method

column_for_attribute

v4.2.7 - Show latest stable - 0 notes - Class: ActiveRecord::AttributeMethods::ClassMethods

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What's this?

column_for_attribute(name) public

Returns the column object for the named attribute. Returns nil 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)
# => nil

Show source

# File activerecord/lib/active_record/attribute_methods.rb, line 206
      def column_for_attribute(name)
        column = columns_hash[name.to_s]
        if column.nil?
          ActiveSupport::Deprecation.warn(            `#column_for_attribute` will return a null object for non-existent            columns in Rails 5. Use `#has_attribute?` if you need to check for            an attribute's existence..squish)
        end
        column
      end

column_for_attribute

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