working with entity framework query - entity-framework

Question

I am working on entity to get the posts on user wall of posted by him and posted to him and posted by his friends
For this I have 4 tables
userprofile
post
postcomment
friends
Userprofile table has UserID, UserName, ProfileImg
Post table has PostId, postedby, postedto, message,posteddate
postcomment table has commentid, postid, commentedby, message, commenteddate
friends table has id, Username, friendUserName
and in entity
userprofile to post--- 1 to many
post to postcomment --- 1 to many
userprofile to postcomment--- 1 to many
post to friends --- many to many
I have used the query shown below to get posts posted by him and posted to him... but I am confused on how to include the posts posted by his friends.... please help me in this
var ret = (from post in db.Posts.ToList()
where post.PostedBy == (int)Session["UserID"] ||
post.PostedBy == db.friends.all(something to get friends one by one)||
post.PostedTo == Session["UserName"].ToString()
orderby post.PostedDate descending
select new
{
Message = post.Message,
PostedBy = post.PostedBy,
PostedByName = post.UserProfile.UserName,
ProfileImage = imgFolder + (String.IsNullOrEmpty(post.UserProfile.ProfileImg) ? defaultAvatar : post.UserProfile.ProfileImg),
PostedDate = post.PostedDate,
PostedTo = post.PostedTo,
PostId = post.PostId,
PostComments = from comment in post.PostComments.ToList()
orderby comment.CommentedDate
select new
{
CommentedBy = comment.CommentedBy,
CommentedByName = comment.UserProfile.UserName,
ProfileImage = imgFolder + (String.IsNullOrEmpty(comment.UserProfile.ProfileImg) ? defaultAvatar : comment.UserProfile.ProfileImg),
CommentedDate = comment.CommentedDate,
CommentId = comment.CommentId,
Message = comment.Message,
PostId = comment.PostId
}
}).AsEnumerable();
im returning ret to jquery to dynamically update the posts.... is there any solution or i have to completely change the query ??? I want to get the posts posted to the user and posted by the user and posted by his friends to display on user wall ... what is the best way to do it??
UPDATE
As of now i got this solution... there may be better solution for this.. if any please let me know..
var ret = (from post in db.Posts.ToList()
where post.PostedBy == (int)Session["UserID"] ||
(from frnd in db.friends where frnd.userId == (int)Session["UserID"] select frnd.frndId).Contains(post.PostedBy)||
post.PostedTo == Session["UserName"].ToString()
orderby post.PostedDate descending
select new
{
Message = post.Message,
PostedBy = post.PostedBy,
PostedByName = post.UserProfile.UserName,
ProfileImage = imgFolder + (String.IsNullOrEmpty(post.UserProfile.ProfileImg) ? defaultAvatar : post.UserProfile.ProfileImg),
PostedDate = post.PostedDate,
PostedTo = post.PostedTo,
PostId = post.PostId,
PostComments = from comment in post.PostComments.ToList()
orderby comment.CommentedDate
select new
{
CommentedBy = comment.CommentedBy,
CommentedByName = comment.UserProfile.UserName,
ProfileImage = imgFolder + (String.IsNullOrEmpty(comment.UserProfile.ProfileImg) ? defaultAvatar : comment.UserProfile.ProfileImg),
CommentedDate = comment.CommentedDate,
CommentId = comment.CommentId,
Message = comment.Message,
PostId = comment.PostId
}
}).AsEnumerable();