public List <Post> GetAllPosts()
{
using (ModelSelfReference ctx = new ModelSelfReference())
{
return(ctx.Posts.Include("Comments").ToList <Post>());
}
}
public int DeletePost(Guid id)
{
using (ModelSelfReference ctx = new ModelSelfReference())
{
return(ctx.Database.ExecuteSqlCommand("Delete From Post where postid = @p0", id));
}
}
public Comment GetCommentById(Guid id)
{
using (ModelSelfReference ctx = new ModelSelfReference())
{
var items = from c in ctx.Comments where (c.CommentId == id) select c;
return(items.Include(p => p.Post).SingleOrDefault());
}
}
public Post GetPostById(Guid id)
{
using (ModelSelfReference ctx = new ModelSelfReference())
{
var items = from p in ctx.Posts where (p.PostId == id) select p;
if (items != null)
{
return(items.Include(c => c.Comments).SingleOrDefault());
}
return(null); // trebuie verificat in apelant
}
}
public bool AddPost(Post post)
{
using (ModelSelfReference ctx = new ModelSelfReference())
{
bool bResult = false;
if (post.PostId == Guid.Empty)
{
var it = ctx.Entry <Post>(post).State = EntityState.Added;
ctx.SaveChanges();
bResult = true;
}
return(bResult);
}
}
public Post UpdatePost(Post newPost)
{
using (ModelSelfReference ctx = new ModelSelfReference())
{
Post oldPost = ctx.Posts.Find(newPost.PostId);
if (oldPost == null) // nu exista in bd
{
return(null);
}
oldPost.Description = newPost.Description;
oldPost.Domain = newPost.Domain;
oldPost.Date = newPost.Date;
ctx.SaveChanges();
return(oldPost);
}
}
public bool AddComment(Comment comment)
{
using (ModelSelfReference ctx = new ModelSelfReference())
{
bool bResult = false;
if (comment == null || comment.PostPostId == Guid.Empty)
{
return(bResult);
}
if (comment.CommentId == Guid.Empty)
{
ctx.Entry <Comment>(comment).State = EntityState.Added;
Post p = ctx.Posts.Find(comment.PostPostId);
ctx.Entry <Post>(p).State = EntityState.Unchanged;
ctx.SaveChanges();
bResult = true;
}
return(bResult);
}
}
public Comment UpdateComment(Comment newComment)
{
using (ModelSelfReference ctx = new ModelSelfReference())
{
Comment oldComment = ctx.Comments.Find(newComment.CommentId);
// Deoarece parametrul este un Comment ar trebui verificata fiecare
// proprietate din newComment daca are valoare atribuita si
// daca valoarea este diferita de cea din bd.
// Acest lucru il fac numai la modificarea asocierii.
if (newComment.Text != null)
{
oldComment.Text = newComment.Text;
}
if ((oldComment.PostPostId != newComment.PostPostId) &&
(newComment.PostPostId != Guid.Empty))
{
oldComment.PostPostId = newComment.PostPostId;
}
ctx.SaveChanges();
return(oldComment);
}
}
