## Many To Many Relationships

​

using (var connection = new SQLiteConnection(connString))

{

    var sql = @"select p.postid, headline, t.tagid, tagname

                from posts p 

                inner join posttags pt on pt.postid = p.postid

                inner join tags t on t.tagid = pt.tagid";

    var posts = await connection.QueryAsync<Post, Tag, Post>(sql, (post, tag) => {

        post.Tags.Add(tag);

        return post;

    }, splitOn: "tagid");

    var result = posts.GroupBy(p => p.PostId).Select(g =>

    {

        var groupedPost = g.First();

        groupedPost.Tags = g.Select(p => p.Tags.Single()).ToList();

        return groupedPost;

    });

    foreach(var post in result)

    {

        Console.Write($"{post.Headline}: ");

        foreach(var tag in post.Tags)

        {

            Console.Write($" {tag.TagName} ");

        }

        Console.Write(Environment.NewLine);

    }

}