users_controller.rb

class UsersController < ApplicationController

  def index
    @users = User.all
  end

  def show
    @user = User.find(params[:id])
  end

  def new
    @user = User.new
  end

  def edit
    @user = User.find(params[:id])
  end

  def create
    @user = User.new(user_params)
    if @user.save
      flash[:success] = "User created"
      redirect_to @user
    else
      render 'new', status: :unprocessable_entity
    end
  end

  def update
    @user = User.find(params[:id])
    if @user.update(user_params)
      flash[:success] = "User updated"
      redirect_to @user
    else
      render 'edit', status: :unprocessable_entity
    end
  end

  def destroy
    User.find(params[:id]).destroy
    flash[:success] = "User deleted"
    redirect_to users_url, status: :see_other
  end

  private

    def user_params
      params.require(:user).permit(:name, :email)
    end
end