many things, comments working.

app/models/blogpost.rb

@@ -3,4 +3,5 @@ class Blogpost < ActiveRecord::Base
   validates_presence_of :title, :text, :user
   belongs_to :user
   has_many :comments
+  accepts_nested_attributes_for :comments
 end

app/models/comment.rb

@@ -1,6 +1,6 @@
 class Comment < ActiveRecord::Base
-  attr_accessible :text, :user_id, :blogpost_id
+  attr_accessible :text, :user_id, :blogpost, :post
   validates_presence_of :text, :user_id, :blogpost_id
   belongs_to :blogpost
   belongs_to :user
-end
+end

app/models/user.rb

@@ -1,7 +1,10 @@
 class User < ActiveRecord::Base
-  attr_accessible :name, :ign, :email, :about, :password, :password_confirmation
+  attr_accessible :name, :ign, :email, :about, :password, :password_confirmation, :rank
   has_secure_password
-  validates_presence_of :password, :on => :create
+  validates_presence_of :password, :name, :email, :ign, :password_confirmation, :on => :create
+  validates :email, :uniqueness => true
+  validates :name, :uniqueness => true
+  validates :ign, :uniqueness => true
 
   has_many :blogposts
   has_many :comments