プロフィール画像の変更が反映されない

ガチガチの初心紗です。
プロフィール画像変更できる機能を追加したいのですが

edit.html.erb

<% if @user.errors.any? %>
  <div>
    <ul style="color: red">
      <% @user.errors.full_messages.each do |message| %>
      <h3><%= @user.errors.count %> errors prohibited this obj from being saved</h3>
        <li><%= message %></li>
      <% end %>
    </ul>
  </div>
<% end %>
<div class="container">
<div class="row">
<div class='col-xs-3'>
	<h1>User info</h1>
<table class='table'>
  <%= form_for(@user) do |f| %>
    <label>Name</label>
     <%= f.text_field :name, id: :user_name %></br>

  <label>image</label></br>
  <%= f.attachment_field :profile_image, placeholder: "プロフィール画像", class: "user-edit-form" %></br>

    <lavel>introduction</lavel>
     <%= f.text_area :introduction, id: :user_introduction %></br>
</table>

<div class='row'>
  <%= f.submit "Update User" %></br>
</div>
</div>
</div>
 <% end %>

コントローラー

def edit
		  @user = User.find(params[:id])
      if @user != current_user
        redirect_to user_path(current_user)
      end
	end
def update
		 @user = User.find(params[:id])
      if @user.update(user_params)
        flash[:notice] = "Book was successfully updated."
        redirect_to user_path(@user)
      else
         render "edit"
      end
	end

_profile.html.erb

<h1>User info</h1>
<div class="profile-container">
  <table class="table">
    <thead>
      <tr>
        <div class="profile-container">
          <%= attachment_image_tag user, :profile_image, :fill, 60, 60, fallback: "no_image.jpg", class: "img-circle pull-left profile-thumb" %>
        </div>
      </tr>

      <tr>
        <th>name</th>
        <th><div class="profile-name"><%= user.name %></div></th>
      </tr>

      <tr>
        <th>introduce</th>
        <th><div class="profile-introduction"><%= user.introduction %></div></th>
      </tr>

    <!--   <button type="button" class="btn btn-primary btn-block"> -->
    </thead>
  </table>
</div>

<div class="botan">
  <%= link_to "", edit_user_path(current_user), class: "col-xs-12 btn btn-default glyphicon glyphicon-wrench" %><br>
</div>