diff options
Diffstat (limited to 'activerecord/lib/active_record/type/value.rb')
-rw-r--r-- | activerecord/lib/active_record/type/value.rb | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/type/value.rb b/activerecord/lib/active_record/type/value.rb new file mode 100644 index 0000000000..9c1e9dc01e --- /dev/null +++ b/activerecord/lib/active_record/type/value.rb @@ -0,0 +1,68 @@ +module ActiveRecord + module Type + class Value # :nodoc: + attr_reader :precision, :scale, :limit + + # Valid options are +precision+, +scale+, and +limit+. + # They are only used when dumping schema. + def initialize(options = {}) + options.assert_valid_keys(:precision, :scale, :limit) + @precision = options[:precision] + @scale = options[:scale] + @limit = options[:limit] + end + + # The simplified that this object represents. Subclasses + # should override this method. + def type; end + + # Takes an input from the database, or from attribute setters, + # and casts it to a type appropriate for this object. This method + # should not be overriden by subclasses. Instead, override `cast_value`. + def type_cast(value) + cast_value(value) unless value.nil? + end + + def type_cast_for_database(value) + type_cast_for_write(value) + end + + def type_cast_for_schema(value) + value.inspect + end + + def text? + false + end + + def number? + false + end + + def binary? + false + end + + def serialized? + false + end + + def klass # :nodoc: + ::Object + end + + def type_cast_for_write(value) # :nodoc: + value + end + alias_method :raw_type_cast_for_write, :type_cast_for_write # :internal: + + private + + # Responsible for casting values from external sources to the appropriate + # type. Called by `type_cast` for all values except `nil`. + def cast_value(value) # :api: public + value + end + end + end +end |