Rails：ActionController :: ParameterMissing

Question

我正在构建一个应用程序，允许：用户放置：订单：地点。我在PlacesController中定义 orders_params ，但Rails说ParameterMissing（“ params缺失或值为空：order ”）

如何修复此问题，以便可以通过 app / place / PLACE_ID / book 创建：place_id的订单？

PlacesController：

def book
    @place = Place.find(params[:id])
    @order = Order.new(order_params)
    if @order.save
        flash[:success] = "Success"
        redirect_to @place
    else
        render 'book'
    end
end

private

def place_params
  params.require(:place).permit(:place_name)
end

def order_params
  params.require(:order).permit(:place_id, :user_id)
end

的routes.rb

get 'book' => 'places#show#book'
get '/places/:id/book' => 'places#book', as: :place_book
resources :places

OrdersController

class OrdersController < ApplicationController

def new
end

def create 
    @place = Place.find(@order.place_id)
    @order = Order.new(user_id: current_user.id, place_id: @place)
    if @order.save
        flash[:success] = "Order placed"
        redirect_to @place
    else
        render 'book'
    end
end

def show
end

def edit 
end

def update
end

def destroy
end

private

def order_params
    params.require(:order).permit(:place_id, :user_id)
end

端

型号：Order.rb

belongs_to :user
has_one :place
validates :user_id, presence: true
validates :place_id, presence: true
## OTHER VALIDATIONS

查看：app / views / places / book

<%= form_for(@order) do |f| %>
    <!-- SOME FORM_FORS -->
    <%= f.submit "Place order", class: "btn btn-primary" %>
<% end %>