routes.rb

# Add this line:

map.resources :teams

teams_controller.rb

class TeamController < ApplicationController
  def index
    @teams = Team.find(:all)
  end

  def show
    @team = Team.find(params[:id])
  end

  def new
    @team = Team.new
  end

  def create
    @team = Team.new(params[:team])
    if @team.save
      redirect_to teams_path
    else
      render :action => "new"
    end
  end

  def edit
    @team = Team.find(params[:id])
  end

  def update
    @team = Team.find(params[:id])
    if @team.update_attributes(params[:team])
      redirect_to team_path(@team)
    else
      render :action => "edit"
    end
  end

  def destroy
    Team.find(params[:id]).destroy
    redirect_to teams_path
  end
end