app/controllers/agents_controller.rb


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class AgentsController < ApplicationController
  def index
    @agents = Agent.all.order(created_at: :desc)
  end

  def show
    @agent = Agent.find(params[:id])
  end

  def new
    @agent = Agent.new
  end

  def edit
    @agent = Agent.find(params[:id])
  end

  def create
    @agent = Agent.new(agent_params)

    if @agent.save
      redirect_to @agent, notice: 'Agent was successfully created.'
    else
      render :new
    end
  end

  def update
    @agent = Agent.find(params[:id])
    if @agent.update(agent_params)
      redirect_to @agent, notice: 'Agent was successfully updated.'
    else
      render :edit
    end
  end

  def destroy
    @agent = Agent.find(params[:id])
    @agent.destroy
    redirect_to agents_url, notice: 'Agent was successfully destroyed.'
  end

  private

  def agent_params
    params.require(:agent).permit(:hostname)
  end
end