= Models

The models in Decidim are just plain `ActiveRecord` models, so you can use all the methods that come with it.

A model class example would be:

```ruby
# frozen_string_literal: true

# app/models/decidim/my_module/my_resource.rb
module Decidim
  module MyModule
    class MyResource < Decidim::MyModule::ApplicationRecord
      include Decidim::HasComponent
      include Decidim::Traceable
      include Decidim::Loggable
      include Decidim::Authorable
      include Decidim::TranslatableResource
    end
  end
end
```

== Scopes

Within core provided classes there are no `default_scopes`.

== Validations

All the validations are defined in the models themselves.

== Callbacks

The number of the callbacks is reduced to the minimum.

== Concerns

The concerns are used to share code between models. They are located in `app/models/concerns`.

Most commonly used concerns are:

- xref:`Decidim::ActsAsAuthor`
- `Decidim::ActsAsTree`
- `Decidim::Amendable`
- `xref:develop:authorable.adoc[Decidim::Authorable]`
- `xref:develop:authorable.adoc[Decidim::Coauthorable]`
- `Decidim::DownloadYourData`
- `xref:develop:endorsable.adoc[Decidim::Endorsable]`
- `Decidim::FilterableResource`
- `Decidim::Fingerprintable`
- `xref:develop:followable.adoc[Decidim::Followable]`
- `Decidim::FriendlyDates`
- `Decidim::HasArea`
- `Decidim::HasAttachmentCollections`
- `Decidim::HasAttachments`
- `Decidim::HasCategory`
- `Decidim::HasComponent`
- `Decidim::HasPrivateUsers`
- `Decidim::HasReference`
- `Decidim::HasResourcePermission`
- `Decidim::HasUploadValidations`
- `Decidim::Loggable`
- `Decidim::NewsletterParticipant`
- `Decidim::Paddable`
- `Decidim::Participable`
- `Decidim::ParticipatorySpaceResourceable`
- `Decidim::ParticipatorySpaceUser`
- `Decidim::Publicable`
- `Decidim::Randomable`
- `Decidim::RecordEncryptor`
- `xref:develop:reportable.adoc[Decidim::Reportable]`
- `Decidim::Resourceable`
- `Decidim::ScopableParticipatorySpace`
- `Decidim::ScopableResource`
- `Decidim::Searchable`
- `xref:develop:share_tokens.adoc[Decidim::ShareableWithToken]`
- `xref:develop:traceable.adoc[Decidim::Traceable]`
- `xref:develop:machine_translations.adoc[Decidim::TranslatableAttributes]`
- `xref:develop:machine_translations.adoc[Decidim::TranslatableResource]`

=== Module specific concerns

- `Decidim::Comments::Commentable`
- `Decidim::Comments::CommentableWithComponent`
- `Decidim::Comments::HasAvailabilityAttributes`
- `Decidim::Forms::HasQuestionnaire`
- `Decidim::Initiatives::HasArea`
- `Decidim::Initiatives::InitiativeSlug`
- `Decidim::Proposals::CommentableCollaborativeDraft`
- `Decidim::Proposals::CommentableProposal`
- `Decidim::Proposals::ParticipatoryTextSection`
- `Decidim::Proposals::Valuatable`
- `Decidim::Templates::Templatable`

== More information

- https://edgeguides.rubyonrails.org/active_record_basics.html[Active Record documentation]