Check if two field entries in one record exists
What I am looking for is very simple - a server behaviour similar to the "Check if username exists" server behaviour. However, I would like to check for the existance of two field entries in a particular record and not only one - for example I would like to check for the existance of the person's username as well as the title of a particular article he would like to save to his list of favourites. Should this particular article allready have been saved to his list of favourites, I would like to redirect him to a page that will inform him that the article allready exists in his list of saved articles.
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