c# - MVC Foolproof Validation RequiredIfFalse returning error incorrectly -

c# - MVC Foolproof Validation RequiredIfFalse returning error incorrectly -

i'm using mvc foolproof validation library create dependent requirements:

public bool isrequired { get; set; } [requirediftrue("isrequired", errormessage = "this field required")] public int requirediftrueselectid { get; set; }

this works on client side, allowing me submit form without requirediftrueselectid value (i.e. value 0), on [httppost] modelstate.isvalid returns false, , next result in immediate window:

myviewmodel.isrequired true modelstate["requirediftrueselectid"].errors[0] {system.web.mvc.modelerror} errormessage: "a value required." exception: null

i'm ensuring i'm posting value of requirediftrueselectid (as can see in first immediate window query above). why getting "a value required" message, , how can suppress error?

by way, i'm in mvc5. maybe modelstate implementation has changed since foolproof's lastly update 2 years ago? else know of more recently-published library functions foolproof?

controller method:

[httppost] public virtual actionresult validationtest(testviewmodel vm) { //breakpoint here check modelstate.isvalid homecoming view(vm); }

oh, duh. field value type.

value types required. need create type nullable if want optional.

notice error message not same error message used in validator, that's first clue.

c# asp.net-mvc foolproof-validation