[英]Dynamic form field validation using jquery AND Rules
這個問題是我的SO問題的延伸:
jQuery根據循環內選擇的單選按鈕禁用/啟用textarea
我正在使用jQuery bassistance驗證插件( http://bassistance.de/jquery-plugins/jquery-plugin-validation/ )。
我試圖創建的驗證規則是,如果單選按鈕等於“是”,則將textarea設為必填字段。 收音機和textarea框的我的ID和表單字段名稱是動態的,但以相同的單詞開頭,所以我可以使用name^='travel'
HTML 更新
<div class="controls">
<label class="radio inline">
<input type="radio" name="travel_1" data-travelNumber="1" id="travel_yes_1" value="Yes" tabindex="25" >
Yes </label>
<label class="radio inline">
<input name="travel_1" type="radio" data-travelNumber="1" id="travel_no_1" value="No" tabindex="26" checked >
No </label>
</div>
<div class="controls" id="Answer_travel_yes_1">
<textarea name="travelDetails_1" id="travelDetails_1" ></textarea>
</div>
<div class="controls">
<label class="radio inline">
<input type="radio" name="travel_2" data-travelNumber="2" id="travel_yes_2" value="Yes" tabindex="25" >
Yes </label>
<label class="radio inline">
<input name="travel_2" type="radio" data-travelNumber="2" id="travel_no_2" value="No" tabindex="26" checked >
No </label>
</div>
<div class="controls" id="Answer_travel_yes_2">
<textarea name="travelDetails_2" id="travelDetails_2"></textarea>
</div>
<div class="controls">
<label class="radio inline">
<input type="radio" name="travel_3" data-travelNumber="3" id="travel_yes_3" value="Yes" tabindex="25" >
Yes </label>
<label class="radio inline">
<input name="travel_3" type="radio" data-travelNumber="3" id="travel_no_3" value="No" tabindex="26" checked >
No </label>
</div>
<div class="controls" id="Answer_travel_yes_3">
<textarea name="travelDetails_3" id="travelDetails_3"></textarea>
</div>
jQuery的
// I use this to hide/show the travelDetails textarea (show on yes, hide on no)
$('input:radio[name^="travel"]:checked').live('click',function(){
var id = $(this).attr("id").split("_");
id = id[id.length-1];
$("#travelDetails_" + id).attr("disabled", !($(this).val() == "Yes"));
if ( $(this).val() == 'Yes' )
$('#Answer_travel_yes_' + id).slideDown();
else
$('#Answer_travel_yes_' + id).slideUp();
});
$("#TravelForm").validate({
rules:{
whatgoeshere:{
required: function(){
if ( $("input:radio[name^=travel]:checked").val() == "Yes" ){
// make travel
true
}
else{
console.log('false');
true
}
},
minlength: 10 // needs to have at least 10 characters entered (if the corresponding radio is Yes
}
},
messages:{
whatgoeshere:{
required:"Please enter your travel details",
minlength:"Please enter at least 10 characters"
}
},
errorClass: "help-inline",
errorElement: "span",
highlight:function(element, errorClass, validClass) {
$(element).parents('.control-group').addClass('error');
},
unhighlight: function(element, errorClass, validClass) {
$(element).parents('.control-group').removeClass('error');
// $(element).parents('.control-group').addClass('success');
}
});
這是一個通用答案,您可以將其應用到您的代碼中......
我相當肯定你不能在rules
選項中使用一個函數。 根據文檔 , rules:
需要是“鍵/值對”,除非使用depends
屬性。
rules: {
mytextarea: {
minlength: 10,
required: {
depends: function(element) {
return $("#myradio:checked")
}
}
}
},
messages: {
mytextarea: {
required: "Please enter your travel details",
minlength: "Please enter at least 10 characters"
}
}
mytextarea
將是textarea
的name
屬性的value
。
<textarea name="mytextarea"></textarea>
另外...
動態應用jQuery .validate()
規則。
首先使用選項初始化.validate()
插件:
$('form').validate({
// your options, leave out the rule in question
});
創建規則數組(注意使用messages
時格式略有不同):
var myrule = {
required: true,
minlength: 10,
messages: {
required: "Please enter your travel details",
minlength: "Please enter at least 10 characters"
}
}
然后在條件內,根據需要定位textarea
:
if ($(this).val() == 'Yes') {
$('[name^="travel"]').rules('add', myrule);
} else {
$('[name^="travel"]').rules('remove', myrule);
}
http://docs.jquery.com/Plugins/Validation/rules#.22add.22rules
BTW, .live()
已被棄用,轉而使用.on()
。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.