Have you noticed through your Google account that there are items being indexed that shouldn't have been?   One for me was taxonomy terms.  Not important to be followed. Being indexed on my sitemap (do I just erase those entries on the XML file?) Being crawled (I am guessing this is with a robots.txt file though I have never created one before) Being viewed (stumbled upon) -> if this even possible to block?   Resolve these quickly by simply adding disallow in robots.txt...

I had the issue where I needed to filter an array list by a specific column.  In my instance, the column is language.  To be able to reduce the query to the language column the code required is levels = selectedCategory?.levels.filter("language = %@", language)Language can be any string, in this instance for me language is a two alpha character such as 'fr', 'en' or 'de'. Further to this you can continue to chain this query through including sort as per levels =...