controller.rb

  # POST /calls
  # POST /calls.json
  def create
    @call = Call.new(params[:call])
    @call.user_id = current_user.id

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

  # PUT /calls/1
  # PUT /calls/1.json
  def update
    @call = Call.find(params[:id])
    @call.user_id = current_user.id

    respond_to do |format|
      if @call.update_attributes(params[:call])
        format.html { redirect_to @call, notice: 'Call was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @call.errors, status: :unprocessable_entity }
      end
    end
  end