如果由于某种原因,从另一个应用程序进行插入查询事务,它将更新start increment from
字段,然后使用正确的值更新其余部分(检查我的意思是jsFiddle(http://jsfiddle.net/f9XP8/2/)。
问题是如何把它们放在一起。我只想跟随能够添加一个新字段并为db插入分配适当的下一个person_id
。 LIVE EXAMPLE
<script>
$(document).ready(function () {
var $increment_num = $('#increment_num');
var interval = 100; //3000 = 3 seconds
function doAjax() {
$.ajax({
type: 'POST',
url: 'personAutoIncrement.php',
data: $(this).serialize(),
dataType: 'json',
success: function (data) {
var $cloned = $('#input_table tr');
var num = parseInt(data);
$increment_num.val(num);
$cloned.each(function(i){
$(this).find('[name^="increment_id"]').first().val(num+i);
})
},
complete: function (data) {
// Schedule the next
setTimeout(doAjax, interval);
}
});
}
setTimeout(doAjax, interval);
var click_count = 0;
$('#btnAdd').click(function () {
click_count++;
var $clones = $('#input_table tr'),
num = $clones.size() + 1,
next_num = parseInt($clones.last().find('input[name^="increment_id"]').val()) + 1,
$template = $clones.first(),
newSection = $template.clone().attr('id', 'pq_entry_'+num),
ident = 'increment_id_'+num;
person_id = 'person_id_'+num;
person_fname = 'person_fname_'+num;
person_lname = 'person_lname_'+num;
// clear out all sections of new input
newSection.find('input').not('[name^="increment_id"]').val('');
newSection.find('input[name^="increment_id"]').attr({
'id': ident,
'name': ident
}).val(/*next_num*/);
newSection.find('input[name^="person_id"]').attr({
'id': person_id,
'name': person_id
}).val(/*next_num*/);
newSection.find('input[name^="person_fname"]').attr({
'id': person_fname,
'name': person_fname
}).val(/*next_num*/);
$('#input_table').append(newSection);
$('#btnDel').prop('disabled', '');
if (num == 100) $('#btnAdd').prop('disabled', 'disabled');
});
$('#btnDel').click(function () {
var num = $('.clonedSection').length; // how many duplicate input fields we currently have
$('#pq_entry_' + num).remove(); // remove the last element
// enable the "add" button
$('#btnAdd').prop('disabled', '');
// if only one element remains, disable the "remove" button
if (num - 1 == 1) $('#btnDel').prop('disabled', 'disabled');
});
$('#btnDel').prop('disabled', 'disabled');
});
</script>
HTML
<table>
<thead>
<tr>
<th>ID from DB</th>
<th>First Name</th>
</tr>
</thead>
<tbody id="input_table">
<tr id="pq_entry_1">
<td><input type="text" id="increment_id_1" name="increment_id_1" readonly value="5" /></td>
<td><input type="text" name="first_name" placeholder="First Name" /></td>
</tr>
</tbody>
</table>
<input type='button' id='btnAdd' value='add text box' />
<input type='button' id='btnDel' value='Delete' /></br>
</table>
答案 0 :(得分:4)
如果我没有弄错,你想要知道如何增加某些行,但允许其他行“冻结”(因为它们被保存到数据库中)。我已经更改了你的代码,这里有重要的注意事项:
tr.find('input[name="person_id"]')
data-saved
添加了tr
属性,以了解它是否应包含在更新的auto increment id
中,或者是否应该保持原样data-saved
属性,如果需要,可以添加一个AJAX调用来保存记录Javascript:
$(document).ready(function () {
var $increment_num = $('#increment_num');
var interval = 5000; //3000 = 3 seconds
function doAjax() {
$.ajax({
type: 'POST',
url: 'personAutoIncrement.php',
data: $(this).serialize(),
dataType: 'json',
success: function (data) {
var $cloned = $('#input_table tr').not('[data-saved]');
var num = parseInt(data);
$increment_num.val(num);
$cloned.each(function(i){
var $this = $(this);
$this.find('[name^="person_id"]').first().val(num+i);
})
},
complete: function (data) {
