discourse/db/migrate/20220322024216_add_bookmark...

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# frozen_string_literal: true
class AddBookmarkPolymorphicColumns < ActiveRecord::Migration[6.1]
def change
if !column_exists?(:bookmarks, :bookmarkable_id)
add_column :bookmarks, :bookmarkable_id, :integer
end
if !column_exists?(:bookmarks, :bookmarkable_type)
add_column :bookmarks, :bookmarkable_type, :string
end
if !index_exists?(:bookmarks, [:user_id, :bookmarkable_type, :bookmarkable_id])
add_index :bookmarks, [:user_id, :bookmarkable_type, :bookmarkable_id], name: "idx_bookmarks_user_polymorphic_unique", unique: true
end
end
end