mastodon/db/migrate/20180831171112_create_bookmarks.rb

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# This migration is a duplicate of 20180410220657 and may get ignored, see
# config/initializers/0_duplicate_migrations.rb
class CreateBookmarks < ActiveRecord::Migration[5.2]
def change
create_table :bookmarks do |t|
t.references :account, null: false
t.references :status, null: false
t.timestamps
end
safety_assured do
add_foreign_key :bookmarks, :accounts, column: :account_id, on_delete: :cascade
add_foreign_key :bookmarks, :statuses, column: :status_id, on_delete: :cascade
end
add_index :bookmarks, [:account_id, :status_id], unique: true
end
end