Undefined Method in Picture Controller - methods

Question

Warning, I'm a newb and trying to learn RoR on my own. Been doing the tutorials etc and now trying to learn through experience. Long story short I'm trying to attach a user picture from a url defined by them, with a default pic if they don't supply one. Been running into all kinds of errors, I think I have it down to one primary issue now after hours of trying to figure it all out (since I'm new at this). So right now the error I'm getting is:
NoMethodError in GravsController#update
undefined method `update_attributes' for nil:NilClass
I know this means I need to do something like:
#something = Model.new/build(params[:method])
But I don't know where to define it in my controller (I'm guessing the gravs_controller right?) So here's my code, tear it apart and see if you can help me get this image function working, please :)
class GravsController < ApplicationController
before_filter :signed_in_user
gravs_controller
def create
#graver = current_user.gravs.new(params[:content])
#grav_bool = false
if #graver.save
#grav_bool = true
#grav_bool.save
flash[:success] = "User Picture Saved!"
redirect_to faq_path
else
#grav_bool = false
#grav_bool.save
redirect_to faq_path
end
end
def update
if #graver.update_attributes(params[:content])
#grav_bool = true
#grav_bool.save
flash[:success] = "User Picture Saved!"
redirect_to faq_path
else
#grav_bool = false
#grav_bool.save
redirect_to faq_path
end
end
end
users_controller
class UsersController < ApplicationController
before_filter :signed_in_user, only: [:index, :edit, :update, :destroy, :gravs]
before_filter :correct_user, only: [:edit, :update, :gravs]
before_filter :admin_user, only: :destroy
def index
#users = User.paginate(page: params[:page])
end
def show
#user = User.find(params[:id])
#microposts = #user.microposts.paginate(page: params[:page])
end
def new
#user = User.new
end
def create
#user = User.new(params[:user])
if #user.save
sign_in #user
flash[:success] = "Welcome to Inception!"
redirect_to gravs_path
else
render 'new'
end
end
def edit
end
def update
if #user.update_attributes(params[:user])
sign_in #user
flash[:success] = "Profile updated"
redirect_to gravsid_path
else
render 'edit'
end
end
def destroy
User.find(params[:id]).destroy
flash[:success] = "User deleted"
redirect_to users_path
end
private
def correct_user
#user = User.find(params[:id])
redirect_to (root_path), error: "Cannot edit others information!" unless current_user?(#user)
end
def admin_user
redirect_to(root_path) unless current_user.admin?
end
end
create.html.erb (Inside /views/gravs/)
<% provide(:title, "Edit Picture") %>
<div class="barney">
<div class="trouble">
<h1>Update Your Picture</h1>
<%= gravs_display #graver %>
<%= form_for(:grav) do |f| %>
<div class="field">
<%= f.text_field :content, placeholder: "Enter Picture URL" %>
</div>
<%= f.submit "Update User Image", class: "btn btn-small btn-primary" %>
<% end %>
</div>
</div>
update.html.erb (inside /views/gravs/)
<% provide(:title, "Edit Picture") %>
<div class="barney">
<div class="trouble">
<div class="row">
<div class="span6 offset3">
<h1>Update Your Picture</h1>
<%= gravs_display #graver %>
<%= form_for(:gravs) do |f| %>
<div class="field">
<%= f.text_field :content, placeholder: "Update Picture URL" %>
</div>
<%= f.submit "Update User Image", class: "btn btn-small btn-primary" %>
<% end %>
</div>
</div>
</div>
</div>
** datenumber_create_gravs.rb**
class CreateGravs < ActiveRecord::Migration
def change
create_table :gravs do |t|
t.string :content
t.integer :user_id
end
end
end
schema.rb
ActiveRecord::Schema.define(:version => 20130407202835) do
create_table "gravs", :force => true do |t|
t.string "content"
t.integer "user_id"
end
create_table "microposts", :force => true do |t|
t.string "content"
t.integer "user_id"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
end
add_index "microposts", ["user_id", "created_at"], :name => "index_microposts_on_user_id_and_created_at"
create_table "users", :force => true do |t|
t.string "name"
t.string "email"
t.datetime "created_at", :null => false
t.datetime "updated_at", :null => false
t.string "password_digest"
t.string "remember_token"
t.boolean "admin", :default => false
end
add_index "users", ["email"], :name => "index_users_on_email", :unique => true
add_index "users", ["remember_token"], :name => "index_users_on_remember_token"
end
routes.rb
MydeaSample::Application.routes.draw do
resources :users
resources :sessions, only: [:new, :create, :destroy]
resources :microposts, only: [:create, :destroy]
root to: "static_pages#home"
match '/help', to: 'static_pages#help'
match '/about', to: 'static_pages#about'
match '/contact', to: 'static_pages#contact'
match '/signup', to: 'users#new'
match '/signin', to: 'sessions#new'
match '/signout', to: 'sessions#destroy', via: :delete
match '/message', to: 'static_pages#message'
match '/faq', to: 'static_pages#faq'
match '/gravs', to: 'gravs#create'
match '/gravsid', to: 'gravs#update'