Question

我的rails应用程序中有三个模型。当我创建新通知时，如何重写notification_controller.rb和notifications / new.html.erb中的表单，以便将条目保存到notifications_users表中？感谢

schema.rb

create_table "notifications", force: :cascade do |t|
 t.string "title"
 t.string "first_name"
 t.string "last_name"
 t.datetime "date"
 t.text "content"
 t.datetime "created_at", null: false
 t.datetime "updated_at", null: false

 end

create_table "notifications_users", id: false, force: :cascade do |t|
 t.bigint "user_id", null: false
 t.bigint "notification_id", null: false
 end

create_table "users", force: :cascade do |t|
 t.string "first_name"
 t.string "last_name"
 t.string "user_type"
 t.string "username"
 t.string "password"
 t.datetime "created_at", null: false
 t.datetime "updated_at", null: false
 t.string "password_digest"
 t.index ["username"], name: "index_users_on_username", unique: true

end

new.html.erb

<h1>New Message</h1>

 <div class="row">
 <div class="col-md-6 col-md-offset-3">

 <%= form_for(@notification, url: notifications_new_path) do |f| %>

  <%= f.label :title %>
  <%= f.text_field :title, class: 'form-control' %>


  <%= f.label :first_name %>
  <%= f.text_field :first_name, class: 'form-control' %>

  <%= f.label :date %>
  <%= f.datetime_field :date %>

  <%= f.label :content %>
  <%= f.text_area :content, class: 'form-control' %>

  <%= f.submit "Create my message", class: "btn btn-primary" %>
<% end %>

notifications_controller.rb

def create
  @notification = Notification.new(notification_params)    

  if @notification.save
    flash[:success] = "Notification created!"
    redirect_to @notification 
 else
   render 'new'
 end
end

Answer 1

所以你想在这里创建两个记录，一个Notification记录和一个NotificationUser记录。有很多方法可以做到这一点，例如：

...
@notification = Notification.new(notification_params)    

if @notification.save
  NotificationUser.create(user_id: USER_ID_HERE, notification_id: @notification.id) # OR NotificationUser.create(user: USER_RECORD_HERE, notification: @notification) OR @notification.users << USER_RECORD_HERE
...

如何在Rails中从表单中将数据添加到连接表中？

1 个答案: