get "/editer", :to => 'users#edit'
post "/editer", :to => 'users#update'

def edit
        @user = User.find(params[:id])
        @perfils= Perfil.order(:name => "ASC").all
end

def update
        @user = User.find(params[:id])
        if @user.update_attributes(user_params)
            redirect_to :action=>"show", :id=>@user.id
            flash[:success] = "ok"
        else
          render 'edit'
        end
end

<div class="form-group">
        <label class="col-sm-2 control-label">Email (*)</label>
        <div class="col-sm-10">
         <%= f.input :email, :label => false,
          :id=>"email", :placeholder => 'Email',
          :class=>"form-control required email",
           :name=>"email", :type=>"text" %></div>
    </div>

<div class="hr-line-dashed"></div>
    <div class="form-group">
    <div class="col-sm-4 col-sm-offset-2">
    <button class="btn btn-primary" type="submit">Guardar</button>
    <button class="btn btn-white" type="submit">Cancelar</button>
</div>
</div>