// Schedule the next
setTimeout(doAjax, interval);
}
});
}
setTimeout(doAjax, interval);
var click_count = 0;
$('#btnAdd').click(function () {
click_count++;
var $clones = $('#input_table tr'),
num = $clones.size() + 1,
next_num = parseInt($clones.last().find('input[name^="person_id"]').val()) + 1,
$template = $clones.first(),
newSection = $template.clone().attr('id', 'pq_entry_'+num),
person_id = 'person_id_'+num;
person_fname = 'person_fname_'+num;
person_lname = 'person_lname_'+num;
newSection.removeAttr('data-saved');
// clear out all sections of new input
newSection.find('input[type="text"]').val('');
newSection.find('input[name^="person_id"]').attr({
'id': person_id
}).val(next_num);
newSection.find('input[name^="person_fname"]').attr({
'id': person_fname
});
newSection.find('input[type="button"]').attr('data-ident', next_num);
$('#input_table').append(newSection);
$('#btnDel').prop('disabled', '');
if (num == 100) $('#btnAdd').prop('disabled', 'disabled');
});
$('.save-button').click(function(){
var $parent = $(this).parents('.clonedSection')
var id = $parent.find('input[name="person_id"]').val();
// do whatever else here, save to db
$parent.attr('data-saved', '1');
})
$('#btnDel').click(function () {
var num = $('.clonedSection').length; // how many duplicate input fields we currently have
$('#pq_entry_' + num).remove(); // remove the last element
// enable the "add" button
$('#btnAdd').prop('disabled', '');
// if only one element remains, disable the "remove" button
if (num - 1 == 1) $('#btnDel').prop('disabled', 'disabled');
});
$('#btnDel').prop('disabled', 'disabled');
});
HTML:
<form>
<strong>Start Increment from Next ID to be inserted in the DB:</strong><input id="increment_num" name="increment_num" type="text" /></br>
<table>
<thead>
<tr><th>ID from DB</th><th></th>
<th>First Name</th></tr>
</thead>
<tbody id="input_table" >
<tr id="pq_entry_1" class="clonedSection" data-saved="1">
<td><input type="text" name="person_id" value='1' readonly /></td>
<td><input id="person_fname_1" name="person_fname" placeholder=" First Name" type="text" value='James'/></td>
<td><input type="button" class="save-button" value="Save" />
</tr>
<tr id="pq_entry_2" class="clonedSection" >
<td><input type="text" name="person_id" value='2' readonly /></td>
<td><input id="person_fname_2" name="person_fname" placeholder=" First Name" type="text" value='Cynthia'/></td>
<td><input type="button" class="save-button" value="Save" />
</tr>
</tbody>
</table>
<input type='button' id='btnAdd' value='add another Person' />
<input type='button' id='btnDel' value='Delete' /></br>
</form>
说完所有这些之后,我可能会通过隐藏元素来解决这个问题:
<input type="hidden" name="person_id" value="1" />
生成新行时无效:
<input type="hidden" name="person_id" value="" />
然后在我的PHP中,我将允许MySQL以这样的方式处理自动递增id:
<?php
$params = $_POST;
if(is_numeric($params['person_id'])){
$sql = sprintf('UPDATE person SET fname = "%s", lname = "%s" WHERE person_id = %u LIMIT 1',
mysql_real_escape_string($params['fname']),
mysql_real_escape_string($params['lname']),
intval($params['person_id'])
);
} else {
// the NULL tells MySQL to select the correct next increment id automatically
$sql = sprintf('INSERT INTO person (id, fname, lname) VALUES (NULL, "%s", "%s")',
mysql_real_escape_string($params['fname']),
mysql_real_escape_string($params['lname']);
);
}
?>