无法在控制器中为表单设置参数值

I have a form that lets users add a new blocked tv show to their list of blocked shows. The form is not taking the param values (:user_id, :title, :image) that I tried to set in the controller. I'm a beginner, so I'm guessing the syntax is the problem.

我有一个表单，允许用户将新的被屏蔽的电视节目添加到他们的被屏蔽节目列表中。表单没有采用我试图在控制器中设置的参数值（：user_id，：title，：image）。我是初学者，所以我猜测语法就是问题。

Also I am getting a Couldn't find Tvshow without Id error when trying to use the @tvshow instance variable to set the param values of :title and :image. Each Blocked show should have the same title and image as the tvshow that the user selects in the collection_select. Is there an easier way to do this?

当我尝试使用@tvshow实例变量来设置参数值：title和：image时，我得到一个无法找到Tvshow而没有Id错误。每个Blocked节目应具有与用户在collection_select中选择的tvshow相同的标题和图像。有更简单的方法吗？

View

视图

<%= form_for @blockedshow do |b| %>
<%= b.label :tvshow_id, "Add a Blocked TV Show " %><br/>
<%= collection_select(:blockedshow, :tvshow_id, Tvshow.all, :id, :title, prompt: true) %>

<%= submit_tag 'Add' %>
<% end %>

Controller

调节器

class BlockedshowsController < ApplicationController
  def new
    @blockedshow = Blockedshow.new
  end


  def create
    @tvshow = Tvshow.find params[:blockedshow][:id]
    @blockedshow = Blockedshow.new(safe_blockedshow)
      params[:user_id] = current_user.id
      params[:title] = @tvshow.title
      params[:image] = @tvshow.image

    if @blockedshow.save
      flash[:notice] = "New Blocked TV Show added successfully"
      redirect_to tv_show_index_path
    else
      render 'new'
    end
  end
  private

  def safe_blockedshow
    params.require(:blockedshow).permit(:title, :user_id, :tvshow_id, :image)
  end
    end

Blockedshow model

Blockedshow模型

class Blockedshow < ActiveRecord::Base
  has_many :phrases
  has_many :tvshows
  belongs_to :user
end

Tvshow model

Tvshow模型

class Tvshow < ActiveRecord::Base
    has_many :phrases
    belongs_to :blockedshow


    def self.search_for (query)
            where('title LIKE :query', query: "%#{query}%")
        end
end

Routes

路线

  resources :blockedshows

  post 'blockedshows', to:'blockedshows#create#[:id]'

2 个解决方案

#1

you are getting the issue because params[:blockedshow][:id] is not passed, if your trying to access the Tvshow id selected by from the drop-list you can do the following

你得到的问题是因为没有传递params [：blockedshow] [：id]，如果你试图访问从下拉列表中选择的Tvshow id，你可以执行以下操作

@tvshow = Tvshow.find params[:blockedshow][:tvshow_id]

@tvshow = Tvshow.find params [：blockedshow] [：tvshow_id]

#2

Just fixed by changing the controller to this:

只需将控制器更改为：

 def create
    @tvshow = Tvshow.find params[:blockedshow][:tvshow_id]
    @blockedshow = Blockedshow.new(
        :user_id =>current_user.id,
        :title=> @tvshow.title,
        :image=> @tvshow.image,
        :tvshow_id=>@tvshow.id
    )

#1