Categories

Users can create categories to organize their resources (decks, etc.) with custom tags.

Models

Category (app/models/category.rb)

• name – category name (required)
• user_id – optional owner; uniqueness scoped to user
• Has many categorizations (dependent: destroy)

Categorization (app/models/categorization.rb)

• Polymorphic join table linking categories to any categorizable model
• category_id, categorizable_type, categorizable_id
• Uniqueness constraint on (category_id, categorizable_type, categorizable_id)

Taggable Concern

Models include the Taggable concern to gain category support:

• Included in: Deck
• tag_list – returns category names as an array
• tag_list= – accepts array or JSON string
• categories_for_user – returns categories scoped to the current user
• tagged_with(tag_name) – scope for finding tagged records
• On save, set_categories_from_input parses JSON from tag_list_input and finds or creates categories