diff options
Diffstat (limited to 'activerecord/lib/active_record/attribute_methods/serialization.rb')
| -rw-r--r-- | activerecord/lib/active_record/attribute_methods/serialization.rb | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/serialization.rb b/activerecord/lib/active_record/attribute_methods/serialization.rb index d0d8a968c5..65978aea2a 100644 --- a/activerecord/lib/active_record/attribute_methods/serialization.rb +++ b/activerecord/lib/active_record/attribute_methods/serialization.rb @@ -9,7 +9,19 @@ module ActiveRecord # attribute using this method and it will be handled automatically. The # serialization is done through YAML. If +class_name+ is specified, the # serialized object must be of that class on assignment and retrieval. - # Otherwise <tt>SerializationTypeMismatch</tt> will be raised. + # Otherwise SerializationTypeMismatch will be raised. + # + # Empty objects as <tt>{}</tt>, in the case of +Hash+, or <tt>[]</tt>, in the case of + # +Array+, will always be persisted as null. + # + # Keep in mind that database adapters handle certain serialization tasks + # for you. For instance: +json+ and +jsonb+ types in PostgreSQL will be + # converted between JSON object/array syntax and Ruby +Hash+ or +Array+ + # objects transparently. There is no need to use #serialize in this + # case. + # + # For more complex cases, such as conversion to or from your application + # domain objects, consider using the ActiveRecord::Attributes API. # # ==== Parameters # |