controller.rb

class UsersController < ApplicationController
  # GET /users
  # GET /users.xml
  def index
    @users = User.all

    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @users }
    end
  end
  
  def leaderboard

    @search = User.search(params[:search])
    @users = @search.all

    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @users }
    end
  end

  # GET /users/1
  # GET /users/1.xml
  def show
    @user = User.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml  { render :xml => @user }
    end
  end

  # GET /users/new
  # GET /users/new.xml
  def new
    @user = User.new

    respond_to do |format|
      format.html # new.html.erb
      format.xml  { render :xml => @user }
    end
  end

  # GET /users/1/edit
  def edit
    @user = User.find(params[:id])
  end

  # POST /users
  # POST /users.xml
  def create
    @user = User.find(params[:user_id])
        @userpost = @user.userposts.create!(params[:userposts])
        redirect_to @user
      end 
  

  # PUT /users/1
  # PUT /users/1.xml
  def update
    @user = User.find(params[:id])

    respond_to do |format|
      if @user.update_attributes(params[:user])
        format.html { redirect_to(@user, :notice => 'User was successfully updated.') }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @user.errors, :status => :unprocessable_entity }
      end
    end
  end

  # DELETE /users/1
  # DELETE /users/1.xml
  def destroy
    @user = User.find(params[:id])
    @user.destroy

    respond_to do |format|
      format.html { redirect_to(users_url) }
      format.xml  { head :ok }
    end
  end
end

view.erb

<p id="notice"><%= notice %></p>

<p>
  <b>Username:</b>
  <%= @user.username %>
</p>

<p>
  <b>Email:</b>
  <%= @user.email %>
</p>
<!--
<p>
  <b>Crypted password:</b>
  <%= @user.crypted_password %>
</p>

<p>
  <b>Password salt:</b>
  <%= @user.password_salt %>
</p>

<p>
  <b>Persistence token:</b>
  <%= @user.persistence_token %>
</p>
-->
<p>
  <b>Age:</b>
  <%= @user.age %>
</p>

<p>
  <b>Weight:</b>
  <%= @user.weight %>
</p>

<p>
  <b>Max bench:</b>
  <%= @user.maxBench %>
</p>

<p>
  <b>Max Squat:</b>
  <%= @user.maxSquat %>
</p>

<p>
  <b>Gym:</b>
  <%= @user.gym.name %>
</p>

<p>
<%= image_tag @user.photo.url(:small) %>
</p>


<%= link_to 'Edit', edit_user_path(@user) %> |
<%= link_to 'Back', users_path %>

<table>
  <tr>
    <th>Body</th>
    <th></th>
    <th></th>
    <th></th>
  </tr>

<% @user.posts.each do |post| %>
  <tr>
    <td><%= post.body %></td>
    <td><%= link_to 'Show', post %></td>
    <td><%= link_to 'Edit', edit_post_path(post) %></td>
    <td><%= link_to 'Destroy', post, :confirm => 'Are you sure?', :method => :delete %></td>
  </tr>
<% end %>
</table>

<br />

<%= link_to 'New Userpost', new_post_path %>

$ brew install tree
$ tree
> big tree of directory
$ tree | grep 'schema'
> show exactly where that file is