如果用户未选中复选框或单选按钮，如何为复选框或单选按钮设置一些默认值

Question

I have a dynamically generated form using bootstrap form elements , in which I have options to add check boxes and radio buttons. When I click the submit button, the data in the form is sent to the database as json. I am using the following javascript function for form submission

$('#customForm').on("submit",function(event){
        var formData = JSON.stringify($("#customForm").serializeArray());


        var formURL = $(this).attr("action");

        $.ajax({
            url : formURL,
            type: "POST",
            data : formData,
            contentType : "application/json; charset=utf-8",

            success:function(data)
            {
            $("#myAlert").show();
            },

            failure:function(error)
            {
            } 
        });
        event.preventDefault();

    });

The problem is that , whenever the check box is left unchecked or no option is selected for the radio button, no data is send to the database corresponding to these fields.

Is there any way that I can use to set some default value for these form fields so that I get some value in the database for these fields even if the fields are not selected.

Answer 1

除了Marc B的注释，您还可以在数据库中为通常使用复选框进行不同设置的字段设置默认值。