javascript - jQuery一次调用验证远程解析两个字段吗？

目前，我正在尝试通过jQuerys验证插件来解析两个值，以对照SQL数据库进行检查。我可以看到DateReceived已正确解析，但是CentreID始终显示为null。

这是我当前的代码：

var centreID = $( '#CentreSelect' ).val();
    $("#submit-form").validate({
        rules: {
            DateReceived:{
                required: true,
                remote:{
                    url: "url.php?CentreID=" + centreID,
                    type: "GET"
                    }
                },
            },
        messages: {
            DateReceived: {
                    remote: "Error - Centre already entered on that date"
                    }
            }
    });
});

一个建议将不胜感激。

最佳答案

你需要

$("#submit-form").validate({
    rules: {
        DateReceived: {
            required: true,
            remote: {
                url: "url.php?CentreID=" + centreID,
                data: {
                    CentreID: function () {
                        //you need to read this value when the validation is executed, so pass the value as a function which will be called
                        return $('#CentreSelect').val()
                    }
                }
                type: "GET"
            }
        },
    },
    messages: {
        DateReceived: {
            remote: "Error - Centre already entered on that date"
        }
    }
});