Client validation for grid inline editing

@{
    var gridId = "DinnersGrid2";
    var initObj = new
    {
        Name = DemoUtils.RndName(),
        Date = DateTime.Now.ToShortDateString(),
        ChefId = Db.Chefs.First().Id,
        MealsIds = Db.Meals.Take(2).Select(o => o.Id).ToArray()
    };        
}
<div class="bar">
    <button type="button" onclick="$('#@gridId').data('api').inlineCreate()" class="awe-btn">Create</button>
    @Html.InlineCreateButtonForGrid(gridId, initObj, "Create with predefined values")
    <button type="button" onclick="$('#@gridId').data('api').batchSave()" class="awe-btn">Save All</button>
    <button type="button" onclick="$('#@gridId').data('api').inlineCancelAll()" class="awe-btn">Cancel All</button>
</div>

@Html.InitDeletePopupForGrid(gridId, "GridInlineEditDemo")

@(Html.Awex().Grid<Dinner>(gridId)
    .Main()
    .ColumnsSelector(false)
    .Mod(o => o.BatchEdit(Url.Action("BatchSave", "GridInlineBatchEditing")))
    .Validation(b =>
        {
            b.Prop("Name", "noAsdf", "Name can't contain asdf");
            b.Prop("Name", "organicNameMinLen", "Name length can't be less than 5 when Organic = yes");
            b.Relate("Organic", "Name"); // when checking Organic Name will also be updated
        },
        type: typeof(DinnerInput))
    .Url(Url.Action("GridGetData", "GridInlineBatchEditing"))
    .Height(350)
    .Groupable(false)
    .Resizable()
    .Attr("data-syncg", "dinner")
    .Columns(b => {
        b.Add(o => o.Id).Width(75)
            .InlHiddenId()                
            .InlVldSummary();

        b.Add(o => o.Name)
            .InlString(new TextBoxOpt { ClearBtn = true });

        b.Add(o => o.Date).Width(160)
            .InlDate();

        b.Add(o => new {o.Chef.FirstName, o.Chef.LastName}).MinWidth(170)
            .InlDropdownList(new DropdownListOpt { Name = "ChefId", Url = Url.Action("GetChefs", "Data") });

        b.Add(o => o.Meals.Select(m => m.Name)).MinWidth(250).Grow(2)
            .InlMultiselect(new MultiselectOpt
        {
            Name = "MealsIds",
            Url = Url.Action("GetMealsImg", "Data")
        }
            .ImgItem());

        b.Add(o => o.BonusMeal.Name).Header("Bonus Meal")
            .InlDropdownList(new DropdownListOpt
        {
            Name = "BonusMealId",
            Url = Url.Action("GetMealsImg", "Data")
        }.ImgItem());

        b.Add(o => o.Organic).Width(90)
            .Inl(Html.Awe().Toggle(new ToggleOpt{ Name = "Organic"}));

        b.Add(Html.InlEditDelColumn(gridId));
    })
)
<script>
    function noAsdf(o) {
        return o.v.indexOf('asdf') !== -1;
    }

    function organicNameMinLen(o) {
        var row = $(o.input).closest('.awe-row');
        var org = row.find('[name="Organic"]');
        var name = row.find('[name="Name"]');

        if (org.val() === 'true') {
            return (name.val().length < 5);
        }
    }
</script>

public class GridInlineBatchEditingController : Controller
{
    public IActionResult Index()
    {
        return View();
    }

    public IActionResult GridGetData(GridParams g, string search)
    {
        var gmb = new GridModelBuilder<Dinner>(Db.Dinners.AsQueryable(), g)
        {
            KeyProp = o => o.Id, // needed for api select, update, tree, nesting, EF     
        };

        gmb.FilterContainsStr(o => o.Name, search);

        gmb.Prop(o => o.Meals.Select(m => m.Name), "Meals");
        gmb.Prop(o => o.Organic, "DispOrganic", o => o ? "Yes" : "No");

        // props used for inline editing controls values
        gmb.PropVal(o => o.Meals.Select(m => m.Id), "MealsIds", o => o);
        gmb.PropVal(o => o.Chef.Id, "ChefId");
        gmb.PropVal(o => o.BonusMeal.Id, "BonusMealId");

        return this.AweJson(gmb.Build());
    }

    [HttpPost]
    public IActionResult BatchSave(DinnerInput[] inputs)
    {
        var res = new List<object>();

        foreach (var input in inputs)
        {
            var vldState = ModelUtil.Validate(input);

            // custom validation example
            if (input.Name != null && input.Name.Contains("aaa"))
            {
                vldState.Add("Name", "Name can't contain aaa");
            }

            if (vldState.IsValid())
            {
                try
                {
                    var isCreate = !input.Id.HasValue;

                    var ent = isCreate ? new Dinner() :
                        Db.Dinners.First(o => o.Id == input.Id);

                    ent.Name = input.Name;
                    ent.Date = input.Date.Value;
                    ent.Chef = Db.Find<Chef>(input.ChefId);

                    // ToList req for EF
                    ent.Meals = Db.Meals
                        .Where(o => input.MealsIds.Contains(o.Id)).ToList();

                    ent.BonusMeal = Db.Find<Meal>(input.BonusMealId);
                    ent.Organic = input.Organic ?? false;

                    if (isCreate)
                    {
                        Db.Add(ent);
                    }

                    res.Add(new { });
                }
                catch (Exception ex)
                {
                    vldState.Add("Name", ex.Message);
                }
            }

            if (!vldState.IsValid())
            {
                res.Add(vldState.ToInlineErrors());
            }
        }


        return Json(res);
    }

    public IActionResult Delete(int id)
    {
        var dinner = Db.Find<Dinner>(id);

        return PartialView(new DeleteConfirmInput
        {
            Id = id,
            Type = nameof(Dinner).ToLower(),
            Name = dinner.Name
        });
    }

    [HttpPost]
    public IActionResult Delete(DeleteConfirmInput input)
    {
        Db.Remove(Db.Find<Dinner>(input.Id));

        // the PopupForm's success function aweUtils.itemDeleted expects an obj with "Id" property
        return Json(new { input.Id });
    }
}