Hi, I''m sure I''m doing something obviously incorrect here, but have stared at it for so long I can''t seem to find it. I want to serialize some activerecord objects as rows in a table. Basically I can:>> import_object = ImportObject.new=> #<ImportObject id: nil, object: nil, created_at: nil, updated_at: nil>>> import_object.object = Fubar.find(32)=> #<Fubar id: 32, name: "Fubar''d" >>> import_object=> #<ImportObject id: 2958, object: #<Fubar id: 32, name: "Fubar''d" >, created_at: "2009-07-15 22:42:40", updated_at: "2009-07-15 22:42:40"> Perfect! Until I save....>> import_object.save=> true>> io = ImportObject.find(2958)=> #<ImportObject id: 2958, import_id: nil, object: 32, created_at: "2009-07-15 22:42:40", updated_at: "2009-07-15 23:10:11"> For some reason the object is getting saved as a fixnum, and I can''t figure out why. Any ideas? Here''s the setup: class CreateImportObjects < ActiveRecord::Migration def self.up create_table :import_objects do |t| t.string :object, :limit => 512 t.timestamps end end def self.down drop_table :import_objects end end class ImportObject < ActiveRecord::Base serialize :object end
Solution found for posterity: In order to serialize active records I had to do two things: 1) Wrap the object in an array (import_object.object = [fubar]) The problem here, after a save, I was getting a yaml record returned instead of a de-serialized object. After much poking around I found this excellent article explaining that somehow custom classes (including models it seems) were not in scope: http://itsignals.cascadia.com.au/?p=10 In the comments someone made the insightful recommendation to require the object being serialized in the class doing the serialization. 2) So, I included a requires statement for any class that I want to serialize. (require "Fubar" in the example below). Hope this saves someone some time! On Jul 15, 7:14 pm, Joe C <joe.cai...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> Hi, I''m sure I''m doing something obviously incorrect here, but have > stared at it for so long I can''t seem to find it. > > I want to serialize some activerecord objects as rows in a table. > Basically I can: > > >> import_object = ImportObject.new > > => #<ImportObject id: nil, object: nil, created_at: nil, updated_at: > nil> > > >> import_object.object = Fubar.find(32) > > => #<Fubar id: 32, name: "Fubar''d" > > > >> import_object > > => #<ImportObject id: 2958, object: #<Fubar id: 32, name: "Fubar''d" >, > created_at: "2009-07-15 22:42:40", updated_at: "2009-07-15 22:42:40"> > > Perfect! Until I save.... > > >> import_object.save > > => true > > >> io = ImportObject.find(2958) > > => #<ImportObject id: 2958, import_id: nil, object: 32, created_at: > "2009-07-15 22:42:40", updated_at: "2009-07-15 23:10:11"> > > For some reason the object is getting saved as a fixnum, and I can''t > figure out why. Any ideas? > > Here''s the setup: > > class CreateImportObjects < ActiveRecord::Migration > def self.up > create_table :import_objects do |t| > t.string :object, :limit => 512 > t.timestamps > end > end > > def self.down > drop_table :import_objects > end > end > > class ImportObject < ActiveRecord::Base > serialize :object > end
One last thing:
3) You will need to put the "requires <object>" _Anyplace_ you
de-
serialize, this could include a controller unless you like in this
example:
def create
import = Import.find(session[:import_id])
@collection = import.objects
import_object = @collection.first
puts import_object
puts import_object.class
@headers = @collection.first.class.import_headers
end
Without the requires statement the "puts" give this:
#<YAML::Object:0x10332eea8>
Fubar
So calling any Fubar functions on the de-serialized object will fail.
Add the "requires" and expected behavior results:
#<Fubar:0x10325d5b0>
Fubar
Hopefully done with this
On Jul 16, 11:31 am, Joe C
<joe.cai...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Solution found for posterity:
>
> In order to serialize active records I had to do two things:
> 1) Wrap the object in an array (import_object.object = [fubar])
>
> The problem here, after a save, I was getting a yaml record returned
> instead of a de-serialized object. After much poking around I found
> this excellent article explaining that somehow custom classes
> (including models it seems) were not in scope:
>
> http://itsignals.cascadia.com.au/?p=10
>
> In the comments someone made the insightful recommendation to require
> the object being serialized in the class doing the serialization.
>
> 2) So, I included a requires statement for any class that I want to
> serialize. (require "Fubar" in the example below).
>
> Hope this saves someone some time!
>
> On Jul 15, 7:14 pm, Joe C
<joe.cai...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Hi, I''m sure I''m doing something obviously incorrect
here, but have
> > stared at it for so long I can''t seem to find it.
