forgeplus/app/controllers/sponsorships_controller.rb

class SponsorshipsController < ApplicationController
  before_action :set_sponsorship, only: [:show, :edit, :update, :destroy]

  # GET /sponsorships
  # GET /sponsorships.json
  def index
    @sponsorships = Sponsorship.all
  end

  # GET /sponsorships/1
  # GET /sponsorships/1.json
  def show
  end

  # GET /sponsorships/new
  def new
    @sponsorship = Sponsorship.new
  end

  # GET /sponsorships/1/edit
  def edit
  end

  # POST /sponsorships
  # POST /sponsorships.json
  def create
    @sponsorship = Sponsorship.new(sponsorship_params)

    respond_to do |format|
      if @sponsorship.save
        format.html { redirect_to @sponsorship, notice: 'Sponsorship was successfully created.' }
        format.json { render :show, status: :created, location: @sponsorship }
      else
        format.html { render :new }
        format.json { render json: @sponsorship.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /sponsorships/1
  # PATCH/PUT /sponsorships/1.json
  def update
    respond_to do |format|
      if @sponsorship.update(sponsorship_params)
        format.html { redirect_to @sponsorship, notice: 'Sponsorship was successfully updated.' }
        format.json { render :show, status: :ok, location: @sponsorship }
      else
        format.html { render :edit }
        format.json { render json: @sponsorship.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /sponsorships/1
  # DELETE /sponsorships/1.json
  def destroy
    @sponsorship.destroy
    respond_to do |format|
      format.html { redirect_to sponsorships_url, notice: 'Sponsorship was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_sponsorship
      @sponsorship = Sponsorship.find(params[:id])
    end

    # Only allow a list of trusted parameters through.
    def sponsorship_params
      params.require(:sponsorship).permit(:amount, :visible, :sponsor_id, :developer_id)
    end
end