Ignore model property on post to action

[Sebastian]

Is there a way to ignore a model property when posting to an action from a grid? Delete, create, update etc. The property needs to be loaded with the grid in the read action but not posted to the delete, create and update actions.

[Viktor Tachev]

Hello Sebastian,

By default the entire Model will be submitted to the server when updating/creating/deleting an item. However, if you would like to prevent the users from editing a specific field you can configure the Editable setting for it in the DataSource Model configuration. The code would look similar to the following:

.DataSource(dataSource => dataSource
    .Ajax()
    .Model(model => {
        model.Id(p => p.ProductID);
        model.Field(p => p.ProductID).Editable(false);
        model.Field(p => p.UnitPrice).Editable(false);
    })
    .PageSize(20)
    .Create(update => update.Action("CreateAction", "Controller"))
    .Read(read => read.Action("ReadAction", "Controller"))
    .Update(update => update.Action("UpdateAction", "Controller"))
    .Destroy(update => update.Action("DestroyAction", "Controller"))
)

Let me know how this approach works for you.


Regards,
Viktor Tachev
Progress Telerik

[Eli]

If the field is a complex object how would you keep it from being submitted to server or have it ignored?  This type of data displays fine and I am able to update, however, if I add Create to the Grid it throws an "Uncaught ReferenceError: CreatedBy is not defined"  I have tried a few ways to do this without any luck.  The Add New Record button will not work.  If I comment out the field it all works correctly.  I only want this nested field for Read Display.

For instance if you have 

.Columns(columns =>
            {
                columns.Bound(c => c.CreatedBy.DisplayName);
}

.Model(model =>
                {
                    model.Field(c => c.CreatedBy.DisplayName).Editable(false);
}

[Viktor Tachev]

Hi Eli,

When creating a new item in the Grid the respective editors would be populated with the defailt value for each field. However, when a field is an object the editor has no way of knowing what value should be applied to it. 

In this case you can specify a default value for the field in the Schema Model configuration. The custom editor example below has a default value specified for the Category field.

• ​https://demos.telerik.com/aspnet-mvc/grid/editing-custom

Regards,
Viktor Tachev
Progress Telerik

[Eli]

Thanks Viktor, this helped me get it worked out.