ruby-on-rails - Link_to create with parameter before - ForbiddenAttributesError 现在

Question

我想要什么:

我在 View 中需要一个按钮或链接(这无关紧要)到 Reservation 的create 操作 Controller 并给它一个参数。

并解决现在给我的 ForbiddenAttributesError。

这是我的模型和 Controller :

预订模型

class Reservation < ActiveRecord::Base
    belongs_to :user
    belongs_to :dinner
end

预订 Controller

class ReservationsController < ApplicationController
  load_and_authorize_resource

  def show
    @reservations = Reservation.joins(:user).where('dinner_id' => params[:dinner_id]).select("users.*,reservations.*")
    @dinnerid = params[:dinner_id]

    respond_to do |format|
      format.html
      format.json { render :json => @reservations }
    end
  end

def create
@reservation = Reservation.new(params[:reservation])
@reservation.user_id = current_user.id

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

  # Never trust parameters from the scary internet, only allow the white list through.
  def reservation_params
    params.require(:reservation).permit(:dinner_id)
  end

end

编辑:根据@Rahul Singh 的建议，这是我的实际代码，但有相对错误:

    <p id="notice"><%= notice %></p>

<table>
  <thead>
  <tr>
    <th>Id</th>
    <th>User id</th>
    <th>Dinner id</th>
    <th>User email</th>
    <th>User name</th>
  </tr>
  </thead>

  <tbody>
  <% @reservations.each do |reservation| %>
      <tr>
        <td><%= reservation.id %></td>
        <td><%= reservation.user_id %></td>
        <td><%= reservation.dinner_id %></td>
        <td><%= reservation.user.email %></td>
        <td><%= reservation.user.name %></td>
      </tr>
  <% end %>
  </tbody>
</table>

<br/>TRY 00a <br/>
<%= form_for(Reservation.new) do |f| %>
    <%= f.hidden_field( :dinner_id, :value => @dinnerid.to_s) %>
    <%= f.submit "Join1" %>
<% end %>
<br/> !!!!!!!!!!ERROR : ActiveModel::ForbiddenAttributesError

<br/>TRY 00b <br/>
<%= link_to "Join1", reservations_path(dinner_id:@dinnerid.to_s), method: :post %>
<br/> !!!!!!!!!!ERROR : param is missing or the value is empty: reservation

我提供错误的截图:

表格错误:https://www.dropbox.com/s/i2x1m520ptqdj56/createReservationForm.jpg

link_to 错误:https://www.dropbox.com/s/8xjwee5oo7q6uhk/createReservationLink_to.jpg

Answer 1

这应该可行

<%= form_for(Reservation.new) do |f| %>
    <%= f.hidden_field( :dinner_id, :value => @dinnerid.to_s) %>
    <%= f.submit "Join1" %>
<% end %>

单击 Join1 按钮会将表单提交给 ReservationsController 创建操作。

并通过链接试试这个

<%= link_to "Join1", reservations_path(dinner_id:@dinnerid.to_s), method: :post %>

要使上述工作正常，请在您的 routes.rb 中添加以下内容

resources :reservations