Schema plus
- 1. SchemaPlus enhanced capabilities for schema definition and querying Ronen Barzel & Michał Łomnicki
- 2. History Simon Harris / harukizaemon redhillonrails_core (2006, 2009) foreign_key_migrations => automatic_foreign_key schema_plus (2011)
- 4. Plain ActiveRecord create_table :comments do |t| t.text :body t.integer :post_id t.integer :author_id end execute "ALTER TABLE comments ADD FOREIGN KEY (post_id) REFERENCES (posts)" execute "ALTER TABLE comments ADD FOREIGN KEY (author_id) REFERENCES (users)" add_index :comments, :post_id
- 5. With schema_plus create_table :comments do |t| t.text :body t.integer :post_id, :index => true t.integer :author_id, :references => :users end
- 6. auto-index foreign keys # without auto_index t.integer :post_id, :index => true # with auto_index t.integer :post_id
- 7. index t.string :area_code t.string :local_number, :index => { :unique => true, :with => :area_code }
- 8. Other features global, per table and per statement config expressional indexes views
- 9. SchemaAssociations # without schema_associations class Post < ActiveRecord::Base belongs_to :author has_many :comments end
- 10. SchemaAssociations # without schema_associations class Post < ActiveRecord::Base # associations auto-created from foreign keys end
- 11. SchemaValidations create_table :posts do |t| t.integer :author_id, :null => false, :references => :users t.integer :likes_count t.string :content, :limit => 5_000 end
- 12. SchemaValidations # without schema_validations class Post < ActiveRecord::Base validates :author, :presence => true validates :likes_count, :numericality => true validates :content, :length => { :maximum => 5_000 } end
- 13. SchemaValidations # with schema_validations class Post < ActiveRecord::Base end
- 14. Schema Family Scary? ...but that's next step for active record pattern