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# frozen_string_literal: true
module ActiveRecord
module ConnectionAdapters
# PostgreSQL-specific extensions to column definitions in a table.
class PostgreSQLColumn < Column #:nodoc:
delegate :array, :oid, :fmod, to: :sql_type_metadata
alias :array? :array
def serial?
return unless default_function
if %r{\Anextval\('"?(?<sequence_name>.+_(?<suffix>seq\d*))"?'::regclass\)\z} =~ default_function
sequence_name_from_parts(table_name, name, suffix) == sequence_name
end
end
private
def sequence_name_from_parts(table_name, column_name, suffix)
"#{table_name}_#{column_name}_#{suffix}"
end
end
end
end
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