v15: New navigation query API, no way to get all content of a specific type with hitting DB

[arknu]

I occasionally used IPublishedContentCache like this to find content of a specific type:

var content = UmbracoContext.Content?.GetByContentType(UmbracoContext.Content.GetContentType("test"))

This uses the cache and does not hit the DB

IDocumentNavigationQueryService in v15 does not have a method that does this. I would have expected something like TryGetContentKeysOfType to exist, but it does not.
IDocumentCacheService does have a GetByContentType method, but that now hits the DB.

Am I missing something here or is this intentional? If so, I find it a bit strange. I can get all kinds of other content from IDocumentNavigationQueryService, just not all content of a specific type, not matter where it is located in the tree.

Yes, much of the time I'll probably have a root node, in which case this is no problem, but it seems strange to go backwards like this...

[bergmania]

I agree with you. IDocumentNavigationQueryService should be able to delivery the data in TryGetContentKeysOfType without any DB lookups.

Until it is available, I guess you can work with an extension method like this

public static class NavigationQueryServiceExtensions
{
    public static bool TryGetContentKeysOfType(this INavigationQueryService navigationQueryService, string contentTypeAlias, out IEnumerable<Guid> contentKeys)
    {
        var result = new List<Guid>();
        
        //Add Roots of type
        if (navigationQueryService.TryGetRootKeysOfType(contentTypeAlias, out IEnumerable<Guid> keys))
        {
            result.AddRange(keys);
        }
        
        //Add Descendants of type
        if (navigationQueryService.TryGetRootKeys(out IEnumerable<Guid> rootKeys))
        {
            foreach (Guid rootKey in rootKeys)
            {
                if (navigationQueryService.TryGetDescendantsKeysOfType(rootKey, contentTypeAlias, out IEnumerable<Guid> descendantsKeys))
                {
                    result.AddRange(descendantsKeys);
                }
            }
        }

        contentKeys = result;
        return true;
    }
}