feat: Portal endpoint (#4633)

app/models/category.rb

@@ -0,0 +1,35 @@
+# == Schema Information
+#
+# Table name: categories
+#
+#  id          :bigint           not null, primary key
+#  description :text
+#  locale      :string           default("en")
+#  name        :string
+#  position    :integer
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#  account_id  :integer          not null
+#  portal_id   :integer          not null
+#
+# Indexes
+#
+#  index_categories_on_locale                 (locale)
+#  index_categories_on_locale_and_account_id  (locale,account_id)
+#
+class Category < ApplicationRecord
+  belongs_to :account
+  belongs_to :portal
+  has_many :folders, dependent: :destroy_async
+  has_many :articles, dependent: :nullify
+
+  before_validation :ensure_account_id
+  validates :account_id, presence: true
+  validates :name, presence: true
+
+  private
+
+  def ensure_account_id
+    self.account_id = portal&.account_id
+  end
+end