Contents

# frozen_string_literal: false

# @!method ActiveRecord::Migration#rename_enum(name, to:)
# Change the name and/or schema of an enumerated type
#
# @param [#to_s] :name (nil) The qualified name of the type
# @option [#to_s] :to (nil) The new qualified name for the type
#
# @example:
#
#   rename_enum "currencies", to: "finances.currency"
#
# The operation is always reversible.

module PGTrunk::Operations::Enums
  # @private
  class RenameEnum < Base
    validates :new_name, presence: true
    validates :force, :if_exists, :values, :changes, absence: true

    def to_sql(_version)
      [*change_schema, *change_name].join("; ")
    end

    def invert
      self.class.new(**to_h, name: new_name, to: name)
    end

    private

    def change_schema
      return if name.schema == new_name.schema

      "ALTER TYPE #{name.to_sql} SET SCHEMA #{new_name.schema.inspect};"
    end

    def change_name
      return if new_name.name == name.name

      moved = name.merge(schema: new_name.schema)
      "ALTER TYPE #{moved.to_sql} RENAME TO #{new_name.name.inspect};"
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
pg_trunk-0.1.0	lib/pg_trunk/operations/enums/rename_enum.rb