Cacher is the code snippet organizer for pro developers

<ng-input-text model="someModel" property-name="name" />

<input class="custom-input-text" type="text" ng-disabled="!model.isEditingEnabled" ng-model="model[propertyName]"/>
<small ng-if="validationMessage()" class="error">{{validationMessage()}}</small>

"use strict";

// Taken from here: http://stackoverflow.com/a/18295416/413785
MyApp.Common
    .directive("ngInputText", MyAppNgInputTextDirective);

function MyAppNgInputTextDirective() {
    return {
        restrict: "E",
        scope: {
            model: "=",
            propertyName: "@"
        },
        controller: MyAppNgInputTextCtrl,
        templateUrl: "/app/modules/common/directives/form-elements/input-text.html"
    };
}

MyAppNgInputTextCtrl.$inject = ["$scope"];
function MyAppNgInputTextCtrl($scope) {
    var modelStatePropertyName = getModelStateProperty($scope.propertyName);
    var watchItem = "model." + $scope.propertyName;

    // If the value is changed, remove modelState error
    $scope.$watch(watchItem, function () {
        resetModelState();
    });

    $scope.validationMessage = function () {
        if ($scope.model.modelState && $scope.model.modelState[modelStatePropertyName]) {
            return $scope.model.modelState[modelStatePropertyName][0];
        }
        return "";
    }

    // Resolves modelState property name for the current model
    // (by .net convention it looks something like this: "model.SomeProperty")
    function getModelStateProperty(modelStatePropertyName) {
        return "model." + modelStatePropertyName.charAt(0).toUpperCase() + modelStatePropertyName.slice(1);
    }

    function resetModelState() {
        if ($scope.model.modelState)
            $scope.model.modelState[modelStatePropertyName] = undefined;
    }
}

using System.Net;
using System.Net.Http;
using System.Web.Http.Filters;
using System.Web.Http.Controllers;

namespace SomeNamespace.Web.Infrastructure.Filters
{
    /// <summary>
    /// This action attribute will throw 422 - Unprocessable entity in case model was not validated.
    /// <see href="http://stackoverflow.com/questions/11686690/handle-modelstate-validation-in-asp-net-web-api"/>
    /// <seealso href="http://stackoverflow.com/a/3291292/413785"/>
    /// </summary>
    public class ValidationFilter : ActionFilterAttribute
    {
        public override void OnActionExecuting(HttpActionContext actionContext)
        {
            var modelState = actionContext.ModelState;

            if (!modelState.IsValid)
            {
                actionContext.Response = actionContext.Request.CreateErrorResponse((HttpStatusCode)422, modelState);
            }

            //base.OnActionExecuting(actionContext);
        }
    }
}

[ValidationFilter]
public IHttpActionResult PostMetadataType(MetadataTypeModel model)
{
    var type = _metadataService.CreateMetadataType(model.ValueTypeId, model.Name);
    model = MetadataTypeMapper.MapToModel(type);

    return Ok(model);
}

public class MetadataTypeModel
{
    public int Id { get; set; }

    [Range(1, int.MaxValue, ErrorMessage = "Value type Id must be greater than 0.")]
    public int ValueTypeId { get; set; }

    [Required]
    public string Name { get; set; }
}