Ruby on Rails || 向用户添加会议

我正在创建一个应用程序，你可以看到世界上所有的会议。

我得到了什么：

• 创建一个会议
• 显示所有会议

现在我要创建的是一个按钮，让我为用户添加会议。

我想用这个来完成什么：

• 将会议添加到用户
• 在列表中显示添加的会议
• 查看会议和添加内容

我在想一个复制所选对象属性的按钮，并将其添加到选定的用户，以便将来操作和查看会议

我问是否有人可以告诉我如何实现这一目标

https://consulegem-salman15.c9users.io/conferences

移民会议

class CreateConferences < ActiveRecord::Migration[5.0] def change create_table :conferences do |t| t.string :conference t.string :country t.string :month t.string :presence t.string :audience t.integer :cost t.text :content t.references :user, foreign_key: true t.timestamps end add_index :conferences, [:user_id, :created_at] end end 

控制器会议

 class ConferencesController < ApplicationController before_action :logged_in_user, only: [:create, :destroy] before_action :correct_user, only: :destroy before_action :admin_user, only: :destroy def index @conferences = Conference.paginate(page: params[:page]) if params[:search] @conferences = Conference.search(params[:search]).order("created_at DESC").paginate(page: params[:page]) else @conferences = Conference.all.order('created_at DESC').paginate(page: params[:page]) end end def new @user = User.new @conference = Conference.new end def create @conference = current_user.conferences.build(conference_params) if @conference.save flash[:success] = "conference created!" redirect_to conferences_path else @feed_items = current_user.feed.paginate(page: params[:page]) render 'new' end end def destroy @conference.destroy flash[:success] = "conference deleted" redirect_to request.referrer || root_url end private def conference_params params.require(:conference).permit(:conference,:country , :month, :presence, :audience, :cost ,:picture) end # Confirms an admin user. def admin_user redirect_to(root_url) unless current_user.admin? end def correct_user @conference = current_user.conferences.find_by(id: params[:id]) redirect_to root_url if @conference.nil? end end 

模型控制器

 class Conference  { order(created_at: :desc) } mount_uploader :picture, PictureUploader validates :user_id, presence: true validates :conference, presence: true, length: { maximum: 140 } validate :picture_size scope :conference, -> (conference) { where conference: conference } def self.search(search) where("conference LIKE ? OR country LIKE ? OR month LIKE ?", "%#{search}%", "%#{search}%", "%#{search}%") end private # Validates the size of an uploaded picture. def picture_size if picture.size > 5.megabytes errors.add(:picture, "should be less than 5MB") end end end 

Answer 1

我找到的答案是添加一个嵌套在ConferenceController的SubscriptionsController和一个RelationshipController

SubscriptionController

  class SubscriptionsController < ApplicationController before_action :set_conference, only: :create def index @subscriptions = current_user.subscriptions @subscriptions = Subscription.paginate(page: params[:page]) end def show @subscription = Subscription.find_by(id: params[:id]) end def create if current_user.subscriptions.create(conference: @conference) flash[:success] = "You are now subscribed to { @conference.conference }" else flash[:error] = "Could not create subscription." end redirect_to conferences_path end def destroy @subscription = current_user.subscriptions.find(params[:id]) if @subscription.destroy flash[:success] = "You are no longer subscribed to { @conference.conference }" else flash[:error] = "Oh noes" end redirect_to conferences_path end def set_conference @conference = Conference.find_by id: params["conference_id"] end end 

RelationshipController

 class RelationshipsController < ApplicationController before_action :logged_in_user def create @conference = Conference.find(params[:followed_id]) current_user.follow(@conference) respond_to do |format| format.html { redirect_to @conference } format.js end end def destroy @user = Relationship.find(params[:id]).followed current_user.unfollow(@user) respond_to do |format| format.html { redirect_to @user } format.js end end end 

ConferenceController

 class ConferencesController < ApplicationController before_action :logged_in_user, only: [:create, :destroy] before_action :correct_user, only: :destroy before_action :admin_user, only: :destroy def index @conferences = Conference.paginate(page: params[:page]) if params[:search] @conferences = Conference.search(params[:search]).order("created_at DESC").paginate(page: params[:page]) else @conferences = Conference.all.order('created_at DESC').paginate(page: params[:page]) end end def show @conference = Conference.find(params[:id]) end def new @user = User.new @conference = Conference.new end def create @conference = Conference.new(conference_params) @conference.user = current_user if @conference.save flash[:success] = "conference created!" redirect_to conferences_path else @feed_items = current_user.feed.paginate(page: params[:page]) render 'new' end end def destroy @conference.destroy flash[:success] = "conference deleted" redirect_to request.referrer || root_url end private def conference_params params.require(:conference).permit(:conference,:country , :month, :presence, :audience, :cost ,:picture) end # Confirms an admin user. def admin_user redirect_to(root_url) unless current_user.admin? end def correct_user @conference = current_user.conferences.find_by(id: params[:id]) redirect_to root_url if @conference.nil? end end