class CreatePolytagTables

# File lib/generators/polytag/install/templates/create_polytag_tables.rb, line 42
def self.down
  drop_table :polytag_tags
  drop_table :polytag_tag_groups
  drop_table :polytag_tag_connections
end

# File lib/generators/polytag/install/templates/create_polytag_tables.rb, line 2
def self.up
  # Create the tags table
  create_table :polytag_tags do |t|
    t.string :name, index: true
    t.belongs_to :polytag_tag_group, index: true
    t.timestamps
  end

   # Create the tag groups table
  create_table :polytag_tag_groups do |t|
    t.string :name, index: true
    t.belongs_to :owner, polymorphic: true, index: true
    t.timestamps
  end

  # Create the tag group relations table
  create_table :polytag_connections do |t|
    t.belongs_to :polytag_tag, index: true
    t.belongs_to :polytag_tag_group, index: true
    t.belongs_to :owner, polymorphic: true, index: true
    t.belongs_to :tagged, polymorphic: true, index: true
    t.timestamps
  end

  # Index for the category and name
  add_index :polytag_tags, [:polytag_tag_group_id, :name],
    name: :polytag_tags_unique,
    unique: true

  add_index :polytag_tag_groups,
    [:owner_type, :owner_id, :name],
    name: :polytag_tag_groups_unique,
    unique: true

  add_index :polytag_connections,
    [:polytag_tag_id, :polytag_tag_group_id, :owner_type, :owner_id, :tagged_type, :tagged_id],
    name: :polytag_connections_unique,
    unique: true
end