thr3ads.net - Rails - has_many_polymorphs: Tag could not be preloaded: #<ActiveRecord::Associations::PolymorphicError [Feb 2008]

If this information is useful, please help other people find it:
Share via:

Jörg Battermann

2008-Feb-19 22:39 UTC

has_many_polymorphs: Tag could not be preloaded: #<ActiveRecord::Associations::PolymorphicError

Hello there,

I''ve also posted this problem at the hmp forum @
http://rubyforge.org/forum/forum.php?thread_id=22433&forum_id=16450
but since this group has some higher traffic, maybe the one or another
can help me here, too.

I have a little rails (2.0.2) app with very few models so far, one
being a user model which has_many text_snippets and also has_many
bookmarks. Resources wise, these two are nested under the users .. so
callable via /users/1/bookmarks/15 etc.

I ran the hmp tagging generator with the two models Bookmark and
Textsnippet which led to this entry in the tag.rb file:

  has_many_polymorphs :taggables,
    :from => [:bookmarks, :text_snippets],
    :through => :taggings,
    :dependent => :destroy,
    :skip_duplicates => false,
    :parent_extend => proc {
      # Defined on the taggable models, not on Tag itself. Return the
tagnames associated with this record as a string.
      def to_s
        self.map(&:name).sort.join(Tag::DELIMITER)
      end
    }

So far so good. However, when starting the server, this is being
logged:

** has_many_polymorphs: rails environment detected
** has_many_polymorphs: loaded ok
** has_many_polymorphs: autoload hook invoked
** has_many_polymorphs: preloading parent model Tag
** has_many_polymorphs: associating Tag.taggables
** has_many_polymorphs: Tag could not be preloaded:
#<ActiveRecord::Associations::PolymorphicError: Could not find a valid
class for :bookmarks. If it''s namespaced, be sure to specify it
as :"module/bookmarks" instead.>
** has_many_polymorphs: preloading parent model Tagging
** has_many_polymorphs: autoload hook invoked
** has_many_polymorphs: preloading parent model Tag
** has_many_polymorphs: associating Tag.taggables
  SQL (0.028267)   SET NAMES ''utf8''
  SQL (0.010828)   SET SQL_AUTO_IS_NULL=0
  Bookmark Columns (0.103882)   SHOW FIELDS FROM `bookmarks`
  Tagging Columns (0.018256)   SHOW FIELDS FROM `taggings`
  TextSnippet Columns (0.019460)   SHOW FIELDS FROM `text_snippets`
** has_many_polymorphs: preloading parent model Tagging

Now neither the text_snippets nor the bookmarks are taggable (double-
checked via console). However, this error is somewhat misleading
or ... well.. dunno.. the Bookmark class does in fact exist:

Loading development environment (Rails 2.0.2)>> Bookmark.inspect=> "Bookmark(id: integer, user_id: integer, url: string, title:
string, description: text, created_at: datetime, updated_at:
datetime)"

I am really kind of confused now where to start digging/looking...
tried all I could, double-checked whether bookmarks'' files are all
correct.. which they are.. but still it ain''t working.

Has anyone else come across this somewhere/somehow? Any ideas/
suggestions? :)

-J
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Jörg Battermann

2008-Feb-19 23:35 UTC

head link

Re: has_many_polymorphs: Tag could not be preloaded: #<ActiveRecord::Associations::PolymorphicError

Ok - found it :-/

I have a custom validation in my Bookmark model. This validation is
declared in lib/custom_validations.rb ... which is require''ed in
environment.rb. Now hmp (the plugin) gets loaded before the
custom_validations.rb file is loaded.. and therefore the Bookmark
class looks b0rked at that very moment.

Once rails has in fact loaded the custom_validations.rb file,
everything works fine at the Bookmark-class level.. but hmp actually
isn''t.

