public override async Task <IDisplayResult> EditAsync(ContentItem model, IUpdateModel updater)
{
// This method can get called when a new content item is created, at that point
// the query string contains a CrossReferencePart.ContainerId value, or when an
// existing content item has ContainedPart value. In both cases the hidden field
// needs to be rendered in the edit form to maintain the relationship with the parent.
if (model.As <CrossReferencedPart>() != null)
{
return(BuildViewModel(model.As <CrossReferencedPart>().SourceContentItemId, model.As <CrossReferencedPart>().Relation, model.ContentType));
}
var viewModel = new EditCrossReferencedPartViewModel();
if (await updater.TryUpdateModelAsync(viewModel, nameof(CrossReferencePart)) && viewModel.ContainerId != null && viewModel.Relation != null && viewModel.ContentType == model.ContentType)
{
// We are creating a content item that needs to be added to a container
// so we render the container id as part of the form, the content type,
// and the enable ordering setting.
// The content type must be included to prevent any contained items,
// such as widgets, from also having a ContainedPart shape built for them.
return(BuildViewModel(viewModel.ContainerId, model.ContentType, viewModel.Relation));
}
return(null);
}
public override async Task <IDisplayResult> UpdateAsync(ContentItem model, IUpdateModel updater)
{
var viewModel = new EditCrossReferencedPartViewModel();
// The content type must match the value provided in the query string
// in order for the ContainedPart to be included on the Content Item.
if (await updater.TryUpdateModelAsync(viewModel, nameof(CrossReferencePart)) && viewModel.ContainerId != null && viewModel.Relation != null && viewModel.ContentType == model.ContentType)
{
model.Alter <CrossReferencedPart>(x =>
{
x.SourceContentItemId = viewModel.ContainerId;
x.Relation = viewModel.Relation;
});
}
return(await EditAsync(model, updater));
}
