undefined method `unserialize_attribute' in ruby on rails - ruby-on-rails

Question

I am working on upgrading rails application, I have a method unserialize_attribue in rails 3 but I am not able to see this method in rails 5.
What is the alternative for unserialize_attribute in rails 5 or any suggestion on what can I do, Thanks

Answer 1

unserialize_attribute is removed from rails-5 but you can unserialized value in different way,
Method:1
> #user.accessible_attribute
# => {"attr1"=>["Email id"], "attr2"=>["First Name"], "attr3"=>["Last Name"]}
> #user.attributes_before_type_cast['accessible_attribute']
# => "--- !ruby/hash:ActionController::Parameters\nattr1:\n- Email id\nattr2:\n- First Name\nattr3:\n- Last Name\n"
Method:2
#user.instance_variable_get(:#attributes)['accessible_attribute'].value_before_type_cast
# => "--- !ruby/hash:ActionController::Parameters\nattr1:\n- Email id\nattr2:\n- First Name\nattr3:\n- Last Name\n"
Method:3
> #accessible_attribute = ActiveRecord::Base.connection.execute("SELECT accessible_attribute FROM users WHERE id = #{#user.id}")
(0.4ms) SELECT accessible_attribute FROM users WHERE id = 3
# => #<Mysql2::Result:0xe0fc374 #query_options={:as=>:array, :async=>false, :cast_booleans=>false, :symbolize_keys=>false, :database_timezone=>:utc, :application_timezone=>nil, :cache_rows=>true, :connect_flags=>-2147442171, :cast=>true, :default_file=>nil, :default_group=>nil, :adapter=>"mysql2", :encoding=>"utf8mb4", :collation=>"utf8mb4_unicode_ci", :database=>"example_development", :pool=>5, :username=>"root", :password=>"password", :socket=>"/var/run/mysqld/mysqld.sock", :flags=>2}>
> #accessible_attribute.first[0]
# => "--- !ruby/hash:ActionController::Parameters\nattr1:\n- Email id\nattr2:\n- First Name\nattr3:\n- Last Name\n"
Note: Precisely, Some prefer to take attribute value unserialized by #user.accessible_attribute.to_yaml also.

Answer 2

I got it working using serializable_hash and it is available in rails 3 as well as in rails 5
I have this code written in rails 3
unserialized_value = unserialize_attribute(options[:serialized_column]) || { }
which I changed to
unserialized_value = self.serializable_hash[options[:serialized_column]] || { }
both method returns the same hash object.