Question

我看过像这样的问题，但我无法弄清楚如何解决它。我做了几次不成功的尝试。我在PropuneresController #new中得到了这个错误＆＃34; ActionController :: ParameterMissing param丢失或值为空：{：user_id =＆gt; 9}＆＃34;访问http://localhost:3000/users/9/propuneres/new时。

routes.rb

Rails.application.routes.draw do
  get 'users/show'

  devise_for :users

  get 'static/home'

  get 'static/despre'

  resources :users, only: [:show] do
    resources :propuneres
  end

  root to: 'static#home'

propunere.rb

class Propunere < ActiveRecord::Base
  belongs_to :user

end

user.rb

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

   has_many :propuneres


end

propuneres / new.html.erb

<h2> Propunere Nouă </h2>

<%= form_for @propunere, url: user_propuneres_path(@propunere), html: { method: :get } do |f| %>
  <ul>
  <% @propunere.errors.full_messages.each do |error| %>
    <li><%= error %></li>
  <% end %>
  </ul>
  <p>
    <%= f.label :titlu %><br />
    <%= f.text_field :titlu %>
  </p>
  <p>
    <%= f.label :body %><br />
    <%= f.text_area :body %>
  </p>


  <p>
    <%= f.submit %>
  </p>
<% end %>

propuneres_controller.rb

 before_action :prop

def new

    @propunere = Propunere.new()


end

def create
    @propunere = Propunere.new
    @propunere.titlu = params[:propunere][:titlu]
    @propunere.body = params[:propunere][:body]
    @propunere.user_id = params[:propunere][:user_id]
    @propunere.save
    redirect_to propunere_path(@propunere)
end


def index
end


private 



def prop
    params.require(user_id: current_user.id).permit(:titlu, :body,)

end


end

我认为至少有两件事我做错了。感谢您的耐心等待。

Answer 1

在表单中，您必须将用户分配给url（如果您要用作嵌套资源）

user_propuneres_path(@user, @propunere)

在控制器上（您将此问题标记为Rails 3，我假设您没有使用gem＆＃39; strong_parameters＆＃39;），然后您可以删除方法prop并将此代码用于新并创建：

def new
  @user = User.find(params[:user_id])
  @propunere = @user.propuneres.build
end

def create
  @user = User.find(params[:user_id])
  @propunere = @user.propuneres.new(params[:propunere])
  if @propunere.save
    redirect_to user_propunere_path(@user, @propunere)
  else
    render 'new'
  end
end

param丢失或值为空：{：user_id =＆gt; 9}

1 个答案: