Add Property to Media Type Programatically

Questions
1

Hi,

I’m attempting to add a new property to the Image media type. Pretty simple, just want to add a Description property I can use for alt text without having to set this up every time.

I’ve done a fair bit with data types and content types so my code feels right but clearly I’m either missing something, or there’s something wrong with the saving of media types.

My code is as follows:

using System.Linq;
using Example.Core.Services.Interfaces;
using Umbraco.Core.Models;
using Umbraco.Core.Services;

namespace Example.Core.Services
{
    public class ConstructMediaTypeService : IConstructMediaTypeService
    {
        #region Services

        private readonly IMediaTypeService _umbracoMediaTypeService;

        private readonly IDataTypeService _dataTypeService;

        #endregion

        #region Constructors

        public ConstructMediaTypeService(IMediaTypeService mediaTypeService, IDataTypeService dataTypeService)
        {
            _umbracoMediaTypeService = mediaTypeService;

            _dataTypeService = dataTypeService;
        }

        #endregion

        #region Initialisation Methods

        public void InitialiseMediaTypes()
        {
            InitialiseImageMediaType();
        }

        private void InitialiseImageMediaType()
        {
            IMediaType imageType = _umbracoMediaTypeService.Get("Image");

            PropertyGroup imagePropertyGroup = imageType.PropertyGroups.First(x => x.Name == "Image");

            IDataType dataType = _dataTypeService.GetDataType("Textstring");

            PropertyType descriptionPropertyType = new PropertyType(dataType);

            descriptionPropertyType.Id = 1249238749;
            descriptionPropertyType.Name = "Description2";
            descriptionPropertyType.Alias = "description2";

            imageType.AddPropertyType(descriptionPropertyType, "Image");

            _umbracoMediaTypeService.Save(imageType);
        }

        #endregion
    }
}

So, kicks on on startup. As I step through the code it all looks correct, I can see the Image property group gets assigned the new property (please see image below). There are no errors thrown but the property just doesn’t display on the media type.

enter image description here
enter image description here1227×600 50.3 KB

Anyone done this successfully or fancy giving it a go and telling me where I’m going wrong?

Thanks,

Ben

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/106096-add-property-to-media-type-programatically