build_fixture_sql

# File activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb, line 434
        def build_fixture_sql(fixtures, table_name)
          columns = schema_cache.columns_hash(table_name)

          values = fixtures.map do |fixture|
            fixture = fixture.stringify_keys

            unknown_columns = fixture.keys - columns.keys
            if unknown_columns.any?
              raise Fixture::FixtureError, %(table "#{table_name}" has no columns named #{unknown_columns.map(&:inspect).join(', ')}.)
            end

            columns.map do |name, column|
              if fixture.key?(name)
                type = lookup_cast_type_from_column(column)
                bind = Relation::QueryAttribute.new(name, fixture[name], type)
                with_yaml_fallback(bind.value_for_database)
              else
                default_insert_value(column)
              end
            end
          end

          table = Arel::Table.new(table_name)
          manager = Arel::InsertManager.new
          manager.into(table)
          columns.each_key { |column| manager.columns << table[column] }
          manager.values = manager.create_values_list(values)

          manager.to_sql
        end