Ruby on rails relationships - ruby-on-rails

Question

I am extremely new to ruby and programming in general. In the copy, paste, and pray stage as I like to call it. I am trying to restrict access of editing posts and comments to the creator but when i create a post the user_id isn't populating in the database.
thanks in advance for the help.
routes
map.resources :user_sessions
map.resources :users
map.resources :questions, :has_one => :user, :has_many => :answers
map.login "login", :controller => "user_sessions", :action => "new"
map.logout "logout", :controller => "user_sessions", :action => "destroy"
the user model
class User < ActiveRecord::Base
acts_as_authentic
has_many :questions
has_many :answers
end
the question model
class Question < ActiveRecord::Base
validates_presence_of :question, :tag
validates_length_of :question, :minimum => 5
validates_length_of :tag, :minimum =>4
belongs_to :user
has_many :answers
end
the answer model
class Answer < ActiveRecord::Base
belongs_to :question
belongs_to :user
end
enter code here
the question controller
class QuestionsController < ApplicationController
before_filter :find_question,
:only => [:show, :edit, :update, :destroy]
# GET /questions
# GET /questions.xml
def index
#questions = Question.all
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => #questions }
end
end
# GET /questions/1
# GET /questions/1.xml
def show
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => #question }
end
end
# GET /questions/new
# GET /questions/new.xml
def new
##question = Question.new
#user = Question.new
end
# GET /questions/1/edit
def edit
end
# POST /questions
# POST /questions.xml
def create
#question = Question.new(params[:question])
##question = Question.user.new(params[:question])
if #question.save
flash[:notice] = 'Question was successfully created.'
redirect_to(#question)
else
render :action => "new"
end
end
end
# PUT /questions/1
# PUT /questions/1.xml
def update
if #question.update_attributes(params[:question])
flash[:notice] = 'Question was successfully updated.'
redirect_to(#question)
else
render :action => "edit"
end
end
# DELETE /questions/1
# DELETE /questions/1.xml
def destroy
#question.destroy
redirect_to(questions_url)
end
private
def find_question
#question = Question.find(params[:id])
end
answer controller
class AnswersController < ApplicationController
def index
#question = Question.find(params[:question_id])
#answer = #question.answers
end
def show
#question = Question.find(params[:question_id])
#answer = #question.answers.find(params[:id])
end
def new
#question = Question.find(params[:question_id])
##question = Question
#answer = #question.answers.build
##answer = Answer.new
#redirect_to questions_url(#answer.question_id)
end
def create
##question = Question.find(params[:question_id])
# #question = Question
#answer = Answer.new(params[:answer])
if #answer.save
redirect_to question_url(#answer.question_id)
else
render :action => "new"
end
end
def edit
#question = Question.find(params[:question_id])
#answer = #question.answers.find(params[:id])
end
def update
#question = Question.find(params[:question_id])
#answer = Answer.find(params[:id])
if #answer.update_attributes(params[:answer])
redirect_to question_answer_url(#question, #answer)
else
render :action => "edit"
end
end
def destroy
#question = Question.find(params[:question_id])
#answer = Answer.find(params[:id])
#answer.destroy
respond_to do |format|
format.html {redirect_to #question}
format.xml {head :ok}
end
end
end

Answer 1

You need to scope your model to the related object for ActiveRecord to populate foreign keys. This is easiest using a helper method. If you wanted to scope to the user:
Excerpted from one of my apps using Authlogic:
class ApplicationController < ActionController::Base
helper_method :current_user_session, :current_user
protected
def current_user_session
#current_user_session ||= UserSession.find
end
def current_user
#current_user ||= current_user_session && current_user_session.user
end
end
Then you can scope e.g. current_user.answers.build, or current_user.answers.find(params[:id]
As answers belong to users and questions. You're going to have to set the scope to whichever object makes the most sense. Assuming you decided it's the user object, you'll have to set the question_id yourself Add #answer.question = #question to your controller action. Don't get into setting foreign keys manually e.g. #answer.question_id = #question.id when ActiveRecord will happily do it for you.

Answer 2

Do you have a current_user that is authenticated? If not, you need one. I haven't used AuthLogic but there should be some good tutorials on how to do that.
Assuming you do have a current_user, the easiest solution would be to do something like:
def create
#answer = Answer.new(params[:answer])
#answer.user_id = current_user.id <--- add this line
if #answer.save
redirect_to question_url(#answer.question_id)
else
render :action => "new"
end
end