turbovault-app/db/migrate/20260328183451_create_collections.rb

class CreateCollections < ActiveRecord::Migration[8.1]
  def change
    create_table :collections do |t|
      t.references :user, null: false, foreign_key: true, index: true
      t.string :name, null: false
      t.text :description
      t.integer :parent_collection_id

      t.timestamps
    end

    add_index :collections, :parent_collection_id
    add_foreign_key :collections, :collections, column: :parent_collection_id

    # Enable Row Level Security
    execute <<-SQL
      ALTER TABLE collections ENABLE ROW LEVEL SECURITY;

      CREATE POLICY collections_isolation_policy ON collections
        USING (user_id = current_setting('app.current_user_id', true)::bigint);
    SQL
  end
end