require "cases/helper" require 'support/connection_helper' module PostgresqlCompositeBehavior include ConnectionHelper class PostgresqlComposite < ActiveRecord::Base self.table_name = "postgresql_composites" end def setup super @connection = ActiveRecord::Base.connection @connection.transaction do @connection.execute <<-SQL CREATE TYPE full_address AS ( city VARCHAR(90), street VARCHAR(90) ); SQL @connection.create_table('postgresql_composites') do |t| t.column :address, :full_address end end end def teardown super @connection.drop_table 'postgresql_composites', if_exists: true @connection.execute 'DROP TYPE IF EXISTS full_address' reset_connection PostgresqlComposite.reset_column_information end end # Composites are mapped to `OID::Identity` by default. The user is informed by a warning like: # "unknown OID 5653508: failed to recognize type of 'address'. It will be treated as String." # To take full advantage of composite types, we suggest you register your own +OID::Type+. # See PostgresqlCompositeWithCustomOIDTest class PostgresqlCompositeTest < ActiveRecord::TestCase include PostgresqlCompositeBehavior def test_column ensure_warning_is_issued column = PostgresqlComposite.columns_hash["address"] assert_nil column.type assert_equal "full_address", column.sql_type assert_not column.array? type = PostgresqlComposite.type_for_attribute("address") assert_not type.binary? end def test_composite_mapping ensure_warning_is_issued @connection.execute "INSERT INTO postgresql_composites VALUES (1, ROW('Paris', 'Champs-Élysées'));" composite = PostgresqlComposite.first assert_equal "(Paris,Champs-Élysées)", composite.address composite.address = "(Paris,Rue Basse)" composite.save! assert_equal '(Paris,"Rue Basse")', composite.reload.address end private def ensure_warning_is_issued warning = capture(:stderr) do PostgresqlComposite.columns_hash end assert_match(/unknown OID \d+: failed to recognize type of 'address'\. It will be treated as String\./, warning) end end class PostgresqlCompositeWithCustomOIDTest < ActiveRecord::TestCase include PostgresqlCompositeBehavior class FullAddressType < ActiveRecord::Type::Value def type; :full_address end def deserialize(value) if value =~ /\("?([^",]*)"?,"?([^",]*)"?\)/ FullAddress.new($1, $2) end end def cast(value) value end def serialize(value) return if value.nil? "(#{value.city},#{value.street})" end end FullAddress = Struct.new(:city, :street) def setup super @connection.type_map.register_type "full_address", FullAddressType.new end def test_column column = PostgresqlComposite.columns_hash["address"] assert_equal :full_address, column.type assert_equal "full_address", column.sql_type assert_not column.array? type = PostgresqlComposite.type_for_attribute("address") assert_not type.binary? end def test_composite_mapping @connection.execute "INSERT INTO postgresql_composites VALUES (1, ROW('Paris', 'Champs-Élysées'));" composite = PostgresqlComposite.first assert_equal "Paris", composite.address.city assert_equal "Champs-Élysées", composite.address.street composite.address = FullAddress.new("Paris", "Rue Basse") composite.save! assert_equal 'Paris', composite.reload.address.city assert_equal 'Rue Basse', composite.reload.address.street end end