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  • Kasper 13 posts 84 karma points
    Mar 09, 2022 @ 09:59
    Kasper
    0

    How can I identify data type of BlocklistModel in code?

    Using Umbraco And Getting Started
    Umbraco 8

    Is there any way to check the underlying datatype of a blocklist in code? Let's say I have created a blocklist data type and called it fooBlocklist and another one called barBlocklist and added a property to a document type which uses the fooBlocklist.

    When accessing this property in code, I get a BlockListModel, and I can loop through the BlockListItems in the block, but is there any way to determine if the BlockListModel is using the barBlocklist or the fooBlocklist?

    Something like this in pseudo:

    if (model.myBlockListProperty is BlockListModel<fooBlockList>)
{
    //do stuff
}

    So far, my best approach has been to check if all blockitems inside the BlockListModel are of a certain type, because I know I only have one blocklist with this specific configuration of blocks, but this approach doesn't work if the blocklist is empty.

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  • Ambert van Unen 175 posts 817 karma points c-trib
    Mar 10, 2022 @ 22:25
    Ambert van Unen
    0

    but this approach doesn't work if the blocklist is empty.

    You could easily add a 

    if (myBlockList.Any())

    To check if there are any items ofcourse ;-)

    I've been trying this myself aswell, and I think it's not directly possible like you want it. It's probably also the reason Umbraco provides the demo with rendering the items in the blocklist as seperate components:

    @if (Model?.Any() == true)
{
     foreach (var block in Model)
     {
         if (block?.ContentUdi == null) { continue; }
         @(await Component.InvokeAsync(block.Content.ContentType.Alias, block))
     }
 }

    This way you avoid the issue entirely, and always render a component with the correct model.

    However! You could do exactly as Umbraco does but in a switch/case for example:

    switch (blockListItem.Content.ContentType.Alias)
        {
            case LinkItemElement.ModelTypeAlias
                : // do this
            default:
                // else default do this
            break;
        }
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