private static void CascadingInsert()
{
BlogDBContext db = new BlogDBContext();
Post post = new Post()
{
Title = "New Post Title",
Date = DateTime.Now,
Body = "This post has comments and tags",
User = db.Users.First(),
Comments = new Comment[]
{
new Comment()
{
Text = "Comment 1",
Date = DateTime.Now
},
new Comment()
{
Text = "Comment 2",
Date = DateTime.Now,
User = db.Users.First()
}
},
Tags = db.Tags.Take(3).ToList()
};
db.Posts.Add(post);
db.SaveChanges();
}
private static void UpdateExistingData()
{
BlogDBContext db = new BlogDBContext();
User user = db.Users
.Where(u => u.Username == "maria")
.First();
user.PasswordHash = Guid.NewGuid().ToByteArray();
db.SaveChanges();
Console.WriteLine("User #{0} ({1}) has a new random password.",
user.ID, user.Username);
}
private static void DeleteExistingData()
{
BlogDBContext db = new BlogDBContext();
Post lastPost = db.Posts
.OrderByDescending(p => p.ID)
.First();
db.Comments.RemoveRange(lastPost.Comments);
lastPost.Tags.Clear();
db.Posts.Remove(lastPost);
db.SaveChanges();
Console.WriteLine($"Deleted post #{lastPost.ID}");
}
private static void CreateNewData()
{
BlogDBContext db = new BlogDBContext();
Post post = new Post()
{
Title = "New Title",
Body = "New Post Body",
Date = DateTime.Now
};
db.Posts.Add(post);
db.SaveChanges();
Console.WriteLine("Post #{0} created.", post.ID);
}