instance method `column_for_attribute`

Ruby on Rails 5.2.8.1

Since v4.2.9 Last seen in v6.0.6

Available in: v4.2.9 v5.2.8.1 v6.0.6

Compare with:

column_for_attribute(name)

Returns the column object for the named attribute. Returns a ActiveRecord::ConnectionAdapters::NullColumn if the named attribute does not exist.

class Person < ActiveRecord::Base
end

person = Person.new
person.column_for_attribute(:name) # the result depends on the ConnectionAdapter
# => #<ActiveRecord::ConnectionAdapters::Column:0x007ff4ab083980 @name="name", @sql_type="varchar(255)", @null=true, ...>

person.column_for_attribute(:nothing)
# => #<ActiveRecord::ConnectionAdapters::NullColumn:0xXXX @name=nil, @sql_type=nil, @cast_type=#<Type::Value>, ...>

Parameters

name req

Source

# File activerecord/lib/active_record/attribute_methods.rb, line 246
      def column_for_attribute(name)
        name = name.to_s
        columns_hash.fetch(name) do
          ConnectionAdapters::NullColumn.new(name)
        end
      end

Defined in activerecord/lib/active_record/attribute_methods.rb line 246 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::AttributeMethods::ClassMethods

Signature

Parameters