# Models As in Rails, Kogno uses the [`ActiveRecord`](https://www.rubydoc.info/gems/activerecord) library for this purpose, so the implementation and operation is the same. So you can check out the official [Rails documentation](https://guides.rubyonrails.org/active_record_basics.html) if you want to read more about Models. ## Creating a new Model Model classes should be created in `bot/models/` directory, where, in most cases, each one should have a corresponding database table. Which was [previously configured](/getting-started.md#configure-the-database). In the example below, we will create `Product` model in `bot/models/product.rb` file. For this to work, there must be a table in the database called `products`. ```ruby class Product < ActiveRecord::Base end ``` {% hint style="success" %} ### Associations All the models that are needed can be created (with exception of the predefined by Kogno), defining associations between them. To lear more about associations you can read: [A Guide to Active Record Associations](https://guides.rubyonrails.org/v3.2/association_basics.html)`.` {% endhint %} ## Predefined models In a new project, by default the following models and their corresponding tables are created:

Model	Table	Description
`User`	`users`	Corresponds to users who are having or have had a conversation with the app.
`Sequence`	`kogno_sequences`	Message queue of the Sequences.
`ChatLog`	`kogno_chat_logs`	Stores log of incoming messages/events and replies, if enabled the project's configuration.
`ScheduledMessage`	`kogno_scheduled_messages`	Scheduled Messages queue.
`LongPayload`	`kogno_long_payloads`	It allows the creation of payloads with a number of characters greater than those delimited on each platform.
`MatchedMessage`	`kogno_matched_messages`	Used for updating messages feature from Telegram.
`MessengerRecurringNotification`	`kogno_messenger_recurring_notifications`	Stores the user's subscription current status from Messenger Recurring Notifications.
TelegramChatGroup	`kogno_telegram_chat_group`	Store the Telegram groups or channels where the bot has been included.

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