brewery/app/controllers/memberships_controller.rb

class MembershipsController < ApplicationController
  before_action :set_membership, only: %i[show edit update destroy]

  # GET /memberships or /memberships.json
  def index
    @memberships = Membership.all
  end

  # GET /memberships/1 or /memberships/1.json
  def show
  end

  # GET /memberships/new
  def new
    @membership = Membership.new
    @users = User.all
    @beerclubs = Beerclub.all
  end

  # GET /memberships/1/edit
  def edit
  end

  # POST /memberships or /memberships.json
  def create
    @membership = Membership.new(membership_params)

    respond_to do |format|
      if @membership.save
        format.html { redirect_to membership_url(@membership), notice: "Membership was successfully created." }
        format.json { render :show, status: :created, location: @membership }
      else
        # TODO maybe doing something wrong but the variables of new need to be reinitialized here :D
        @users = User.all
        @beerclubs = Beerclub.all
        format.html { render :new, status: :unprocessable_entity }
        format.json { render json: @membership.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /memberships/1 or /memberships/1.json
  def update
    respond_to do |format|
      if @membership.update(membership_params)
        format.html { redirect_to membership_url(@membership), notice: "Membership was successfully updated." }
        format.json { render :show, status: :ok, location: @membership }
      else
        format.html { render :edit, status: :unprocessable_entity }
        format.json { render json: @membership.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /memberships/1 or /memberships/1.json
  def destroy
    @membership.destroy

    respond_to do |format|
      format.html { redirect_to memberships_url, notice: "Membership was successfully destroyed." }
      format.json { head :no_content }
    end
  end

  private

  # Use callbacks to share common setup or constraints between actions.
  def set_membership
    @membership = Membership.find(params[:id])
  end

  # Only allow a list of trusted parameters through.
  def membership_params
    params.require(:membership).permit(:user_id, :beerclub_id)
  end
end