Paperclip not saving photo to Database - ruby-on-rails-4

Question

New to web development and have been trying to solve this for 4 days now - been through every solution here on StackOverflow but none of the answers have worked for me.
I am creating an application that allows users to upload an attachment and photo through Paperclip. Authentication and Authorization through Devise and CanCan
From a edit page, a user can click on a link to open an 'edit' page. From there he can see a form to browse and choose an image to upload. When clicking on the button, it calls the 'update' action and then renders the users show page, the image is saved to a tmp folder but does not insert to the Database.
Here is my User Model
class User < ActiveRecord::Base
has_and_belongs_to_many :roles
has_attached_file :avatar, styles: {
thumb: '50x50>',
square: '200x200#',
medium: '300x300>'
}
def role?(role)
return !!self.roles.find_by_name(role.to_s.camelize)
end
# Validate the attached image is image/jpg, image/png, etc
validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable, :confirmable,
:recoverable, :rememberable, :trackable, :validatable
end
User Controller
class UsersController < ApplicationController
before_action :get_user, :only => [:index, :new, :edit]
before_action :accessible_roles, :only => [:new, :edit, :show, :update, :create]
load_and_authorize_resource :only => [:show, :new, :destroy, :edit, :update]
def index
#users = User.accessible_by(current_ability, :index).limit(20)
respond_to do |format|
format.json { render :json => #users }
format.xml { render :xml => #users }
format.html
end
end
def new
respond_to do |format|
format.json { render :json => #users }
format.xml { render :xml => #users }
format.html
end
end
def show
#user = User.find(params[:id])
respond_to do |format|
format.json { render :json => #users }
format.xml { render :xml => #users }
format.html
end
rescue ActiveRecord::RecordNotFound
respond_to_not_found(:json, :xml, :html)
end
def edit
respond_to do |format|
format.json { render :json => #users }
format.xml { render :xml => #users }
format.html
end
rescue ActiveRecord::RecordNotFound
respond_to_not_found(:json, :xml, :html)
end
def destroy
#user.destroy!
respond_to do |format|
format.json { respond_to_destroy(:ajax) }
format.xml { head :ok }
format.html { respond_to_destroy(:html) }
end
rescue ActiveRecord::RecordNotFound
respond_to_not_found(:json, :xml, :html)
end
def create
#user = User.new(user_params)
if #user.save
respond_to do |format|
format.json { render :json => #users.to_json, :status => 200 }
format.xml { head :ok }
format.html { redirect_to :action => :index }
end
else
respond_to do |format|
format.json { render :text => "Could not create user", :status => :unprocessable_entity }
format.xml { head :ok }
format.html { render :action => :new, :status => :unprocessable_entity }
end
end
end
def update
if params[:user][:password].blank?
[:password, :password_confirmation, :current_password].collect{|p| params[:user].delete(p) }
else
#user.errors[:base] << "The password you entered is incorrect" unless #user.valid_password?(params[:user][:current_password])
end
respond_to do |format|
if #user.errors[:base].empty? and #user.update_attributes(user_params[:user])
flash[:notice] = "Your account has been updated"
format.json { render :json => #user.to_json, :status => 200 }
format.xml { head :ok }
format.html { render :action => :show }
else
format.json { render :text => "Could not update user", :status => :unprocessable_entity }
format.xml { render :xml => #user.errors, :status => :unprocessable_entity }
format.html { render :action => :edit, :status => :unprocessable_entity }
end
end
rescue ActiveRecord::RecordNotFound
respond_to_not_found(:json, :xml, :html)
end
private
def accessible_roles
#accessible_roles = Role.accessible_by(current_ability, :read)
end
def get_user
#user = current_user
end
def user_params
params.require(:user).permit(:name, :email, :password, :password_confirmation, :avatar, :resume)
end
end
Here is the form code:
<%= form_for #user, :html => { :multipart => true } do |f| %>
<div class="field">
<%= f.label :avatar, "Photo" %>
<%= f.file_field :avatar %>
<%= f.submit "Submit" %>
</div>
<% end %>
I can not even seem to get it to display the temp image.
Any help will be much appreciated!
Show.html.erb
<%= image_tag #user.avatar.url(:medium) %>
<%= #user.email %>