Creating a named_scope for “no children” in a has_many association?
Not sure why your code does not work. Does it error or not return what you expect? Can you post the sql it generates?
However you could try: named_scope :has_no_posts, :include => :posts, :conditions => "posts. Id IS NULL.
Challenger_id = user_id AND fights. Challenger_won = TRUE) OR (fights. Challengee_id = user_id AND NOT fights.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.
Related Questions
Reusing named_scope to define another named_scope?
Disordering of a has_many association with belongs_to reference into the has_many?
Rails: How to use a belongs_to association for referencing in addition to a has_many association?
Setting a :has_many :through association on a belongs_to association Ruby on Rails?
Rails: has_many through association, and the form for creating new instances?
Database Design: Creating an association of an association?