method

column_for_attribute

Ruby on Rails latest stable (v7.1.3.2) - 0 notes - Class: ActiveRecord::AttributeMethods::ClassMethods

1.0.0
1.1.6
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2.0.3
2.1.0
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5.0.0.1 (10)
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5.2.3 (0)
6.0.0 (0)
6.1.3.1
6.1.7.7
7.0.0
7.1.3.2
7.1.3.4
What's this?

Method deprecated or moved

This method is deprecated or moved on the latest stable version. The last existing version (v6.0.0) is shown here.

These similar methods exist in v7.1.3.2:

column_for_attribute(name) public

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>, ...>

Show source

# File activerecord/lib/active_record/attribute_methods.rb, line 187
      def column_for_attribute(name)
        name = name.to_s
        columns_hash.fetch(name) do
          ConnectionAdapters::NullColumn.new(name)
        end
      end

column_for_attribute

Related methods

Method deprecated or moved