method

update_column

v3.2.13 - Show latest stable - Class: ActiveRecord::Persistence

update_column(name, value)

public

Updates a single attribute of an object, without calling save.

Validation is skipped.
Callbacks are skipped.
updated_at/updated_on column is not updated if that column is available.

Raises an ActiveRecordError when called on new objects, or when the name attribute is marked as readonly.

# File activerecord/lib/active_record/persistence.rb, line 192
    def update_column(name, value)
      name = name.to_s
      raise ActiveRecordError, "#{name} is marked as readonly" if self.class.readonly_attributes.include?(name)
      raise ActiveRecordError, "can not update on a new record object" unless persisted?

      updated_count = self.class.unscoped.update_all({ name => value }, self.class.primary_key => id)

      raw_write_attribute(name, value)

      updated_count == 1
    end

1Note

Use `update_all` for Updating the Same Column for Multiple Records.

joshuapinter · Nov 9, 2013

http://apidock.com/rails/ActiveRecord/Relation/update_all

Client.where( country: 'Canada' ).update_all( country_code: 'CA' )

update_column

1Note

Use `update_all` for Updating the Same Column for Multiple Records.

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