volunteers/app/controllers/members_controller.rb

class MembersController < ApplicationController
  before_action :set_member, only: %i[ show edit update destroy ]

  # GET /members
  def index
    @members = Member.public_scope.
                where("arriving < ? " , Date.today).
                where("leaving > ?" , Date.today).
                order(:leaving).
                page params[:page]
  end

  def timeline
    @members = Member.visible_scope.order(:name).page params[:page]
  end

  # GET /members/1
  def show
  end

  # GET /members/1/edit
  def edit
  end

  # POST /members
  def create
    @member = Member.new(member_params)

    if @member.save
      redirect_to @member, notice: "Member was successfully created."
    else
      render :new, status: :unprocessable_entity
    end
  end

  # PATCH/PUT /members/1
  def update
    if @member.update(member_params)
      redirect_to @member, notice: "Member was successfully updated."
    else
      render :edit, status: :unprocessable_entity
    end
  end

  # DELETE /members/1
  def destroy
    @member.destroy
    redirect_to members_url, notice: "Member was successfully destroyed."
  end

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

    # Only allow a list of trusted parameters through.
    def member_params
      params.require(:member).permit(:name, :public, :bio , :picture,
                                    :picture_cache , :arriving ,:leaving)
    end
end