>
> > I want to serialize some activerecord objects as rows in a table.
> > Basically I can:
>
> > >> import_object = ImportObject.new
>
> > => #<ImportObject id: nil, object: nil, created_at: nil,
updated_at:
> > nil>
>
> > >> import_object.object = Fubar.find(32)
>
> > => #<Fubar id: 32, name: "Fubar''d" >
>
> > >> import_object
>
> > => #<ImportObject id: 2958, object: #<Fubar id: 32, name:
"Fubar''d" >,
> > created_at: "2009-07-15 22:42:40", updated_at:
"2009-07-15 22:42:40">
>
> > Perfect! Until I save....
>
> > >> import_object.save
>
> > => true
>
> > >> io = ImportObject.find(2958)
>
> > => #<ImportObject id: 2958, import_id: nil, object: 32,
created_at:
> > "2009-07-15 22:42:40", updated_at: "2009-07-15
23:10:11">
>
> > For some reason the object is getting saved as a fixnum, and I
can''t
> > figure out why. Any ideas?
>
> > Here''s the setup:
>
> > class CreateImportObjects < ActiveRecord::Migration
> > def self.up
> > create_table :import_objects do |t|
> > t.string :object, :limit => 512
> > t.timestamps
> > end
> > end
>
> > def self.down
> > drop_table :import_objects
> > end
> > end
>
> > class ImportObject < ActiveRecord::Base
> > serialize :object
> > end
Upon closer review... and a weekend to clear my head... This approach was just flat wrong. Don''t even think of serializing activeRecords. It causes all sorts of problems, some you will see, some will be beneath the water line. I found memcached and after reading about it, it is exactly what I''m looking for. On Jul 16, 2:15 pm, Joe C <joe.cai...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> One last thing: > > 3) You will need to put the "requires <object>" _Anyplace_ you de- > serialize, this could include a controller unless you like in this > example: > > def create > import = Import.find(session[:import_id]) > > @collection = import.objects > import_object = -XITSOACK58NRmkWjgowj4A@public.gmane.org > puts import_object > puts import_object.class > @headers = @collection.first.class.import_headers > end > > Without the requires statement the "puts" give this: > #<YAML::Object:0x10332eea8> > Fubar > > So calling any Fubar functions on the de-serialized object will fail. > > Add the "requires" and expected behavior results: > #<Fubar:0x10325d5b0> > Fubar > > Hopefully done with this > > On Jul 16, 11:31 am, Joe C <joe.cai...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > Solution found for posterity: > > > In order to serialize active records I had to do two things: > > 1) Wrap the object in an array (import_object.object = [fubar]) > > > The problem here, after a save, I was getting a yaml record returned > > instead of a de-serialized object. After much poking around I found > > this excellent article explaining that somehow custom classes > > (including models it seems) were not in scope: > > >http://itsignals.cascadia.com.au/?p=10 > > > In the comments someone made the insightful recommendation to require > > the object being serialized in the class doing the serialization. > > > 2) So, I included a requires statement for any class that I want to > > serialize. (require "Fubar" in the example below). > > > Hope this saves someone some time! > > > On Jul 15, 7:14 pm, Joe C <joe.cai...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > > Hi, I''m sure I''m doing something obviously incorrect here, but have > > > stared at it for so long I can''t seem to find it. > > > > I want to serialize some activerecord objects as rows in a table. > > > Basically I can: > > > > >> import_object = ImportObject.new > > > > => #<ImportObject id: nil, object: nil, created_at: nil, updated_at: > > > nil> > > > > >> import_object.object = Fubar.find(32) > > > > => #<Fubar id: 32, name: "Fubar''d" > > > > > >> import_object > > > > => #<ImportObject id: 2958, object: #<Fubar id: 32, name: "Fubar''d" >, > > > created_at: "2009-07-15 22:42:40", updated_at: "2009-07-15 22:42:40"> > > > > Perfect! Until I save.... > > > > >> import_object.save > > > > => true > > > > >> io = ImportObject.find(2958) > > > > => #<ImportObject id: 2958, import_id: nil, object: 32, created_at: > > > "2009-07-15 22:42:40", updated_at: "2009-07-15 23:10:11"> > > > > For some reason the object is getting saved as a fixnum, and I can''t > > > figure out why. Any ideas? > > > > Here''s the setup: > > > > class CreateImportObjects < ActiveRecord::Migration > > > def self.up > > > create_table :import_objects do |t| > > > t.string :object, :limit => 512 > > > t.timestamps > > > end > > > end > > > > def self.down > > > drop_table :import_objects > > > end > > > end > > > > class ImportObject < ActiveRecord::Base > > > serialize :object > > > end