日期:2014-05-16  浏览次数:20638 次

validationEngine v2.0 结合struts2 ajax验证

validationEngine v2.0进行了重写,变化很大。

?

首先说一下整个表单验证,使用简单的一行代码就能完成:

$("#form.id").validationEngine('validate');

这是我之前用的验证代码:

var success=true;

$(formid+" :text,"+formid+" select,"+formid+" textarea").each(function(i,input){
? if($.validationEngine.loadValidation("#"+$(input).attr('id'))){
? ?success=false;

??}
});

是挨个验证的,当然现在也可以挨个验证:

$("#form.id").validationEngine('validateField', "比如一个INPUT的ID");

?

?

下面是自己使用AJAX验证的一点经验:

?

1.和旧版本一样,也是在域的class属性中添加ajax[XXXX],XXXX是自定义的验证规则。

2.规则与旧版本就有区别了:

"ajaxUserCall": {
??? "url": "ajaxValidateFieldUser",
??? "extraData": "name=eric",
??? "extraDataDynamic": ['#user_id', '#user_email'],
??? "alertText": "* This user is already taken",
??? "alertTextOk": "All good!",
??? "alertTextLoad": "* Validating, please wait"
}

  • url - 这个都懂
  • extraData - 可选的传递参数
  • extraDataDynamic -?可选 DOM id's,其value属性会作为参数传递
  • alertText - 验证错误提示信息
  • alertTextOk - 验证成功提示信息(绿色)
  • alertTextLoad - 验证提交过程中的提示信息

3.接下来这部分是我修改的两处validationEngine源代码,因为我认为这部分不适合使用struts2。

if (!options.isError) {
            	alert(extraDataDynamic);
                $.ajax({
                    type: "GET",
                    url: rule.url,
                    cache: false,
                    dataType: "json",
                    data: "fieldId=" + field.attr("id") + "&fieldValue=" + field.val() + "&extraData=" + extraData + "&" + extraDataDynamic,
                    field: field,
                    rule: rule,
                    methods: methods,
                    options: options,
                    beforeSend: function() {
                        // build the loading prompt
                        var loadingText = rule.alertTextLoad;
                        if (loadingText)
                            methods._showPrompt(field, loadingText, "load", true, options);
                    },
                    error: function(data, transport) {
                        methods._ajaxError(data, transport);
                    },
                    success: function(json) {
                        // asynchronously called on success, data is the json answer from the server
                        var errorFieldId = json.validateReturn[0];
                        var errorField = $($("#" + errorFieldId)[0]);
                        
                        // make sure we found the element
                        if (errorField.length == 1) {
                            var status = json.validateReturn[1];
							// read the optional msg from the server
							var msg = json.validateReturn[2];
                            if (!status) {
                                // Houston we got a problem - display an red prompt
                                options.ajaxValidCache[errorFieldId] = false;
                                options.isError = true;

								// resolve the msg prompt
								if(msg) {
									if (options.allrules[msg]) {
                                    	var txt = options.allrules[msg].alertText;
                                    	if (txt)
                                    		msg = txt;
                                    }
								}
								else
                                    msg = rule.alertText;
                                
								methods._showPrompt(errorField, msg, "", true, options);
                            } else {
                                if (options.ajaxValidCache[errorFieldId] !== undefined)
                                    options.ajaxValidCache[errorFieldId] = true;

                                // resolves the msg prompt
								if(msg) {