Jquery validate depend field

Question

Huy Guys,

I am trying to use jQuery validation plugin and specify that one field is required only when 3 other fields are blank (not filled).

the thing is that the rule is working but it still remain requiring the field even when I type value on it.

Thanks.

This is my code:

$("#ProspectDtlFrm").validate({
 rules: {

  prsptEmail: {
   required: function(element) { return ( $("#prsptHomePhone").val() == '' && $("#prsptBusinessPhone").val() == '' && $("#prsptMobilePhone").val() =='') }                                         
   }    
 },
 messages: {
      prsptEmail: "Please enter your first name"
 }
}); 

Answer 1

You could use depends:

$('#ProspectDtlFrm').validate({ 
    rules: {
        prsptEmail: {
            required: {
                depends: function(element) {
                    return ($('#prsptHomePhone').val() == '' && 
                            $('#prsptBusinessPhone').val() == '' && 
                            $('#prsptMobilePhone').val() == '');
                }
            }
        }    
    }, 
    messages: { 
        prsptEmail: 'Please enter your first name'
    } 
});

Answer 2

The depends clause is still supported. This is from 1.11.0pre version:

normalizeRules: function(rules, element) {
  // handle dependency check
  $.each(rules, function(prop, val) {
    // ignore rule when param is explicitly false, eg. required:false
    if (val === false) {
      delete rules[prop];
      return;
    }
    if (val.param || val.depends) {
      var keepRule = true;
      switch (typeof val.depends) {
        case "string":
          keepRule = !!$(val.depends, element.form).length;
          break;
        case "function":
          keepRule = val.depends.call(element, element);
          break;
      }
      if (keepRule) {
        rules[prop] = val.param !== undefined ? val.param : true;
      } else {
        delete rules[prop];
      }
    }
  });

As you can see, yo can choose between "string" and "function". So you can use:

rules: {
  input_name_here: {
    required: {
      depends: function(element) {
        return $("#thickBoxId:checked").length;
        //or whatever you need to check
      }
    }
  }
}

Or

rules:{
  input_name_here:{
    required: '#tickBoxId:checked'
  }
}

If you only need to test for the existence of something checked.

Answer 3

'depends' seems like it's not supported any more, and, their docs are not up to date.

So in the scenario where if a 'yes' tick box is checked, validate another field:

rules:{
    'name value of area you want to validate':{
        required: '#tickBoxId:checked'
    }
}

Answer 4

the way is depends it's works.

    rules: {
        prsptEmail: {
            required: {
                depends: function(element){
                    if ($('#id-user').val() == '') {
                        return true;
                    } else {
                        return false;
                    }
                }
            }
        },
    },
    messages: {
        prsptEmail : {
            required : "please signIn!",
        }
    },