Hrrmm - what can I do now? I mean... I can''t be the only one using
custom validations in the lib/ folder in combination with hmp... :-/


-j

On Feb 19, 11:39 pm, "Jörg Battermann"
<j...-0P9kJONFmSkxbLibK+HVikEOCMrvLtNR@public.gmane.org>
wrote:> Hello there,
>
> I''ve also posted this problem at the hmp forum
@http://rubyforge.org/forum/forum.php?thread_id=22433&forum_id=16450
> but since this group has some higher traffic, maybe the one or another
> can help me here, too.
>
> I have a little rails (2.0.2) app with very few models so far, one
> being a user model which has_many text_snippets and also has_many
> bookmarks. Resources wise, these two are nested under the users .. so
> callable via /users/1/bookmarks/15 etc.
>
> I ran the hmp tagging generator with the two models Bookmark and
> Textsnippet which led to this entry in the tag.rb file:
>
>   has_many_polymorphs :taggables,
>     :from => [:bookmarks, :text_snippets],
>     :through => :taggings,
>     :dependent => :destroy,
>     :skip_duplicates => false,
>     :parent_extend => proc {
>       # Defined on the taggable models, not on Tag itself. Return the
> tagnames associated with this record as a string.
>       def to_s
>         self.map(&:name).sort.join(Tag::DELIMITER)
>       end
>     }
>
> So far so good. However, when starting the server, this is being
> logged:
>
> ** has_many_polymorphs: rails environment detected
> ** has_many_polymorphs: loaded ok
> ** has_many_polymorphs: autoload hook invoked
> ** has_many_polymorphs: preloading parent model Tag
> ** has_many_polymorphs: associating Tag.taggables
> ** has_many_polymorphs: Tag could not be preloaded:
> #<ActiveRecord::Associations::PolymorphicError: Could not find a valid
> class for :bookmarks. If it''s namespaced, be sure to specify it
> as :"module/bookmarks" instead.>
> ** has_many_polymorphs: preloading parent model Tagging
> ** has_many_polymorphs: autoload hook invoked
> ** has_many_polymorphs: preloading parent model Tag
> ** has_many_polymorphs: associating Tag.taggables
>   SQL (0.028267)   SET NAMES ''utf8''
>   SQL (0.010828)   SET SQL_AUTO_IS_NULL=0
>   Bookmark Columns (0.103882)   SHOW FIELDS FROM `bookmarks`
>   Tagging Columns (0.018256)   SHOW FIELDS FROM `taggings`
>   TextSnippet Columns (0.019460)   SHOW FIELDS FROM `text_snippets`
> ** has_many_polymorphs: preloading parent model Tagging
>
> Now neither the text_snippets nor the bookmarks are taggable (double-
> checked via console). However, this error is somewhat misleading
> or ... well.. dunno.. the Bookmark class does in fact exist:
>
> Loading development environment (Rails 2.0.2)>> Bookmark.inspect
>
> => "Bookmark(id: integer, user_id: integer, url: string, title:
> string, description: text, created_at: datetime, updated_at:
> datetime)"
>
> I am really kind of confused now where to start digging/looking...
> tried all I could, double-checked whether bookmarks'' files are all
> correct.. which they are.. but still it ain''t working.
>
> Has anyone else come across this somewhere/somehow? Any ideas/
> suggestions? :)
>
> -J--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

AndyV

2008-Feb-20 18:48 UTC

head link

Re: has_many_polymorphs: Tag could not be preloaded: #<ActiveRecord::Associations::PolymorphicError

In Rails 2.x you should be able to use initializers (/config/
initializers + environment) to control the load order.  Likely a well-
placed ''require'' will solve the problem.

