instance method `read_attribute`

Ruby on Rails 4.1.16

Since v3.0.20

Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

read_attribute(attr_name)

Returns the value of the attribute identified by attr_name after it has been typecast (for example, “2004-12-12” in a date column is cast to a date object, like Date.new(2004, 12, 12)).

Parameters

attr_name req

Source

# File activerecord/lib/active_record/attribute_methods/read.rb, line 107
      def read_attribute(attr_name)
        # If it's cached, just return it
        # We use #[] first as a perf optimization for non-nil values. See https://gist.github.com/jonleighton/3552829.
        name = attr_name.to_s
        @attributes_cache[name] || @attributes_cache.fetch(name) {
          column = @column_types_override[name] if @column_types_override
          column ||= @column_types[name]

          return @attributes.fetch(name) {
            if name == 'id' && self.class.primary_key != name
              read_attribute(self.class.primary_key)
            end
          } unless column

          value = @attributes.fetch(name) {
            return block_given? ? yield(name) : nil
          }

          if self.class.cache_attribute?(name)
            @attributes_cache[name] = column.type_cast(value)
          else
            column.type_cast value
          end
        }
      end

Defined in activerecord/lib/active_record/attribute_methods/read.rb line 107 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::AttributeMethods::Read

Signature

Parameters