Tag: Entity Framework

If you are a .NET developer, there is high chance that you’ve spent way too much time looking at Entity Framework logs to understand and investigate generated queries. Probably one of the most time-consuming tasks is to find out what has been translated to what especially when it comes to complex chatty solutions. Entity Framework Core 2.2 introduced a new feature called Query Tags which can be used to tag queries and make the output traceable. You simply can annotate your LINQ queries using TagWith() method.

Let’s have a look at an example. In the following example, I annotated my query with “List of top 10 books”:

var books =
      (from b in DbContext.Books.TagWith(@"List of top 10 books")
      orderby b.Price descending
      select b).Take(10).ToList();

And here is the query output in the the log:

-- List of top 10 books
 
SELECT TOP(@__p_1) [b].[Id], [b].[Name], [b].[Price]
FROM [Books] AS [b]
ORDER BY [b].[Price] DESC

Now as a developer, I can easily find out my query output in logs without burning calories!