On Feb 19, 6:35 pm, "Jörg Battermann"
<j...-0P9kJONFmSkxbLibK+HVikEOCMrvLtNR@public.gmane.org>
wrote:> Ok - found it :-/
>
> I have a custom validation in my Bookmark model. This validation is
> declared in lib/custom_validations.rb ... which is require''ed in
> environment.rb. Now hmp (the plugin) gets loaded before the
> custom_validations.rb file is loaded.. and therefore the Bookmark
> class looks b0rked at that very moment.
>
> Once rails has in fact loaded the custom_validations.rb file,
> everything works fine at the Bookmark-class level.. but hmp actually
> isn''t.
>
> Hrrmm - what can I do now? I mean... I can''t be the only one using
> custom validations in the lib/ folder in combination with hmp... :-/
>
> -j
>
> On Feb 19, 11:39 pm, "Jörg Battermann"
<j...-0P9kJONFmSkxbLibK+HVikEOCMrvLtNR@public.gmane.org>
> wrote:
>
> > Hello there,
>
> > I''ve also posted this problem at the hmp forum
@http://rubyforge.org/forum/forum.php?thread_id=22433&forum_id=16450
> > but since this group has some higher traffic, maybe the one or another
> > can help me here, too.
>
> > I have a little rails (2.0.2) app with very few models so far, one
> > being a user model which has_many text_snippets and also has_many
> > bookmarks. Resources wise, these two are nested under the users .. so
> > callable via /users/1/bookmarks/15 etc.
>
> > I ran the hmp tagging generator with the two models Bookmark and
> > Textsnippet which led to this entry in the tag.rb file:
>
> >   has_many_polymorphs :taggables,
> >     :from => [:bookmarks, :text_snippets],
> >     :through => :taggings,
> >     :dependent => :destroy,
> >     :skip_duplicates => false,
> >     :parent_extend => proc {
> >       # Defined on the taggable models, not on Tag itself. Return the
> > tagnames associated with this record as a string.
> >       def to_s
> >         self.map(&:name).sort.join(Tag::DELIMITER)
> >       end
> >     }
>
> > So far so good. However, when starting the server, this is being
> > logged:
>
> > ** has_many_polymorphs: rails environment detected
> > ** has_many_polymorphs: loaded ok
> > ** has_many_polymorphs: autoload hook invoked
> > ** has_many_polymorphs: preloading parent model Tag
> > ** has_many_polymorphs: associating Tag.taggables
> > ** has_many_polymorphs: Tag could not be preloaded:
> > #<ActiveRecord::Associations::PolymorphicError: Could not find a
valid
> > class for :bookmarks. If it''s namespaced, be sure to specify
it
> > as :"module/bookmarks" instead.>
> > ** has_many_polymorphs: preloading parent model Tagging
> > ** has_many_polymorphs: autoload hook invoked
> > ** has_many_polymorphs: preloading parent model Tag
> > ** has_many_polymorphs: associating Tag.taggables
> >   SQL (0.028267)   SET NAMES ''utf8''
> >   SQL (0.010828)   SET SQL_AUTO_IS_NULL=0
> >   Bookmark Columns (0.103882)   SHOW FIELDS FROM `bookmarks`
> >   Tagging Columns (0.018256)   SHOW FIELDS FROM `taggings`
> >   TextSnippet Columns (0.019460)   SHOW FIELDS FROM `text_snippets`
> > ** has_many_polymorphs: preloading parent model Tagging
>
> > Now neither the text_snippets nor the bookmarks are taggable (double-
> > checked via console). However, this error is somewhat misleading
> > or ... well.. dunno.. the Bookmark class does in fact exist:
>
> > Loading development environment (Rails 2.0.2)>> Bookmark.inspect
>
> > => "Bookmark(id: integer, user_id: integer, url: string,
title:
> > string, description: text, created_at: datetime, updated_at:
> > datetime)"
>
> > I am really kind of confused now where to start digging/looking...
> > tried all I could, double-checked whether bookmarks'' files
are all
> > correct.. which they are.. but still it ain''t working.
>
> > Has anyone else come across this somewhere/somehow? Any ideas/
> > suggestions? :)
>
> > -J--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

Rails - Feb 2008 - has_many_polymorphs: Tag could not be preloaded: #<ActiveRecord::Associations::PolymorphicError

has_many_polymorphs: Tag could not be preloaded: #<ActiveRecord::Associations::PolymorphicError

Re: has_many_polymorphs: Tag could not be preloaded: #<ActiveRecord::Associations::PolymorphicError

Re: has_many_polymorphs: Tag could not be preloaded: #<ActiveRecord::Associations::PolymorphicError