Rails Issues with association between User and Contact - ruby-on-rails

Question

Initially started with Contacts, as expected created a list of populated contacts which correctly allow CRUD. Then set up the login with devise which created Users. When logging in as two different users each should only see their own contacts however currently users sees all the same contacts.
Any help resolving this issue would be appreciated?
(Not sure if should have started with User and then created Contact, feels like this is created backwards.)
Understanding for associations is User 'has_many :contacts' and Contacts 'belongs_to :users' have been changing and spiking to no avail.
ContactsController
class ContactsController < ApplicationController
before_action :contact, only: [ :show, :edit, :update, :destroy] before_action :authenticate_user!
def index
#contacts = Contact.all end
def new
#contact = Contact.new end
def create
Contact.create(contact_params)
redirect_to '/contacts' end
def show end
def edit end
def update
#contact.update(contact_params)
redirect_to '/contacts/' + "#{#contact[:id]}" end
def destroy
#contact.destroy
redirect_to '/contacts' end
private
def contact_params
params.require(:contact).permit(:firstname, :surname, :email, :phone, :image) end``
def contact
#contact = Contact.find(params[:id]) end
end
UsersController
class UsersController < ApplicationController
end
model Contact
class Contact < ActiveRecord::Base
belongs_to :users
has_attached_file :image, styles: {thumb: "100x100>"}
validates_attachment_content_type :image, content_type:
/\Aimage\/.*\Z/
end
model user
class User < ActiveRecord::Base has_many :contacts, dependent: :destroy devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable end
indexhtml
<%if user_signed_in? %> <%= link_to 'Log out', destroy_user_session_path, method: :delete %> <%end%>
<% if #contacts.any? %> <% #contacts.each do |contact| %> <%= link_to image_tag(contact.image.url(:thumb)), contact_path(contact) %> <h3><%= contact.firstname%> <%=contact.surname%></h3> <%=contact.email%><br /> <%=contact.phone%> <br /> <br /> <%end%> <%else%> No contacts yet! <%end%> <br /> <br /> <%= link_to 'Add a contact', new_contact_path%>
show html
<p><%= image_tag #contact.image.url(:thumb) %></p> <p><%= #contact.firstname %> <%= #contact.surname %></p> <p><%= #contact.phone %></p> <p><%= #contact.email %></p>
<%= link_to 'Edit', edit_contact_path(#contact) %> <%= link_to 'Remove', contact_path(#contact), method: :delete %><br /><br /> <%= link_to 'Contacts', contacts_path %>
schema
ActiveRecord::Schema.define(version: 20160504125849) do
# These are extensions that must be enabled in order to support this database enable_extension "plpgsql"
create_table "contacts", force: :cascade do |t|
t.string "firstname"
t.string "surname"
t.string "email"
t.integer "phone"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "image_file_name"
t.string "image_content_type"
t.integer "image_file_size"
t.datetime "image_updated_at" end
create_table "users", force: :cascade do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.inet "current_sign_in_ip"
t.inet "last_sign_in_ip"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false end

Answer 1

When logging in as two different users each should only see their own
contacts however currently users sees all the same contacts
The problem is with this line #contacts = Contact.all. It holds all the contacts. As you want to display only the current_user's contacts, you just need it to below
#contacts = current_user.contacts
ActionView::Template::Error: PG::UndefinedColumn: ERROR: column
contacts.user_id does not exist LINE 1: SELECT 1 AS one FROM
"contacts" WHERE "contacts"."user_id" ... ^ : SELECT 1 AS one FROM
"contacts" WHERE "contacts"."user_id" = $1 LIMIT 1
It seems the contacts table doesn't have user_id column. Create a new migration to add the same and do rake db:migrate